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Vulnerability from cleanstart
Published
2026-01-30 14:44
Modified
2026-01-29 18:58
Summary
excluded subdomain constraint in a certificate chain does not restrict the usage of wildcard SANs in the leaf certificate
Details
Multiple security vulnerabilities affect the velero package. An excluded subdomain constraint in a certificate chain does not restrict the usage of wildcard SANs in the leaf certificate. See references for individual vulnerability details.
{
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"details": "Multiple security vulnerabilities affect the velero package. An excluded subdomain constraint in a certificate chain does not restrict the usage of wildcard SANs in the leaf certificate. See references for individual vulnerability details.",
"id": "CLEANSTART-2026-OL25917",
"modified": "2026-01-29T18:58:54Z",
"published": "2026-01-30T14:44:22.881508Z",
"references": [
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"type": "ADVISORY",
"url": "https://github.com/cleanstart-dev/cleanstart-security-advisories/tree/main/advisories/2026/CLEANSTART-2026-OL25917.json"
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"type": "WEB",
"url": "https://osv.dev/vulnerability/CVE-2025-58185"
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"type": "WEB",
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"url": "https://osv.dev/vulnerability/CVE-2025-58188"
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{
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},
{
"type": "WEB",
"url": "https://osv.dev/vulnerability/CVE-2025-61725"
},
{
"type": "WEB",
"url": "https://osv.dev/vulnerability/CVE-2025-61727"
},
{
"type": "WEB",
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{
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"url": "https://osv.dev/vulnerability/GHSA-cgrx-mc8f-2prm"
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"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-58183"
},
{
"type": "WEB",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-58185"
},
{
"type": "WEB",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-58187"
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"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-58188"
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"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-61723"
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"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-61725"
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"type": "WEB",
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},
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"type": "WEB",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-61729"
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"related": [],
"schema_version": "1.7.3",
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"upstream": [
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"GHSA-cgrx-mc8f-2prm",
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"GHSA-pwhc-rpq9-4c8w"
]
}
CVE-2025-58251 (GCVE-0-2025-58251)
Vulnerability from cvelistv5 – Published: 2025-09-22 18:23 – Updated: 2025-09-23 16:13
VLAI?
EPSS
Title
WordPress Sticky Header Effects for Elementor Plugin <= 2.1.2 - Broken Access Control Vulnerability
Summary
Missing Authorization vulnerability in POSIMYTH Sticky Header Effects for Elementor allows Exploiting Incorrectly Configured Access Control Security Levels. This issue affects Sticky Header Effects for Elementor: from n/a through 2.1.2.
Severity ?
4.3 (Medium)
CWE
- CWE-862 - Missing Authorization
Assigner
References
| URL | Tags | |
|---|---|---|
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| POSIMYTH | Sticky Header Effects for Elementor |
Affected:
n/a , ≤ 2.1.2
(custom)
|
Credits
Peter Thaleikis (Patchstack Alliance)
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CVE-2025-58188 (GCVE-0-2025-58188)
Vulnerability from cvelistv5 – Published: 2025-10-29 22:10 – Updated: 2025-11-04 21:13
VLAI?
EPSS
Title
Panic when validating certificates with DSA public keys in crypto/x509
Summary
Validating certificate chains which contain DSA public keys can cause programs to panic, due to a interface cast that assumes they implement the Equal method. This affects programs which validate arbitrary certificate chains.
Severity ?
7.5 (High)
CWE
- CWE-248 - Uncaught Exception
Assigner
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Go standard library | crypto/x509 |
Affected:
0 , < 1.24.8
(semver)
Affected: 1.25.0 , < 1.25.2 (semver) |
Credits
Jakub Ciolek
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CVE-2025-61729 (GCVE-0-2025-61729)
Vulnerability from cvelistv5 – Published: 2025-12-02 18:54 – Updated: 2025-12-03 19:37
VLAI?
EPSS
Title
Excessive resource consumption when printing error string for host certificate validation in crypto/x509
Summary
Within HostnameError.Error(), when constructing an error string, there is no limit to the number of hosts that will be printed out. Furthermore, the error string is constructed by repeated string concatenation, leading to quadratic runtime. Therefore, a certificate provided by a malicious actor can result in excessive resource consumption.
Severity ?
7.5 (High)
CWE
- CWE-400 - Uncontrolled Resource Consumption
Assigner
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Go standard library | crypto/x509 |
Affected:
0 , < 1.24.11
(semver)
Affected: 1.25.0 , < 1.25.5 (semver) |
Credits
Philippe Antoine (Catena cyber)
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CVE-2025-61727 (GCVE-0-2025-61727)
Vulnerability from cvelistv5 – Published: 2025-12-03 19:37 – Updated: 2025-12-03 22:06
VLAI?
EPSS
Title
Improper application of excluded DNS name constraints when verifying wildcard names in crypto/x509
Summary
An excluded subdomain constraint in a certificate chain does not restrict the usage of wildcard SANs in the leaf certificate. For example a constraint that excludes the subdomain test.example.com does not prevent a leaf certificate from claiming the SAN *.example.com.
Severity ?
6.5 (Medium)
CWE
- CWE-295 - Improper Certificate Validation
Assigner
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Go standard library | crypto/x509 |
Affected:
0 , < 1.24.11
(semver)
Affected: 1.25.0 , < 1.25.5 (semver) |
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CVE-2025-58189 (GCVE-0-2025-58189)
Vulnerability from cvelistv5 – Published: 2025-10-29 22:10 – Updated: 2025-11-04 21:13
VLAI?
EPSS
Title
ALPN negotiation error contains attacker controlled information in crypto/tls
Summary
When Conn.Handshake fails during ALPN negotiation the error contains attacker controlled information (the ALPN protocols sent by the client) which is not escaped.
Severity ?
5.3 (Medium)
CWE
- CWE-117 - Improper Output Neutralization for Logs
Assigner
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Go standard library | crypto/tls |
Affected:
0 , < 1.24.8
(semver)
Affected: 1.25.0 , < 1.25.2 (semver) |
Credits
National Cyber Security Centre Finland
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CVE-2025-46394 (GCVE-0-2025-46394)
Vulnerability from cvelistv5 – Published: 2025-04-23 00:00 – Updated: 2025-04-24 20:03
VLAI?
EPSS
Summary
In tar in BusyBox through 1.37.0, a TAR archive can have filenames hidden from a listing through the use of terminal escape sequences.
Severity ?
CWE
- CWE-451 - User Interface (UI) Misrepresentation of Critical Information
Assigner
References
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CVE-2025-58187 (GCVE-0-2025-58187)
Vulnerability from cvelistv5 – Published: 2025-10-29 22:10 – Updated: 2025-11-20 22:23
VLAI?
EPSS
Title
Quadratic complexity when checking name constraints in crypto/x509
Summary
Due to the design of the name constraint checking algorithm, the processing time of some inputs scale non-linearly with respect to the size of the certificate. This affects programs which validate arbitrary certificate chains.
Severity ?
7.5 (High)
CWE
- CWE-407 - Inefficient Algorithmic Complexity
Assigner
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Go standard library | crypto/x509 |
Affected:
0 , < 1.24.9
(semver)
Affected: 1.25.0 , < 1.25.3 (semver) |
Credits
Jakub Ciolek
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CVE-2025-61723 (GCVE-0-2025-61723)
Vulnerability from cvelistv5 – Published: 2025-10-29 22:10 – Updated: 2025-11-04 21:14
VLAI?
EPSS
Title
Quadratic complexity when parsing some invalid inputs in encoding/pem
Summary
The processing time for parsing some invalid inputs scales non-linearly with respect to the size of the input. This affects programs which parse untrusted PEM inputs.
Severity ?
7.5 (High)
CWE
- CWE-407 - Inefficient Algorithmic Complexity
Assigner
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Go standard library | encoding/pem |
Affected:
0 , < 1.24.8
(semver)
Affected: 1.25.0 , < 1.25.2 (semver) |
Credits
Jakub Ciolek
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CVE-2025-58183 (GCVE-0-2025-58183)
Vulnerability from cvelistv5 – Published: 2025-10-29 22:10 – Updated: 2025-11-04 21:13
VLAI?
EPSS
Title
Unbounded allocation when parsing GNU sparse map in archive/tar
Summary
tar.Reader does not set a maximum size on the number of sparse region data blocks in GNU tar pax 1.0 sparse files. A maliciously-crafted archive containing a large number of sparse regions can cause a Reader to read an unbounded amount of data from the archive into memory. When reading from a compressed source, a small compressed input can result in large allocations.
Severity ?
4.3 (Medium)
CWE
- CWE-400 - Uncontrolled Resource Consumption
Assigner
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Go standard library | archive/tar |
Affected:
0 , < 1.24.8
(semver)
Affected: 1.25.0 , < 1.25.2 (semver) |
Credits
Harshit Gupta (Mr HAX)
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"title": "CISA ADP Vulnrichment"
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CVE-2025-58185 (GCVE-0-2025-58185)
Vulnerability from cvelistv5 – Published: 2025-10-29 22:10 – Updated: 2025-11-04 21:13
VLAI?
EPSS
Title
Parsing DER payload can cause memory exhaustion in encoding/asn1
Summary
Parsing a maliciously crafted DER payload could allocate large amounts of memory, causing memory exhaustion.
Severity ?
5.3 (Medium)
CWE
- CWE-400 - Uncontrolled Resource Consumption
Assigner
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Go standard library | encoding/asn1 |
Affected:
0 , < 1.24.8
(semver)
Affected: 1.25.0 , < 1.25.2 (semver) |
Credits
Jakub Ciolek
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CVE-2025-61725 (GCVE-0-2025-61725)
Vulnerability from cvelistv5 – Published: 2025-10-29 22:10 – Updated: 2025-12-09 17:42
VLAI?
EPSS
Title
Excessive CPU consumption in ParseAddress in net/mail
Summary
The ParseAddress function constructs domain-literal address components through repeated string concatenation. When parsing large domain-literal components, this can cause excessive CPU consumption.
Severity ?
7.5 (High)
CWE
- CWE-407 - Inefficient Algorithmic Complexity
Assigner
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Go standard library | net/mail |
Affected:
0 , < 1.24.8
(semver)
Affected: 1.25.0 , < 1.25.2 (semver) |
Credits
Philippe Antoine (Catena cyber)
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CVE-2025-61724 (GCVE-0-2025-61724)
Vulnerability from cvelistv5 – Published: 2025-10-29 22:10 – Updated: 2025-11-04 21:14
VLAI?
EPSS
Title
Excessive CPU consumption in Reader.ReadResponse in net/textproto
Summary
The Reader.ReadResponse function constructs a response string through repeated string concatenation of lines. When the number of lines in a response is large, this can cause excessive CPU consumption.
Severity ?
5.3 (Medium)
CWE
- CWE-407 - Inefficient Algorithmic Complexity
Assigner
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Go standard library | net/textproto |
Affected:
0 , < 1.24.8
(semver)
Affected: 1.25.0 , < 1.25.2 (semver) |
Credits
Jakub Ciolek
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GHSA-CGRX-MC8F-2PRM
Vulnerability from github – Published: 2025-11-05 18:40 – Updated: 2025-11-18 18:38
VLAI?
Summary
runc container escape and denial of service due to arbitrary write gadgets and procfs write redirects
Details
Impact
This attack is primarily a more sophisticated version of CVE-2019-19921, which was a flaw which allowed an attacker to trick runc into writing the LSM process labels for a container process into a dummy tmpfs file and thus not apply the correct LSM labels to the container process. The mitigation runc applied for CVE-2019-19921 was fairly limited and effectively only caused runc to verify that when runc writes LSM labels that those labels are actual procfs files.
Rather than using a fake tmpfs file for /proc/self/attr/<label>, an attacker could instead (through various means) make /proc/self/attr/<label> reference a real procfs file, but one that would still be a no-op (such as /proc/self/sched). This would have the same effect but would clear the "is a procfs file" check. Runc is aware that this kind of attack would be possible (even going so far as to discuss this publicly as "future work" at conferences), and runc is working on a far more comprehensive mitigation of this attack, but this security issue was disclosed before runc could complete this work.
In all known versions of runc, an attacker can trick runc into misdirecting writes to /proc to other procfs files through the use of a racing container with shared mounts (runc has also verified this attack is possible to exploit using a standard Dockerfile with docker buildx build as that also permits triggering parallel execution of containers with custom shared mounts configured). This redirect could be through symbolic links in a tmpfs or theoretically other methods such as regular bind-mounts.
Note that while /proc/self/attr/<label> was the example used above (which is LSM-specific), this issue affect all writes to /proc in runc and thus also affects sysctls (written to /proc/sys/...) and some other APIs.
Additional Impacts
While investigating this issue, runc discovered that another risk with these redirected writes is that they could be redirected to dangerous files such as /proc/sysrq-trigger rather than just no-op files like /proc/self/sched. For instance, the default AppArmor profile name in Docker is docker-default, which when written to /proc/sysrq-trigger would cause the host system to crash.
When this was discovered, runc conducted an audit of other write operations within runc and found several possible areas where runc could be used as a semi-arbitrary write gadget when combined with the above race attacks. The most concerning attack scenario was the configuration of sysctls. Because the contents of the sysctl are free-form text, an attacker could use a misdirected write to write to /proc/sys/kernel/core_pattern and break out of the container (as described in CVE-2025-31133, kernel upcalls are not namespaced and so coredump helpers will run with complete root privileges on the host). Even if the attacker cannot configure custom sysctls, a valid sysctl string (when redirected to /proc/sysrq-trigger) can easily cause the machine to hang.
Note that the fact that this attack allows you to disable LSM labels makes it a very useful attack to combine with CVE-2025-31133 (as one of the only mitigations available to most users for that issue is AppArmor, and this attack would let you bypass that). However, the misdirected write issue above means that you could also achieve most of the same goals without needing to chain together attacks.
Patches
This advisory is being published as part of a set of three advisories:
- CVE-2025-31133
- CVE-2025-52881
- CVE-2025-52565
The patches fixing this issue have accordingly been combined into a single patchset. The following patches from that patchset resolve the issues in this advisory:
- db19bbed5348 ("internal/sys: add VerifyInode helper")
- 6fc191449109 ("internal: move utils.MkdirAllInRoot to internal/pathrs")
- ff94f9991bd3 ("*: switch to safer securejoin.Reopen")
- 44a0fcf685db ("go.mod: update to github.com/cyphar/filepath-securejoin@v0.5.0")
- 77889b56db93 ("internal: add wrappers for securejoin.Proc*")
- fdcc9d3cad2f ("apparmor: use safe procfs API for labels")
- ff6fe1324663 ("utils: use safe procfs for /proc/self/fd loop code")
- b3dd1bc562ed ("utils: remove unneeded EnsureProcHandle")
- 77d217c7c377 ("init: write sysctls using safe procfs API")
- 435cc81be6b7 ("init: use securejoin for /proc/self/setgroups")
- d61fd29d854b ("libct/system: use securejoin for /proc/$pid/stat")
- 4b37cd93f86e ("libct: align param type for mountCgroupV1/V2 functions")
- d40b3439a961 ("rootfs: switch to fd-based handling of mountpoint targets")
- ed6b1693b8b3 ("selinux: use safe procfs API for labels")
-
Please note that this patch includes a private patch for
github.com/opencontainers/selinuxthat could not be made public through a public pull request (as it would necessarily disclose this embargoed security issue).The patch includes a complete copy of the forked code and a
replacedirective (as well asgo mod vendorapplied), which should still work with downstream build systems. If you cannot apply this patch, you can safely drop it -- some of the other patches in this series should block these kinds of racing mount attacks entirely.See https://github.com/opencontainers/selinux/pull/237 for the upstream patch. * 3f925525b44d ("rootfs: re-allow dangling symlinks in mount targets") * a41366e74080 ("openat2: improve resilience on busy systems")
runc 1.2.8, 1.3.3, and 1.4.0-rc.3 have been released and all contain fixes for these issues. As per runc's new release model, runc 1.1.x and earlier are no longer supported and thus have not been patched.
Mitigations
-
Do not run untrusted container images from unknown or unverified sources.
-
For the basic no-op attack, this attack allows a container process to run with the same LSM labels as
runc. For most AppArmor deployments this means it will beunconfined, and for SELinux it will likely becontainer_runtime_t. Runc has not conducted in-depth testing of the impact on SELinux -- it is possible that it provides some reasonable protection but it seems likely that an attacker could cause harm to systems even with such an SELinux setup. -
For the more involved redirect and write gadget attacks, unfortunately most LSM profiles (including the standard container-selinux profiles) provide the container runtime access to sysctl files (including
/proc/sysrq-trigger) and so LSMs likely do not provide much protection against these attacks. -
Using rootless containers provides some protection against these kinds of bugs (privileged writes in runc being redirected) -- by having runc itself be an unprivileged process, in general you would expect the impact scope of a runc bug to be less severe as it would only have the privileges afforded to the host user which spawned runc. For this particular bug, the privilege escalation caused by the inadvertent write issue is entirely mitigated with rootless containers because the unprivileged user that the
runcprocess is executing as cannot write to the aforementioned procfs files (even intentionally).
Other Runtimes
As this vulnerability boils down to a fairly easy-to-make logic bug, runc has provided information to other OCI (crun, youki) and non-OCI (LXC) container runtimes about this vulnerability.
Based on discussions with other runtimes, it seems that crun and youki may have similar security issues and will release a co-ordinated security release along with runc. LXC appears to use the host's /proc for all procfs operations, and so is likely not vulnerable to this issue (this is a trade-off -- runc uses the container's procfs to avoid CVE-2016-9962-style attacks).
Credits
Thanks to Li Fubang (@lifubang from acmcoder.com, CIIC) and Tõnis Tiigi (@tonistiigi from Docker) for both independently discovering this vulnerability, as well as Aleksa Sarai (@cyphar from SUSE) for the original research into this class of security issues and solutions.
Additional thanks go to Tõnis Tiigi for finding some very useful exploit templates for these kinds of race attacks using docker buildx build.
Severity ?
{
"affected": [
{
"database_specific": {
"last_known_affected_version_range": "\u003c= 1.2.7"
},
"package": {
"ecosystem": "Go",
"name": "github.com/opencontainers/runc"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "1.2.8"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"database_specific": {
"last_known_affected_version_range": "\u003c= 1.12.0"
},
"package": {
"ecosystem": "Go",
"name": "github.com/opencontainers/selinux"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "1.13.0"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"database_specific": {
"last_known_affected_version_range": "\u003c= 1.3.2"
},
"package": {
"ecosystem": "Go",
"name": "github.com/opencontainers/runc"
},
"ranges": [
{
"events": [
{
"introduced": "1.3.0-rc.1"
},
{
"fixed": "1.3.3"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"database_specific": {
"last_known_affected_version_range": "\u003c= 1.4.0-rc.2"
},
"package": {
"ecosystem": "Go",
"name": "github.com/opencontainers/runc"
},
"ranges": [
{
"events": [
{
"introduced": "1.4.0-rc.1"
},
{
"fixed": "1.4.0-rc.3"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2025-52881"
],
"database_specific": {
"cwe_ids": [
"CWE-363",
"CWE-61"
],
"github_reviewed": true,
"github_reviewed_at": "2025-11-05T18:40:40Z",
"nvd_published_at": "2025-11-06T21:15:42Z",
"severity": "HIGH"
},
"details": "### Impact ###\n\nThis attack is primarily a more sophisticated version of CVE-2019-19921, which was a flaw which allowed an attacker to trick runc into writing the LSM process labels for a container process into a dummy `tmpfs` file and thus not apply the correct LSM labels to the container process. The mitigation runc applied for CVE-2019-19921 was fairly limited and effectively only caused runc to verify that when runc writes LSM labels that those labels are actual procfs files.\n\nRather than using a fake `tmpfs` file for `/proc/self/attr/\u003clabel\u003e`, an attacker could instead (through various means) make `/proc/self/attr/\u003clabel\u003e` reference a real `procfs` file, but one that would still be a no-op (such as `/proc/self/sched`). This would have the same effect but would clear the \"is a procfs file\" check. Runc is aware that this kind of attack would be possible (even going so far as to discuss this publicly as \"future work\" at conferences), and runc is working on a far more comprehensive mitigation of this attack, but this security issue was disclosed before runc could complete this work.\n\nIn all known versions of runc, an attacker can trick runc into misdirecting writes to `/proc` to other procfs files through the use of a racing container with shared mounts (runc has also verified this attack is possible to exploit using a standard Dockerfile with `docker buildx build` as that also permits triggering parallel execution of containers with custom shared mounts configured). This redirect could be through symbolic links in a `tmpfs` or theoretically other methods such as regular bind-mounts.\n\nNote that while `/proc/self/attr/\u003clabel\u003e` was the example used above (which is LSM-specific), this issue affect all writes to `/proc` in runc and thus also affects sysctls (written to `/proc/sys/...`) and some other APIs.\n\n#### Additional Impacts ####\n\nWhile investigating this issue, runc discovered that another risk with these redirected writes is that they could be redirected to dangerous files such as `/proc/sysrq-trigger` rather than just no-op files like `/proc/self/sched`. For instance, the default AppArmor profile name in Docker is `docker-default`, which when written to `/proc/sysrq-trigger` would cause the host system to crash.\n\nWhen this was discovered, runc conducted an audit of other write operations within runc and found several possible areas where runc could be used as a semi-arbitrary write gadget when combined with the above race attacks. The most concerning attack scenario was the configuration of sysctls. Because the contents of the sysctl are free-form text, an attacker could use a misdirected write to write to `/proc/sys/kernel/core_pattern` and break out of the container (as described in CVE-2025-31133, kernel upcalls are not namespaced and so coredump helpers will run with complete root privileges on the host). Even if the attacker cannot configure custom sysctls, a valid sysctl string (when redirected to `/proc/sysrq-trigger`) can easily cause the machine to hang.\n\nNote that the fact that this attack allows you to disable LSM labels makes it a very useful attack to combine with CVE-2025-31133 (as one of the only mitigations available to most users for that issue is AppArmor, and this attack would let you bypass that). However, the misdirected write issue above means that you could also achieve most of the same goals without needing to chain together attacks.\n\n### Patches ###\n\nThis advisory is being published as part of a set of three advisories:\n\n * CVE-2025-31133\n * CVE-2025-52881\n * CVE-2025-52565\n\nThe patches fixing this issue have accordingly been combined into a single patchset. The following patches from that patchset resolve the issues in this advisory:\n\n * db19bbed5348 (\"internal/sys: add VerifyInode helper\")\n * 6fc191449109 (\"internal: move utils.MkdirAllInRoot to internal/pathrs\")\n * ff94f9991bd3 (\"*: switch to safer securejoin.Reopen\")\n * 44a0fcf685db (\"go.mod: update to github.com/cyphar/filepath-securejoin@v0.5.0\")\n * 77889b56db93 (\"internal: add wrappers for securejoin.Proc*\")\n * fdcc9d3cad2f (\"apparmor: use safe procfs API for labels\")\n * ff6fe1324663 (\"utils: use safe procfs for /proc/self/fd loop code\")\n * b3dd1bc562ed (\"utils: remove unneeded EnsureProcHandle\")\n * 77d217c7c377 (\"init: write sysctls using safe procfs API\")\n * 435cc81be6b7 (\"init: use securejoin for /proc/self/setgroups\")\n * d61fd29d854b (\"libct/system: use securejoin for /proc/$pid/stat\")\n * 4b37cd93f86e (\"libct: align param type for mountCgroupV1/V2 functions\")\n * d40b3439a961 (\"rootfs: switch to fd-based handling of mountpoint targets\")\n * ed6b1693b8b3 (\"selinux: use safe procfs API for labels\")\n - Please note that this patch includes a private patch for `github.com/opencontainers/selinux` that could not be made public through a public pull request (as it would necessarily disclose this embargoed security issue).\n\n The patch includes a complete copy of the forked code and a `replace` directive (as well as `go mod vendor` applied), which should still work with downstream build systems. If you cannot apply this patch, you can safely drop it -- some of the other patches in this series should block these kinds of racing mount attacks entirely.\n\n See https://github.com/opencontainers/selinux/pull/237 for the upstream patch.\n * 3f925525b44d (\"rootfs: re-allow dangling symlinks in mount targets\")\n * a41366e74080 (\"openat2: improve resilience on busy systems\")\n\nrunc 1.2.8, 1.3.3, and 1.4.0-rc.3 have been released and all contain fixes for these issues. As per [runc\u0027s new release model][RELEASES.md], runc 1.1.x and earlier are no longer supported and thus have not been patched.\n\n[CVE-2025-31133]: https://github.com/opencontainers/runc/security/advisories/GHSA-9493-h29p-rfm2\n[CVE-2025-52565]: https://github.com/opencontainers/runc/security/advisories/GHSA-qw9x-cqr3-wc7r\n[CVE-2025-52881]: https://github.com/opencontainers/runc/security/advisories/GHSA-cgrx-mc8f-2prm\n[RELEASES.md]: https://github.com/opencontainers/runc/blob/v1.4.0-rc.2/RELEASES.md\n\n### Mitigations ###\n\n * Do not run untrusted container images from unknown or unverified sources.\n\n * For the basic no-op attack, this attack allows a container process to run with the same LSM labels as `runc`. For most AppArmor deployments this means it will be `unconfined`, and for SELinux it will likely be `container_runtime_t`. Runc has not conducted in-depth testing of the impact on SELinux -- it is possible that it provides some reasonable protection but it seems likely that an attacker could cause harm to systems even with such an SELinux setup.\n\n * For the more involved redirect and write gadget attacks, unfortunately most LSM profiles (including the standard container-selinux profiles) provide the container runtime access to sysctl files (including `/proc/sysrq-trigger`) and so LSMs likely do not provide much protection against these attacks.\n\n * Using rootless containers provides some protection against these kinds of bugs (privileged writes in runc being redirected) -- by having runc itself be an unprivileged process, in general you would expect the impact scope of a runc bug to be less severe as it would only have the privileges afforded to the host user which spawned runc. For this particular bug, the privilege escalation caused by the inadvertent write issue is entirely mitigated with rootless containers because the unprivileged user that the `runc` process is executing as cannot write to the aforementioned procfs files (even intentionally).\n\n### Other Runtimes ###\n\nAs this vulnerability boils down to a fairly easy-to-make logic bug, runc has provided information to other OCI (crun, youki) and non-OCI (LXC) container runtimes about this vulnerability.\n\nBased on discussions with other runtimes, it seems that crun and youki may have similar security issues and will release a co-ordinated security release along with runc. LXC appears to use the host\u0027s `/proc` for all procfs operations, and so is likely not vulnerable to this issue (this is a trade-off -- runc uses the container\u0027s procfs to avoid CVE-2016-9962-style attacks).\n\n[CVE-2016-9962]: https://seclists.org/fulldisclosure/2017/Jan/21\n\n### Credits ###\n\nThanks to Li Fubang (@lifubang from acmcoder.com, CIIC) and T\u00f5nis Tiigi (@tonistiigi from Docker) for both independently discovering this vulnerability, as well as Aleksa Sarai (@cyphar from SUSE) for the original research into this class of security issues and solutions.\n\nAdditional thanks go to T\u00f5nis Tiigi for finding some very useful exploit templates for these kinds of race attacks using `docker buildx build`.",
"id": "GHSA-cgrx-mc8f-2prm",
"modified": "2025-11-18T18:38:01Z",
"published": "2025-11-05T18:40:40Z",
"references": [
{
"type": "WEB",
"url": "https://github.com/opencontainers/runc/security/advisories/GHSA-qw9x-cqr3-wc7r"
},
{
"type": "WEB",
"url": "https://github.com/opencontainers/runc/security/advisories/GHSA-fh74-hm69-rqjw"
},
{
"type": "WEB",
"url": "https://github.com/opencontainers/runc/security/advisories/GHSA-cgrx-mc8f-2prm"
},
{
"type": "WEB",
"url": "https://github.com/opencontainers/runc/security/advisories/GHSA-9493-h29p-rfm2"
},
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-52881"
},
{
"type": "WEB",
"url": "https://github.com/opencontainers/selinux/pull/237"
},
{
"type": "WEB",
"url": "https://github.com/opencontainers/runc/commit/ff94f9991bd32076c871ef0ad8bc1b763458e480"
},
{
"type": "WEB",
"url": "https://github.com/opencontainers/runc/commit/ff6fe1324663538167eca8b3d3eec61e1bd4fa51"
},
{
"type": "WEB",
"url": "https://github.com/opencontainers/runc/commit/fdcc9d3cad2f85954a241ccb910a61aaa1ef47f3"
},
{
"type": "WEB",
"url": "https://github.com/opencontainers/runc/commit/ed6b1693b8b3ae7eb0250a7e76fc888cdacf98c1"
},
{
"type": "WEB",
"url": "https://github.com/opencontainers/runc/commit/db19bbed5348847da433faa9d69e9f90192bfa64"
},
{
"type": "WEB",
"url": "https://github.com/opencontainers/runc/commit/d61fd29d854b416feaaf128bf650325cd2182165"
},
{
"type": "WEB",
"url": "https://github.com/opencontainers/runc/commit/d40b3439a9614a86e87b81a94c6811ec6fa2d7d2"
},
{
"type": "WEB",
"url": "https://github.com/opencontainers/runc/commit/b3dd1bc562ed9996d1a0f249e056c16624046d28"
},
{
"type": "WEB",
"url": "https://github.com/opencontainers/runc/commit/a41366e74080fa9f26a2cd3544e2801449697322"
},
{
"type": "WEB",
"url": "https://github.com/opencontainers/runc/commit/77d217c7c3775d8ca5af89e477e81568ef4572db"
},
{
"type": "WEB",
"url": "https://github.com/opencontainers/runc/commit/77889b56db939c323d29d1130f28f9aea2edb544"
},
{
"type": "WEB",
"url": "https://github.com/opencontainers/runc/commit/6fc191449109ea14bb7d61238f24a33fe08c651f"
},
{
"type": "WEB",
"url": "https://github.com/opencontainers/runc/commit/4b37cd93f86e72feac866442988b549b5b7bf3e6"
},
{
"type": "WEB",
"url": "https://github.com/opencontainers/runc/commit/44a0fcf685db051c80b8c269812bb177f5802c58"
},
{
"type": "WEB",
"url": "https://github.com/opencontainers/runc/commit/435cc81be6b79cdec73b4002c0dae549b2f6ae6d"
},
{
"type": "WEB",
"url": "https://github.com/opencontainers/runc/commit/3f925525b44d247e390e529e772a0dc0c0bc3557"
},
{
"type": "WEB",
"url": "https://youtu.be/tGseJW_uBB8"
},
{
"type": "WEB",
"url": "https://pkg.go.dev/github.com/cyphar/filepath-securejoin/pathrs-lite/procfs"
},
{
"type": "WEB",
"url": "https://youtu.be/y1PaBzxwRWQ"
},
{
"type": "WEB",
"url": "https://github.com/opencontainers/selinux/releases/tag/v1.13.0"
},
{
"type": "WEB",
"url": "https://github.com/opencontainers/runc/blob/v1.4.0-rc.2/RELEASES.md"
},
{
"type": "PACKAGE",
"url": "https://github.com/opencontainers/runc"
},
{
"type": "WEB",
"url": "http://github.com/opencontainers/runc/commit/a41366e74080fa9f26a2cd3544e2801449697322"
},
{
"type": "WEB",
"url": "http://github.com/opencontainers/runc/commit/fdcc9d3cad2f85954a241ccb910a61aaa1ef47f3"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:A/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H",
"type": "CVSS_V4"
}
],
"summary": "runc container escape and denial of service due to arbitrary write gadgets and procfs write redirects"
}
GHSA-M6HQ-P25P-FFR2
Vulnerability from github – Published: 2025-11-06 23:32 – Updated: 2025-11-07 16:42
VLAI?
Summary
containerd CRI server: Host memory exhaustion through Attach goroutine leak
Details
Impact
A bug was found in containerd's CRI Attach implementation where a user can exhaust memory on the host due to goroutine leaks.
Repetitive calls of CRI Attach (e.g., kubectl attach) could increase the memory usage of containerd.
Patches
This bug has been fixed in the following containerd versions:
- 2.2.0
- 2.1.5
- 2.0.7
- 1.7.29
Users should update to these versions to resolve the issue.
Workarounds
Set up an admission controller to control accesses to pods/attach resources.
e.g., Validating Admission Policy.
Credits
The containerd project would like to thank @Wheat2018 for responsibly disclosing this issue in accordance with the containerd security policy.
References
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2025-64329
For more information
If you have any questions or comments about this advisory:
- Open an issue in containerd
- Email us at security@containerd.io
To report a security issue in containerd:
Severity ?
{
"affected": [
{
"package": {
"ecosystem": "Go",
"name": "github.com/containerd/containerd"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "1.7.29"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"package": {
"ecosystem": "Go",
"name": "github.com/containerd/containerd/v2"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "2.0.7"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"package": {
"ecosystem": "Go",
"name": "github.com/containerd/containerd/v2"
},
"ranges": [
{
"events": [
{
"introduced": "2.1.0-beta.0"
},
{
"fixed": "2.1.5"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"package": {
"ecosystem": "Go",
"name": "github.com/containerd/containerd/v2"
},
"ranges": [
{
"events": [
{
"introduced": "2.2.0-beta.0"
},
{
"fixed": "2.2.0"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2025-64329"
],
"database_specific": {
"cwe_ids": [
"CWE-401"
],
"github_reviewed": true,
"github_reviewed_at": "2025-11-06T23:32:23Z",
"nvd_published_at": "2025-11-07T05:16:08Z",
"severity": "MODERATE"
},
"details": "### Impact\n\nA bug was found in containerd\u0027s CRI Attach implementation where a user can exhaust memory on the host due to goroutine leaks. \n\nRepetitive calls of CRI Attach (e.g., [`kubectl attach`](https://kubernetes.io/docs/reference/kubectl/generated/kubectl_attach/)) could increase the memory usage of containerd.\n\n### Patches\n\nThis bug has been fixed in the following containerd versions:\n\n* 2.2.0\n* 2.1.5\n* 2.0.7\n* 1.7.29\n\nUsers should update to these versions to resolve the issue.\n\n### Workarounds\n\nSet up an admission controller to control accesses to `pods/attach` resources.\ne.g., [Validating Admission Policy](https://kubernetes.io/docs/reference/access-authn-authz/validating-admission-policy/).\n\n### Credits\n\nThe containerd project would like to thank @Wheat2018 for responsibly disclosing this issue in accordance with the [containerd security policy](https://github.com/containerd/project/blob/main/SECURITY.md).\n\n### References\n\nhttps://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2025-64329\n\n### For more information\n\nIf you have any questions or comments about this advisory:\n\n* Open an issue in [containerd](https://github.com/containerd/containerd/issues/new/choose)\n* Email us at [security@containerd.io](mailto:security@containerd.io)\n\nTo report a security issue in containerd:\n\n* [Report a new vulnerability](https://github.com/containerd/containerd/security/advisories/new)",
"id": "GHSA-m6hq-p25p-ffr2",
"modified": "2025-11-07T16:42:55Z",
"published": "2025-11-06T23:32:23Z",
"references": [
{
"type": "WEB",
"url": "https://github.com/containerd/containerd/security/advisories/GHSA-m6hq-p25p-ffr2"
},
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-64329"
},
{
"type": "WEB",
"url": "https://github.com/containerd/containerd/commit/083b53cd6f19b5de7717b0ce92c11bdf95e612df"
},
{
"type": "PACKAGE",
"url": "https://github.com/containerd/containerd"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
"type": "CVSS_V4"
}
],
"summary": "containerd CRI server: Host memory exhaustion through Attach goroutine leak"
}
GHSA-PWHC-RPQ9-4C8W
Vulnerability from github – Published: 2025-11-06 15:12 – Updated: 2025-11-06 23:12
VLAI?
Summary
containerd affected by a local privilege escalation via wide permissions on CRI directory
Details
Impact
An overly broad default permission vulnerability was found in containerd.
/var/lib/containerdwas created with the permission bits 0o711, while it should be created with 0o700- Allowed local users on the host to potentially access the metadata store and the content store
/run/containerd/io.containerd.grpc.v1.criwas created with 0o755, while it should be created with 0o700- Allowed local users on the host to potentially access the contents of Kubernetes local volumes. The contents of volumes might include setuid binaries, which could allow a local user on the host to elevate privileges on the host.
/run/containerd/io.containerd.sandbox.controller.v1.shimwas created with 0o711, while it should be created with 0o700
The directory paths may differ depending on the daemon configuration.
When the temp directory path is specified in the daemon configuration, that directory was also created with 0o711, while it should be created with 0o700.
Patches
This bug has been fixed in the following containerd versions:
- 2.2.0
- 2.1.5
- 2.0.7
- 1.7.29
Users should update to these versions to resolve the issue. These updates automatically change the permissions of the existing directories.
[!NOTE]
/run/containerdand/run/containerd/io.containerd.runtime.v2.taskare still created with 0o711. This is an expected behavior for supporting userns-remapped containers.
Workarounds
The system administrator on the host can manually chmod the directories to not have group or world accessible permisisons:
chmod 700 /var/lib/containerd
chmod 700 /run/containerd/io.containerd.grpc.v1.cri
chmod 700 /run/containerd/io.containerd.sandbox.controller.v1.shim
An alternative mitigation would be to run containerd in rootless mode.
Credits
The containerd project would like to thank David Leadbeater for responsibly disclosing this issue in accordance with the containerd security policy.
For more information
If you have any questions or comments about this advisory:
- Open an issue in containerd
- Email us at security@containerd.io
To report a security issue in containerd:
Severity ?
7.3 (High)
{
"affected": [
{
"package": {
"ecosystem": "Go",
"name": "github.com/containerd/containerd"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "1.7.29"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"package": {
"ecosystem": "Go",
"name": "github.com/containerd/containerd/v2"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "2.0.7"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"package": {
"ecosystem": "Go",
"name": "github.com/containerd/containerd/v2"
},
"ranges": [
{
"events": [
{
"introduced": "2.1.0-beta.0"
},
{
"fixed": "2.1.5"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"package": {
"ecosystem": "Go",
"name": "github.com/containerd/containerd/v2"
},
"ranges": [
{
"events": [
{
"introduced": "2.2.0-beta.0"
},
{
"fixed": "2.2.0"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2024-25621"
],
"database_specific": {
"cwe_ids": [
"CWE-279"
],
"github_reviewed": true,
"github_reviewed_at": "2025-11-06T15:12:08Z",
"nvd_published_at": "2025-11-06T19:15:40Z",
"severity": "HIGH"
},
"details": "### Impact\n\nAn overly broad default permission vulnerability was found in containerd.\n\n- `/var/lib/containerd` was created with the permission bits 0o711, while it should be created with 0o700\n - Allowed local users on the host to potentially access the metadata store and the content store\n- `/run/containerd/io.containerd.grpc.v1.cri` was created with 0o755, while it should be created with 0o700\n - Allowed local users on the host to potentially access the contents of Kubernetes local volumes. The contents of volumes might include setuid binaries, which could allow a local user on the host to elevate privileges on the host.\n- `/run/containerd/io.containerd.sandbox.controller.v1.shim` was created with 0o711, while it should be created with 0o700\n\nThe directory paths may differ depending on the daemon configuration.\nWhen the `temp` directory path is specified in the daemon configuration, that directory was also created with 0o711, while it should be created with 0o700.\n\n### Patches\n\nThis bug has been fixed in the following containerd versions:\n\n* 2.2.0\n* 2.1.5\n* 2.0.7\n* 1.7.29\n\nUsers should update to these versions to resolve the issue.\nThese updates automatically change the permissions of the existing directories.\n\n\u003e [!NOTE]\n\u003e\n\u003e `/run/containerd` and `/run/containerd/io.containerd.runtime.v2.task` are still created with 0o711.\n\u003e This is an expected behavior for supporting userns-remapped containers.\n\n### Workarounds\n\nThe system administrator on the host can manually chmod the directories to not \nhave group or world accessible permisisons:\n\n```\nchmod 700 /var/lib/containerd\nchmod 700 /run/containerd/io.containerd.grpc.v1.cri\nchmod 700 /run/containerd/io.containerd.sandbox.controller.v1.shim\n```\n\nAn alternative mitigation would be to run containerd in [rootless mode](https://github.com/containerd/containerd/blob/main/docs/rootless.md).\n\n### Credits\n\nThe containerd project would like to thank David Leadbeater for responsibly disclosing this issue in accordance with the [containerd security policy](https://github.com/containerd/project/blob/main/SECURITY.md).\n\n### For more information\n\nIf you have any questions or comments about this advisory:\n\n* Open an issue in [containerd](https://github.com/containerd/containerd/issues/new/choose)\n* Email us at [security@containerd.io](mailto:security@containerd.io)\n\nTo report a security issue in containerd:\n\n* [Report a new vulnerability](https://github.com/containerd/containerd/security/advisories/new)",
"id": "GHSA-pwhc-rpq9-4c8w",
"modified": "2025-11-06T23:12:26Z",
"published": "2025-11-06T15:12:08Z",
"references": [
{
"type": "WEB",
"url": "https://github.com/containerd/containerd/security/advisories/GHSA-pwhc-rpq9-4c8w"
},
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-25621"
},
{
"type": "WEB",
"url": "https://github.com/containerd/containerd/commit/7c59e8e9e970d38061a77b586b23655c352bfec5"
},
{
"type": "PACKAGE",
"url": "https://github.com/containerd/containerd"
},
{
"type": "WEB",
"url": "https://github.com/containerd/containerd/blob/main/docs/rootless.md"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
],
"summary": "containerd affected by a local privilege escalation via wide permissions on CRI directory"
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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