RHSA-2026:64796
Vulnerability from csaf_redhat - Published: 2026-09-08 05:14 - Updated: 2026-09-08 11:35Summary
Red Hat Security Advisory: valkey security, bug fix, and enhancement update
Severity
Important
Notes
Topic: An update for valkey is now available for Red Hat Enterprise Linux 10.
Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.
Details: Valkey is an advanced key-value store. It is often referred to as a data structure server since keys can contain strings, hashes, lists, sets and sorted sets. You can run atomic operations on these types, like appending to a string; incrementing the value in a hash; pushing to a list; computing set intersection, union and difference; or getting the member with highest ranking in a sorted set. In order to achieve its outstanding performance, Valkey works with an in-memory dataset. Depending on your use case, you can persist it either by dumping the dataset to disk every once in a while, or by appending each command to a log. Valkey also supports trivial-to-setup master-slave replication, with very fast non-blocking first synchronization, auto-reconnection on net split and so forth. Other features include Transactions, Pub/Sub, Lua scripting, Keys with a limited time-to-live, and configuration settings to make Valkey behave like a cache. You can use Valkey from most programming languages also.
Security Fix(es):
* redis: Redis: Remote Code Execution via specially crafted RESTORE payload (CVE-2026-66373)
* valkey: Valkey: Remote code execution via use-after-free in stream deserialization (CVE-2026-63639)
* valkey: Valkey: Remote code execution via TLS pending-data processing use-after-free (CVE-2026-56684)
Bug Fix(es) and Enhancement(s):
* [Tracker] Rebase valkey to 8.0.10 (JIRA:RHEL-216776)
For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
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
17 products
| Product | Identifier | Version | Remediation |
|---|---|---|---|
| Unresolved product id: AppStream-10.2.Z:valkey-0:8.0.11-1.el10_2.aarch64 | — |
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| Unresolved product id: AppStream-10.2.Z:valkey-0:8.0.11-1.el10_2.ppc64le | — |
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| Unresolved product id: AppStream-10.2.Z:valkey-0:8.0.11-1.el10_2.s390x | — |
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| Unresolved product id: AppStream-10.2.Z:valkey-0:8.0.11-1.el10_2.src | — |
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| Unresolved product id: AppStream-10.2.Z:valkey-0:8.0.11-1.el10_2.x86_64 | — |
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| Unresolved product id: AppStream-10.2.Z:valkey-debuginfo-0:8.0.11-1.el10_2.aarch64 | — |
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| Unresolved product id: AppStream-10.2.Z:valkey-debuginfo-0:8.0.11-1.el10_2.ppc64le | — |
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| Unresolved product id: AppStream-10.2.Z:valkey-debuginfo-0:8.0.11-1.el10_2.s390x | — |
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| Unresolved product id: AppStream-10.2.Z:valkey-debuginfo-0:8.0.11-1.el10_2.x86_64 | — |
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| Unresolved product id: AppStream-10.2.Z:valkey-debugsource-0:8.0.11-1.el10_2.aarch64 | — |
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| Unresolved product id: AppStream-10.2.Z:valkey-debugsource-0:8.0.11-1.el10_2.ppc64le | — |
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| Unresolved product id: AppStream-10.2.Z:valkey-debugsource-0:8.0.11-1.el10_2.s390x | — |
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| Unresolved product id: AppStream-10.2.Z:valkey-debugsource-0:8.0.11-1.el10_2.x86_64 | — |
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| Unresolved product id: AppStream-10.2.Z:valkey-devel-0:8.0.11-1.el10_2.aarch64 | — |
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| Unresolved product id: AppStream-10.2.Z:valkey-devel-0:8.0.11-1.el10_2.ppc64le | — |
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| Unresolved product id: AppStream-10.2.Z:valkey-devel-0:8.0.11-1.el10_2.s390x | — |
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| Unresolved product id: AppStream-10.2.Z:valkey-devel-0:8.0.11-1.el10_2.x86_64 | — |
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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
17 products
| Product | Identifier | Version | Remediation |
|---|---|---|---|
| Unresolved product id: AppStream-10.2.Z:valkey-0:8.0.11-1.el10_2.aarch64 | — |
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fix
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| Unresolved product id: AppStream-10.2.Z:valkey-0:8.0.11-1.el10_2.ppc64le | — |
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| Unresolved product id: AppStream-10.2.Z:valkey-0:8.0.11-1.el10_2.s390x | — |
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| Unresolved product id: AppStream-10.2.Z:valkey-0:8.0.11-1.el10_2.src | — |
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| Unresolved product id: AppStream-10.2.Z:valkey-0:8.0.11-1.el10_2.x86_64 | — |
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| Unresolved product id: AppStream-10.2.Z:valkey-debuginfo-0:8.0.11-1.el10_2.aarch64 | — |
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| Unresolved product id: AppStream-10.2.Z:valkey-debuginfo-0:8.0.11-1.el10_2.ppc64le | — |
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| Unresolved product id: AppStream-10.2.Z:valkey-debuginfo-0:8.0.11-1.el10_2.s390x | — |
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| Unresolved product id: AppStream-10.2.Z:valkey-debuginfo-0:8.0.11-1.el10_2.x86_64 | — |
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| Unresolved product id: AppStream-10.2.Z:valkey-debugsource-0:8.0.11-1.el10_2.aarch64 | — |
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| Unresolved product id: AppStream-10.2.Z:valkey-debugsource-0:8.0.11-1.el10_2.ppc64le | — |
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fix
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| Unresolved product id: AppStream-10.2.Z:valkey-debugsource-0:8.0.11-1.el10_2.s390x | — |
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fix
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| Unresolved product id: AppStream-10.2.Z:valkey-debugsource-0:8.0.11-1.el10_2.x86_64 | — |
Vendor Fix
fix
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| Unresolved product id: AppStream-10.2.Z:valkey-devel-0:8.0.11-1.el10_2.aarch64 | — |
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fix
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| Unresolved product id: AppStream-10.2.Z:valkey-devel-0:8.0.11-1.el10_2.ppc64le | — |
Vendor Fix
fix
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| Unresolved product id: AppStream-10.2.Z:valkey-devel-0:8.0.11-1.el10_2.s390x | — |
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| Unresolved product id: AppStream-10.2.Z:valkey-devel-0:8.0.11-1.el10_2.x86_64 | — |
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Threats
Impact
Important
A flaw was found in Redis. An authenticated attacker, in an unusual configuration where they can execute the RESTORE command, could exploit a double free vulnerability. This occurs when a specially crafted RESTORE payload references the same NACK (pending entry) by multiple consumers, and both consumers are subsequently deleted via XGROUP DELCONSUMER. Successful exploitation of this flaw could lead to remote code execution.
7.5 (High)
Affected products
Fixed
17 products
| Product | Identifier | Version | Remediation |
|---|---|---|---|
| Unresolved product id: AppStream-10.2.Z:valkey-0:8.0.11-1.el10_2.aarch64 | — |
Vendor Fix
fix
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| Unresolved product id: AppStream-10.2.Z:valkey-0:8.0.11-1.el10_2.ppc64le | — |
Vendor Fix
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|
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| Unresolved product id: AppStream-10.2.Z:valkey-0:8.0.11-1.el10_2.s390x | — |
Vendor Fix
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| Unresolved product id: AppStream-10.2.Z:valkey-0:8.0.11-1.el10_2.src | — |
Vendor Fix
fix
|
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| Unresolved product id: AppStream-10.2.Z:valkey-0:8.0.11-1.el10_2.x86_64 | — |
Vendor Fix
fix
|
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| Unresolved product id: AppStream-10.2.Z:valkey-debuginfo-0:8.0.11-1.el10_2.aarch64 | — |
Vendor Fix
fix
|
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| Unresolved product id: AppStream-10.2.Z:valkey-debuginfo-0:8.0.11-1.el10_2.ppc64le | — |
Vendor Fix
fix
|
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| Unresolved product id: AppStream-10.2.Z:valkey-debuginfo-0:8.0.11-1.el10_2.s390x | — |
Vendor Fix
fix
|
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| Unresolved product id: AppStream-10.2.Z:valkey-debuginfo-0:8.0.11-1.el10_2.x86_64 | — |
Vendor Fix
fix
|
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| Unresolved product id: AppStream-10.2.Z:valkey-debugsource-0:8.0.11-1.el10_2.aarch64 | — |
Vendor Fix
fix
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| Unresolved product id: AppStream-10.2.Z:valkey-debugsource-0:8.0.11-1.el10_2.ppc64le | — |
Vendor Fix
fix
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| Unresolved product id: AppStream-10.2.Z:valkey-debugsource-0:8.0.11-1.el10_2.s390x | — |
Vendor Fix
fix
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| Unresolved product id: AppStream-10.2.Z:valkey-debugsource-0:8.0.11-1.el10_2.x86_64 | — |
Vendor Fix
fix
|
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| Unresolved product id: AppStream-10.2.Z:valkey-devel-0:8.0.11-1.el10_2.aarch64 | — |
Vendor Fix
fix
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| Unresolved product id: AppStream-10.2.Z:valkey-devel-0:8.0.11-1.el10_2.ppc64le | — |
Vendor Fix
fix
|
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| Unresolved product id: AppStream-10.2.Z:valkey-devel-0:8.0.11-1.el10_2.s390x | — |
Vendor Fix
fix
|
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| Unresolved product id: AppStream-10.2.Z:valkey-devel-0:8.0.11-1.el10_2.x86_64 | — |
Vendor Fix
fix
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Threats
Impact
Important
References
39 references
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},
"discovery_date": "2026-08-18T14:31:14.626618+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2517906"
}
],
"notes": [
{
"category": "description",
"text": "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.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "valkey: Valkey: Remote code execution via use-after-free in stream deserialization",
"title": "Vulnerability summary"
},
{
"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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},
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{
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},
{
"category": "external",
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},
{
"category": "external",
"summary": "https://github.com/valkey-io/valkey/commit/06bc7768fe609f2054e69ccedefe7628f5675da9",
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{
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{
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{
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{
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{
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{
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{
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},
{
"category": "workaround",
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"scores": [
{
"cvss_v3": {
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"attackVector": "NETWORK",
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"baseScore": 8.8,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
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}
],
"title": "valkey: Valkey: Remote code execution via use-after-free in stream deserialization"
},
{
"cve": "CVE-2026-66373",
"cwe": {
"id": "CWE-1341",
"name": "Multiple Releases of Same Resource or Handle"
},
"discovery_date": "2026-07-25T01:00:50.771125+00:00",
"ids": [
{
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}
],
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{
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"title": "Vulnerability description"
},
{
"category": "summary",
"text": "redis: Redis: Remote Code Execution via specially crafted RESTORE payload",
"title": "Vulnerability summary"
},
{
"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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},
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{
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],
"title": "redis: Redis: Remote Code Execution via specially crafted RESTORE payload"
}
]
}
Loading…
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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.
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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.
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.
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