RHSA-2026:61884
Vulnerability from csaf_redhat - Published: 2026-09-01 05:42 - Updated: 2026-10-31 08:46Summary
Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update
Severity
Important
Notes
Topic: An update for Red Hat Hardened Images RPMs is now available.
Details: This update includes the following RPMs:
valkey:
* valkey-9.0.6-0.1.hum1 (aarch64, x86_64)
* valkey-compat-redis-9.0.6-0.1.hum1 (noarch)
* valkey-compat-redis-devel-9.0.6-0.1.hum1 (noarch)
* valkey-devel-9.0.6-0.1.hum1 (aarch64, x86_64)
* valkey-doc-9.0.6-0.1.hum1 (noarch)
* valkey-rdma-9.0.6-0.1.hum1 (aarch64, x86_64)
* valkey-9.0.6-0.1.hum1.src (src)
Terms of Use: This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.
A flaw was found in Valkey. An authenticated client can trigger a `CLIENT KILL` command while the `tlsProcessPendingData` function iterates a pending list. This action causes `connTLSClose` to delete the iterator's cached next node, leading to a use-after-free vulnerability. This flaw, when Transport Layer Security (TLS) is enabled, may result in a server crash or potentially allow a remote attacker to achieve arbitrary code execution.
7.5 (High)
Affected products
Fixed
13 products
| Product | Identifier | Version | Remediation |
|---|---|---|---|
| Unresolved product id: Red Hat Hardened Images:valkey-0:9.0.6-0.1.hum1@aarch64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: Red Hat Hardened Images:valkey-0:9.0.6-0.1.hum1@src | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: Red Hat Hardened Images:valkey-0:9.0.6-0.1.hum1@x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: Red Hat Hardened Images:valkey-compat-redis-0:9.0.6-0.1.hum1@noarch@public-hummingbird-aarch64-rpms | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: Red Hat Hardened Images:valkey-compat-redis-0:9.0.6-0.1.hum1@noarch@public-hummingbird-x86_64-rpms | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: Red Hat Hardened Images:valkey-compat-redis-devel-0:9.0.6-0.1.hum1@noarch@public-hummingbird-aarch64-rpms | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: Red Hat Hardened Images:valkey-compat-redis-devel-0:9.0.6-0.1.hum1@noarch@public-hummingbird-x86_64-rpms | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: Red Hat Hardened Images:valkey-devel-0:9.0.6-0.1.hum1@aarch64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: Red Hat Hardened Images:valkey-devel-0:9.0.6-0.1.hum1@x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: Red Hat Hardened Images:valkey-doc-0:9.0.6-0.1.hum1@noarch@public-hummingbird-aarch64-rpms | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: Red Hat Hardened Images:valkey-doc-0:9.0.6-0.1.hum1@noarch@public-hummingbird-x86_64-rpms | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: Red Hat Hardened Images:valkey-rdma-0:9.0.6-0.1.hum1@aarch64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: Red Hat Hardened Images:valkey-rdma-0:9.0.6-0.1.hum1@x86_64 | — |
Vendor Fix
fix
Workaround
|
Threats
Impact
Important
A flaw was found in Valkey, a distributed key-value database. A remote attacker could exploit a use-after-free vulnerability in the RESTORE command. This occurs when a malformed data stream is processed during stream deserialization, causing a shared resource to be improperly managed. If successfully exploited, this flaw could lead to remote code execution.
8.8 (High)
Affected products
Fixed
13 products, the same list as for
CVE-2026-56684
Threats
Impact
Important
A flaw was found in Valkey. A use-after-free vulnerability exists within the `handleClientsBlockedOnKey` function of the Blocked-on-keys Subsystem. A remote attacker could exploit this flaw, leading to a denial of service. The complexity of exploiting this vulnerability is high.
CWE-825 - Expired Pointer DereferenceAffected products
Fixed
13 products, the same list as for
CVE-2026-56684
Threats
Impact
Low
A flaw was found in valkey-io valkey. A remote attacker could exploit a double free vulnerability in the `moduleTimerHandler` function within the Module Timer subsystem (src/module.c). This flaw could lead to a denial of service.
4.9 (Medium)
Affected products
Fixed
13 products, the same list as for
CVE-2026-56684
Threats
Impact
Moderate
A flaw was found in the Slot Migration component of Valkey. A remote attacker can exploit an out-of-bounds read vulnerability in the `createSlotImportJob` function by manipulating the `job_name` argument. This can lead to a denial of service, making the affected system unavailable.
7.5 (High)
Affected products
Fixed
13 products, the same list as for
CVE-2026-56684
Threats
Impact
Important
A flaw was found in Valkey. An out-of-bounds read vulnerability exists in the `kvstoreGetHashtable` function within `src/kvstore.c`. This issue can be exploited by a remote attacker in cluster mode by providing a specially crafted `dump.rdb` file during application startup, for example, through data directory write access or a malicious replication feed. Successful exploitation could lead to a Denial of Service (DoS) during the application's boot process.
CWE-125 - Out-of-bounds ReadAffected products
Fixed
13 products, the same list as for
CVE-2026-56684
Threats
Impact
Low
References
81 references
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"details": "To mitigate this issue, restrict network access to the Valkey instance to only trusted clients and networks. This limits an attacker\u0027s ability to send malformed RDB stream payloads to the RESTORE command. Implement firewall rules to block unauthorized access to the Valkey port.",
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{
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},
{
"cve": "CVE-2026-82631",
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"id": "CWE-825",
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"title": "Vulnerability description"
},
{
"category": "summary",
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{
"category": "external",
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{
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"id": "CWE-1341",
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"ids": [
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],
"notes": [
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"category": "description",
"text": "A flaw was found in valkey-io valkey. A remote attacker could exploit a double free vulnerability in the `moduleTimerHandler` function within the Module Timer subsystem (src/module.c). This flaw could lead to a denial of service.",
"title": "Vulnerability description"
},
{
"category": "summary",
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},
{
"category": "other",
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"title": "Statement"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
],
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"title": "valkey: Valkey: Denial of Service via double free in Module Timer subsystem"
},
{
"cve": "CVE-2026-85522",
"cwe": {
"id": "CWE-125",
"name": "Out-of-bounds Read"
},
"discovery_date": "2026-09-04T13:51:07.879748+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2528500"
}
],
"notes": [
{
"category": "description",
"text": "A flaw was found in the Slot Migration component of Valkey. A remote attacker can exploit an out-of-bounds read vulnerability in the `createSlotImportJob` function by manipulating the `job_name` argument. This can lead to a denial of service, making the affected system unavailable.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "valkey: Valkey: Remote out-of-bounds read in Slot Migration can lead to denial of service",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "An out-of-bounds read vulnerability was found in Valkey\u0027s Slot Migration component within the createSlotImportJob function in src/cluster_migrateslots.c. A remote attacker can trigger this flaw by manipulating the job_name argument during slot migration operations. Under default Red Hat configurations, this out-of-bounds memory read triggers a segmentation fault that crashes the Valkey daemon, resulting in a denial of service. The process is constrained by the unprivileged valkey service account and standard SELinux policies, preventing arbitrary code execution or host-level compromise.",
"title": "Statement"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
],
"product_status": {
"fixed": [
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},
"references": [
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"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2026-85522"
},
{
"category": "external",
"summary": "RHBZ#2528500",
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},
{
"category": "external",
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{
"category": "external",
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"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-85522"
},
{
"category": "external",
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{
"category": "external",
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{
"category": "external",
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{
"category": "external",
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{
"category": "external",
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{
"category": "external",
"summary": "https://vuldb.com/submit/895119",
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{
"category": "external",
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{
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],
"release_date": "2026-09-04T13:45:15.397000+00:00",
"remediations": [
{
"category": "vendor_fix",
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"details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\nhttps://images.redhat.com/",
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],
"restart_required": {
"category": "none"
},
"url": "https://access.redhat.com/errata/RHSA-2026:61884"
},
{
"category": "workaround",
"details": "Restrict access to the Valkey cluster communication port using network firewalls so only trusted cluster nodes can interact with the migration interface. Additionally, configure Valkey ACLs to restrict untrusted clients from invoking cluster migration commands.",
"product_ids": [
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]
}
],
"scores": [
{
"cvss_v3": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 7.5,
"baseSeverity": "HIGH",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"version": "3.1"
},
"products": [
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]
}
],
"threats": [
{
"category": "impact",
"details": "Important"
}
],
"title": "valkey: Valkey: Remote out-of-bounds read in Slot Migration can lead to denial of service"
},
{
"cve": "CVE-2026-86227",
"cwe": {
"id": "CWE-125",
"name": "Out-of-bounds Read"
},
"discovery_date": "2026-09-06T22:30:56.326782+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2529241"
}
],
"notes": [
{
"category": "description",
"text": "A flaw was found in Valkey. An out-of-bounds read vulnerability exists in the `kvstoreGetHashtable` function within `src/kvstore.c`. This issue can be exploited by a remote attacker in cluster mode by providing a specially crafted `dump.rdb` file during application startup, for example, through data directory write access or a malicious replication feed. Successful exploitation could lead to a Denial of Service (DoS) during the application\u0027s boot process.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "valkey: Valkey: Denial of Service due to out-of-bounds read",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "This vulnerability is rated as Low severity because successful exploitation requires Valkey to operate with clustering enabled and ingest a manipulated database snapshot during startup, restricting the blast radius to a denial of service at boot. Default and recommended deployment practices do not grant untrusted users write permissions to persistent storage directories or access to replication feeds. Because significant preconditions must be satisfied and the failure does not compromise data confidentiality or integrity, the overall risk to Red Hat environments is minimal.",
"title": "Statement"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
],
"product_status": {
"fixed": [
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]
},
"references": [
{
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"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2026-86227"
},
{
"category": "external",
"summary": "RHBZ#2529241",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2529241"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2026-86227",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-86227"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-86227",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-86227"
},
{
"category": "external",
"summary": "https://github.com/user-attachments/files/30195539/RDB.zip",
"url": "https://github.com/user-attachments/files/30195539/RDB.zip"
},
{
"category": "external",
"summary": "https://github.com/valkey-io/valkey/",
"url": "https://github.com/valkey-io/valkey/"
},
{
"category": "external",
"summary": "https://github.com/valkey-io/valkey/commit/4691888e7fab3df128f0bde5750c9fde2ae552fa",
"url": "https://github.com/valkey-io/valkey/commit/4691888e7fab3df128f0bde5750c9fde2ae552fa"
},
{
"category": "external",
"summary": "https://github.com/valkey-io/valkey/issues/4222",
"url": "https://github.com/valkey-io/valkey/issues/4222"
},
{
"category": "external",
"summary": "https://github.com/valkey-io/valkey/pull/4229",
"url": "https://github.com/valkey-io/valkey/pull/4229"
},
{
"category": "external",
"summary": "https://vuldb.com/cve/CVE-2026-86227",
"url": "https://vuldb.com/cve/CVE-2026-86227"
},
{
"category": "external",
"summary": "https://vuldb.com/submit/897659",
"url": "https://vuldb.com/submit/897659"
},
{
"category": "external",
"summary": "https://vuldb.com/vuln/399380",
"url": "https://vuldb.com/vuln/399380"
},
{
"category": "external",
"summary": "https://vuldb.com/vuln/399380/cti",
"url": "https://vuldb.com/vuln/399380/cti"
}
],
"release_date": "2026-09-06T22:15:13.103000+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2026-09-01T05:42:50+00:00",
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"threats": [
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],
"title": "valkey: Valkey: Denial of Service due to out-of-bounds read"
}
]
}
Loading…
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Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.
Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
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.
Vulnerability timeline
Sightings and recorded dates, grouped by day · UTC
How durations are calculated
Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.
Each result shows its source dates. A negative interval means the end event came first; when date-only inputs leave the order open, the result says so. Date-only inputs are approximate. The earliest evidence wins: KEV report dates and sightings are labelled as such. Records describing another vulnerability are listed but never calculated from, and a PoC alone does not establish exploitation. Missing patch evidence does not prove that no patch exists. Filters below change the event list only.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.