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6 vulnerabilities found for crun by containers
CVE-2026-47766 (GCVE-0-2026-47766)
Vulnerability from nvd – Published: 2026-08-14 16:16 – Updated: 2026-08-14 16:32
VLAI
EPSS
VEX
Title
crun follows rootfs /dev symlink while creating default devices
Summary
crun is an open source OCI Container Runtime fully written in C. Prior to version 1.28, crun's default device setup opens the container rootfs `/dev` directory without `O_NOFOLLOW`. If an OCI bundle contains `rootfs/dev` as a symlink and the bundle configuration does not mount `/dev`, crun follows that symlink and creates the default device nodes and stdio symlinks at the symlink target outside the container rootfs. In a local rootful crun replay, this created fixed device nodes and symlinks outside the rootfs before crun returned failure. A pre-existing file named `ptmx` in the target directory was also replaced by crun's forced `ptmx -> pts/ptmx` symlink. Version 1.28 fixes the issue.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-14 16:32 UTC
CWE
- CWE-61 - UNIX Symbolic Link (Symlink) Following
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/containers/crun/security/advis… | x_refsource_CONFIRM |
| https://github.com/containers/crun/releases/tag/1.28 | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| containers | crun |
Affected:
< 1.28
|
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-47766",
"options": [
{
"Exploitation": "none"
},
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},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-08-14T16:32:07.749164Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-08-14T16:32:20.537Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"product": "crun",
"vendor": "containers",
"versions": [
{
"status": "affected",
"version": "\u003c 1.28"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "crun is an open source OCI Container Runtime fully written in C. Prior to version 1.28, crun\u0027s default device setup opens the container rootfs `/dev` directory without `O_NOFOLLOW`. If an OCI bundle contains `rootfs/dev` as a symlink and the bundle configuration does not mount `/dev`, crun follows that symlink and creates the default device nodes and stdio symlinks at the symlink target outside the container rootfs. In a local rootful crun replay, this created fixed device nodes and symlinks outside the rootfs before crun returned failure. A pre-existing file named `ptmx` in the target directory was also replaced by crun\u0027s forced `ptmx -\u003e pts/ptmx` symlink. Version 1.28 fixes the issue."
}
],
"metrics": [
{
"cvssV4_0": {
"attackComplexity": "LOW",
"attackRequirements": "NONE",
"attackVector": "LOCAL",
"baseScore": 5.1,
"baseSeverity": "MEDIUM",
"privilegesRequired": "NONE",
"subAvailabilityImpact": "NONE",
"subConfidentialityImpact": "NONE",
"subIntegrityImpact": "NONE",
"userInteraction": "NONE",
"vectorString": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N",
"version": "4.0",
"vulnAvailabilityImpact": "NONE",
"vulnConfidentialityImpact": "NONE",
"vulnIntegrityImpact": "LOW"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-61",
"description": "CWE-61: UNIX Symbolic Link (Symlink) Following",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-08-14T16:16:37.525Z",
"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"shortName": "GitHub_M"
},
"references": [
{
"name": "https://github.com/containers/crun/security/advisories/GHSA-7vwr-4279-7gq5",
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/containers/crun/security/advisories/GHSA-7vwr-4279-7gq5"
},
{
"name": "https://github.com/containers/crun/releases/tag/1.28",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/containers/crun/releases/tag/1.28"
}
],
"source": {
"advisory": "GHSA-7vwr-4279-7gq5",
"discovery": "UNKNOWN"
},
"title": "crun follows rootfs /dev symlink while creating default devices"
}
},
"cveMetadata": {
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"assignerShortName": "GitHub_M",
"cveId": "CVE-2026-47766",
"datePublished": "2026-08-14T16:16:37.525Z",
"dateReserved": "2026-05-19T22:36:16.882Z",
"dateUpdated": "2026-08-14T16:32:20.537Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
CVE-2026-30892 (GCVE-0-2026-30892)
Vulnerability from nvd – Published: 2026-03-25 23:57 – Updated: 2026-03-26 18:10
VLAI
EPSS
VEX
Title
Crun incorrectly parses `crun exec` option `-u`, leading to privilege escalation
Summary
crun is an open source OCI Container Runtime fully written in C. In versions 1.19 through 1.26, the `crun exec` option `-u` (`--user`) is incorrectly parsed. The value `1` is interpreted as UID 0 and GID 0 when it should have been UID 1 and GID 0. The process thus runs with higher privileges than expected. Version 1.27 patches the issue.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-03-26 18:09 UTC
CWE
- CWE-269 - Improper Privilege Management
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/containers/crun/security/advis… | x_refsource_CONFIRM |
| https://github.com/containers/crun/commit/1bd7f42… | x_refsource_MISC |
| https://github.com/containers/crun/releases/tag/1.27 | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| containers | crun |
Affected:
>= 1.19, < 1.27
|
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-30892",
"options": [
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},
{
"Automatable": "no"
},
{
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}
],
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"timestamp": "2026-03-26T18:09:51.829145Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-03-26T18:10:16.318Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"product": "crun",
"vendor": "containers",
"versions": [
{
"status": "affected",
"version": "\u003e= 1.19, \u003c 1.27"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "crun is an open source OCI Container Runtime fully written in C. In versions 1.19 through 1.26, the `crun exec` option `-u` (`--user`) is incorrectly parsed. The value `1` is interpreted as UID 0 and GID 0 when it should have been UID 1 and GID 0. The process thus runs with higher privileges than expected. Version 1.27 patches the issue."
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "NONE",
"baseScore": 0,
"baseSeverity": "NONE",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:N",
"version": "3.1"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-269",
"description": "CWE-269: Improper Privilege Management",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-03-25T23:57:01.741Z",
"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"shortName": "GitHub_M"
},
"references": [
{
"name": "https://github.com/containers/crun/security/advisories/GHSA-4vg2-xjqj-7chj",
"tags": [
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],
"url": "https://github.com/containers/crun/security/advisories/GHSA-4vg2-xjqj-7chj"
},
{
"name": "https://github.com/containers/crun/commit/1bd7f42446999b0e76bc3d575392e05c943b0b01",
"tags": [
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],
"url": "https://github.com/containers/crun/commit/1bd7f42446999b0e76bc3d575392e05c943b0b01"
},
{
"name": "https://github.com/containers/crun/releases/tag/1.27",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/containers/crun/releases/tag/1.27"
}
],
"source": {
"advisory": "GHSA-4vg2-xjqj-7chj",
"discovery": "UNKNOWN"
},
"title": "Crun incorrectly parses `crun exec` option `-u`, leading to privilege escalation"
}
},
"cveMetadata": {
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"assignerShortName": "GitHub_M",
"cveId": "CVE-2026-30892",
"datePublished": "2026-03-25T23:57:01.741Z",
"dateReserved": "2026-03-06T00:04:56.701Z",
"dateUpdated": "2026-03-26T18:10:16.318Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
CVE-2025-24965 (GCVE-0-2025-24965)
Vulnerability from nvd – Published: 2025-02-19 16:46 – Updated: 2025-02-19 16:56
VLAI
EPSS
VEX
Title
.krun_config.json symlink attack creates or overwrites file on the host in crun
Summary
crun is an open source OCI Container Runtime fully written in C. In affected versions A malicious container image could trick the krun handler into escaping the root filesystem, allowing file creation or modification on the host. No special permissions are needed, only the ability for the current user to write to the target file. The problem is fixed in crun 1.20 and all users are advised to upgrade. There are no known workarounds for this vulnerability.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-02-19 16:55 UTC
CWE
- CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/containers/crun/security/advis… | x_refsource_CONFIRM |
| https://github.com/containers/crun/commit/0aec82c… | x_refsource_MISC |
| https://github.com/containers/crun/releases/tag/1.20 | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| containers | crun |
Affected:
< 1.20
|
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2025-24965",
"options": [
{
"Exploitation": "poc"
},
{
"Automatable": "no"
},
{
"Technical Impact": "total"
}
],
"role": "CISA Coordinator",
"timestamp": "2025-02-19T16:55:57.068827Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2025-02-19T16:56:05.966Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
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"product": "crun",
"vendor": "containers",
"versions": [
{
"status": "affected",
"version": "\u003c 1.20"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "crun is an open source OCI Container Runtime fully written in C. In affected versions A malicious container image could trick the krun handler into escaping the root filesystem, allowing file creation or modification on the host. No special permissions are needed, only the ability for the current user to write to the target file. The problem is fixed in crun 1.20 and all users are advised to upgrade. There are no known workarounds for this vulnerability."
}
],
"metrics": [
{
"cvssV4_0": {
"attackComplexity": "LOW",
"attackRequirements": "NONE",
"attackVector": "NETWORK",
"baseScore": 8.5,
"baseSeverity": "HIGH",
"privilegesRequired": "LOW",
"subAvailabilityImpact": "NONE",
"subConfidentialityImpact": "NONE",
"subIntegrityImpact": "NONE",
"userInteraction": "PASSIVE",
"vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N",
"version": "4.0",
"vulnAvailabilityImpact": "NONE",
"vulnConfidentialityImpact": "HIGH",
"vulnIntegrityImpact": "HIGH"
}
}
],
"problemTypes": [
{
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{
"cweId": "CWE-22",
"description": "CWE-22: Improper Limitation of a Pathname to a Restricted Directory (\u0027Path Traversal\u0027)",
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"type": "CWE"
}
]
}
],
"providerMetadata": {
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"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"shortName": "GitHub_M"
},
"references": [
{
"name": "https://github.com/containers/crun/security/advisories/GHSA-f42g-r5jj-qh4j",
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/containers/crun/security/advisories/GHSA-f42g-r5jj-qh4j"
},
{
"name": "https://github.com/containers/crun/commit/0aec82c2b686f0b1793deed43b46524fe2e8b5a7",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/containers/crun/commit/0aec82c2b686f0b1793deed43b46524fe2e8b5a7"
},
{
"name": "https://github.com/containers/crun/releases/tag/1.20",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/containers/crun/releases/tag/1.20"
}
],
"source": {
"advisory": "GHSA-f42g-r5jj-qh4j",
"discovery": "UNKNOWN"
},
"title": ".krun_config.json symlink attack creates or overwrites file on the host in crun"
}
},
"cveMetadata": {
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"assignerShortName": "GitHub_M",
"cveId": "CVE-2025-24965",
"datePublished": "2025-02-19T16:46:31.602Z",
"dateReserved": "2025-01-29T15:18:03.209Z",
"dateUpdated": "2025-02-19T16:56:05.966Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.1"
}
CVE-2026-47766 (GCVE-0-2026-47766)
Vulnerability from cvelistv5 – Published: 2026-08-14 16:16 – Updated: 2026-08-14 16:32
VLAI
EPSS
VEX
Title
crun follows rootfs /dev symlink while creating default devices
Summary
crun is an open source OCI Container Runtime fully written in C. Prior to version 1.28, crun's default device setup opens the container rootfs `/dev` directory without `O_NOFOLLOW`. If an OCI bundle contains `rootfs/dev` as a symlink and the bundle configuration does not mount `/dev`, crun follows that symlink and creates the default device nodes and stdio symlinks at the symlink target outside the container rootfs. In a local rootful crun replay, this created fixed device nodes and symlinks outside the rootfs before crun returned failure. A pre-existing file named `ptmx` in the target directory was also replaced by crun's forced `ptmx -> pts/ptmx` symlink. Version 1.28 fixes the issue.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-14 16:32 UTC
CWE
- CWE-61 - UNIX Symbolic Link (Symlink) Following
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/containers/crun/security/advis… | x_refsource_CONFIRM |
| https://github.com/containers/crun/releases/tag/1.28 | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| containers | crun |
Affected:
< 1.28
|
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-47766",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-08-14T16:32:07.749164Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
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"providerMetadata": {
"dateUpdated": "2026-08-14T16:32:20.537Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"product": "crun",
"vendor": "containers",
"versions": [
{
"status": "affected",
"version": "\u003c 1.28"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "crun is an open source OCI Container Runtime fully written in C. Prior to version 1.28, crun\u0027s default device setup opens the container rootfs `/dev` directory without `O_NOFOLLOW`. If an OCI bundle contains `rootfs/dev` as a symlink and the bundle configuration does not mount `/dev`, crun follows that symlink and creates the default device nodes and stdio symlinks at the symlink target outside the container rootfs. In a local rootful crun replay, this created fixed device nodes and symlinks outside the rootfs before crun returned failure. A pre-existing file named `ptmx` in the target directory was also replaced by crun\u0027s forced `ptmx -\u003e pts/ptmx` symlink. Version 1.28 fixes the issue."
}
],
"metrics": [
{
"cvssV4_0": {
"attackComplexity": "LOW",
"attackRequirements": "NONE",
"attackVector": "LOCAL",
"baseScore": 5.1,
"baseSeverity": "MEDIUM",
"privilegesRequired": "NONE",
"subAvailabilityImpact": "NONE",
"subConfidentialityImpact": "NONE",
"subIntegrityImpact": "NONE",
"userInteraction": "NONE",
"vectorString": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N",
"version": "4.0",
"vulnAvailabilityImpact": "NONE",
"vulnConfidentialityImpact": "NONE",
"vulnIntegrityImpact": "LOW"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-61",
"description": "CWE-61: UNIX Symbolic Link (Symlink) Following",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-08-14T16:16:37.525Z",
"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"shortName": "GitHub_M"
},
"references": [
{
"name": "https://github.com/containers/crun/security/advisories/GHSA-7vwr-4279-7gq5",
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/containers/crun/security/advisories/GHSA-7vwr-4279-7gq5"
},
{
"name": "https://github.com/containers/crun/releases/tag/1.28",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/containers/crun/releases/tag/1.28"
}
],
"source": {
"advisory": "GHSA-7vwr-4279-7gq5",
"discovery": "UNKNOWN"
},
"title": "crun follows rootfs /dev symlink while creating default devices"
}
},
"cveMetadata": {
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"assignerShortName": "GitHub_M",
"cveId": "CVE-2026-47766",
"datePublished": "2026-08-14T16:16:37.525Z",
"dateReserved": "2026-05-19T22:36:16.882Z",
"dateUpdated": "2026-08-14T16:32:20.537Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
CVE-2026-30892 (GCVE-0-2026-30892)
Vulnerability from cvelistv5 – Published: 2026-03-25 23:57 – Updated: 2026-03-26 18:10
VLAI
EPSS
VEX
Title
Crun incorrectly parses `crun exec` option `-u`, leading to privilege escalation
Summary
crun is an open source OCI Container Runtime fully written in C. In versions 1.19 through 1.26, the `crun exec` option `-u` (`--user`) is incorrectly parsed. The value `1` is interpreted as UID 0 and GID 0 when it should have been UID 1 and GID 0. The process thus runs with higher privileges than expected. Version 1.27 patches the issue.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-03-26 18:09 UTC
CWE
- CWE-269 - Improper Privilege Management
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/containers/crun/security/advis… | x_refsource_CONFIRM |
| https://github.com/containers/crun/commit/1bd7f42… | x_refsource_MISC |
| https://github.com/containers/crun/releases/tag/1.27 | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| containers | crun |
Affected:
>= 1.19, < 1.27
|
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
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CVE-2025-24965 (GCVE-0-2025-24965)
Vulnerability from cvelistv5 – Published: 2025-02-19 16:46 – Updated: 2025-02-19 16:56
VLAI
EPSS
VEX
Title
.krun_config.json symlink attack creates or overwrites file on the host in crun
Summary
crun is an open source OCI Container Runtime fully written in C. In affected versions A malicious container image could trick the krun handler into escaping the root filesystem, allowing file creation or modification on the host. No special permissions are needed, only the ability for the current user to write to the target file. The problem is fixed in crun 1.20 and all users are advised to upgrade. There are no known workarounds for this vulnerability.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-02-19 16:55 UTC
CWE
- CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/containers/crun/security/advis… | x_refsource_CONFIRM |
| https://github.com/containers/crun/commit/0aec82c… | x_refsource_MISC |
| https://github.com/containers/crun/releases/tag/1.20 | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| containers | crun |
Affected:
< 1.20
|
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