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RHSA-2026:61884

Vulnerability from csaf_redhat - Published: 2026-09-01 05:42 - Updated: 2026-09-08 23:07
Summary
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.

CWE-825 - Expired Pointer Dereference
Affected products
Product Identifier Version Remediation
Unresolved product id: Red Hat Hardened Images:valkey-main@aarch64
Vendor Fix fix
Workaround
Unresolved product id: Red Hat Hardened Images:valkey-main@noarch
Vendor Fix fix
Workaround
Unresolved product id: Red Hat Hardened Images:valkey-main@src
Vendor Fix fix
Workaround
Unresolved product id: Red Hat Hardened Images:valkey-main@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.

CWE-825 - Expired Pointer Dereference
Affected products
Product Identifier Version Remediation
Unresolved product id: Red Hat Hardened Images:valkey-main@aarch64
Vendor Fix fix
Workaround
Unresolved product id: Red Hat Hardened Images:valkey-main@noarch
Vendor Fix fix
Workaround
Unresolved product id: Red Hat Hardened Images:valkey-main@src
Vendor Fix fix
Workaround
Unresolved product id: Red Hat Hardened Images:valkey-main@x86_64
Vendor Fix fix
Workaround
Threats
Impact Important
References
URL Category
https://access.redhat.com/errata/RHSA-2026:61884 self
https://images.redhat.com/ external
https://access.redhat.com/security/cve/CVE-2026-85522 external
https://access.redhat.com/security/updates/classi… external
https://access.redhat.com/security/cve/CVE-2026-86227 external
https://access.redhat.com/security/cve/CVE-2026-56684 external
https://access.redhat.com/security/cve/CVE-2026-63639 external
https://security.access.redhat.com/data/csaf/v2/a… self
https://access.redhat.com/security/cve/CVE-2026-56684 self
https://bugzilla.redhat.com/show_bug.cgi?id=2517907 external
https://www.cve.org/CVERecord?id=CVE-2026-56684 external
https://nvd.nist.gov/vuln/detail/CVE-2026-56684 external
https://github.com/valkey-io/valkey/commit/7cd5bc… external
https://github.com/valkey-io/valkey/pull/4234 external
https://github.com/valkey-io/valkey/releases/tag/7.2.14 external
https://github.com/valkey-io/valkey/releases/tag/8.0.10 external
https://github.com/valkey-io/valkey/releases/tag/8.1.9 external
https://github.com/valkey-io/valkey/releases/tag/9.0.5 external
https://github.com/valkey-io/valkey/releases/tag/9.1.1 external
https://github.com/valkey-io/valkey/security/advi… external
https://access.redhat.com/security/cve/CVE-2026-63639 self
https://bugzilla.redhat.com/show_bug.cgi?id=2517906 external
https://www.cve.org/CVERecord?id=CVE-2026-63639 external
https://nvd.nist.gov/vuln/detail/CVE-2026-63639 external
https://github.com/valkey-io/valkey/commit/06bc77… external
https://github.com/valkey-io/valkey/commit/509cb3… external
https://github.com/valkey-io/valkey/commit/98465e… external
https://github.com/valkey-io/valkey/commit/e95911… external
https://github.com/valkey-io/valkey/commit/f8d202… external
https://github.com/valkey-io/valkey/pull/4073 external
https://github.com/valkey-io/valkey/security/advi… external

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        {
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          "date": "2026-09-01T05:42:50+00:00",
          "details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\nhttps://images.redhat.com/",
          "product_ids": [
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            "Red Hat Hardened Images:valkey-main@noarch",
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            "Red Hat Hardened Images:valkey-main@x86_64"
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          "url": "https://access.redhat.com/errata/RHSA-2026:61884"
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          "details": "Restrict network access to the Valkey instance to trusted clients and networks by configuring firewall rules to limit inbound connections to the Valkey service port. Ensure only authorized and authenticated clients can connect. If TLS is not strictly required, consider disabling it. These network restrictions will persist if the Valkey service is reloaded or restarted.",
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            "integrityImpact": "HIGH",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
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          "products": [
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        {
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          "details": "Important"
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      ],
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          "title": "Vulnerability description"
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        },
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          "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.",
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          "category": "external",
          "summary": "https://github.com/valkey-io/valkey/commit/98465eaffe3f95524a5046318bfbc4bdb9798291",
          "url": "https://github.com/valkey-io/valkey/commit/98465eaffe3f95524a5046318bfbc4bdb9798291"
        },
        {
          "category": "external",
          "summary": "https://github.com/valkey-io/valkey/commit/e95911d4d65be8789fa3705f44d7ed1e65378445",
          "url": "https://github.com/valkey-io/valkey/commit/e95911d4d65be8789fa3705f44d7ed1e65378445"
        },
        {
          "category": "external",
          "summary": "https://github.com/valkey-io/valkey/commit/f8d2027e8d4df790ac04974bf606408c8ea62778",
          "url": "https://github.com/valkey-io/valkey/commit/f8d2027e8d4df790ac04974bf606408c8ea62778"
        },
        {
          "category": "external",
          "summary": "https://github.com/valkey-io/valkey/pull/4073",
          "url": "https://github.com/valkey-io/valkey/pull/4073"
        },
        {
          "category": "external",
          "summary": "https://github.com/valkey-io/valkey/releases/tag/7.2.14",
          "url": "https://github.com/valkey-io/valkey/releases/tag/7.2.14"
        },
        {
          "category": "external",
          "summary": "https://github.com/valkey-io/valkey/releases/tag/8.0.10",
          "url": "https://github.com/valkey-io/valkey/releases/tag/8.0.10"
        },
        {
          "category": "external",
          "summary": "https://github.com/valkey-io/valkey/releases/tag/8.1.9",
          "url": "https://github.com/valkey-io/valkey/releases/tag/8.1.9"
        },
        {
          "category": "external",
          "summary": "https://github.com/valkey-io/valkey/releases/tag/9.0.5",
          "url": "https://github.com/valkey-io/valkey/releases/tag/9.0.5"
        },
        {
          "category": "external",
          "summary": "https://github.com/valkey-io/valkey/releases/tag/9.1.1",
          "url": "https://github.com/valkey-io/valkey/releases/tag/9.1.1"
        },
        {
          "category": "external",
          "summary": "https://github.com/valkey-io/valkey/security/advisories/GHSA-mvcj-73cw-22m4",
          "url": "https://github.com/valkey-io/valkey/security/advisories/GHSA-mvcj-73cw-22m4"
        }
      ],
      "release_date": "2026-08-18T14:23:52.508000+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2026-09-01T05:42:50+00:00",
          "details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\nhttps://images.redhat.com/",
          "product_ids": [
            "Red Hat Hardened Images:valkey-main@aarch64",
            "Red Hat Hardened Images:valkey-main@noarch",
            "Red Hat Hardened Images:valkey-main@src",
            "Red Hat Hardened Images:valkey-main@x86_64"
          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2026:61884"
        },
        {
          "category": "workaround",
          "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.",
          "product_ids": [
            "Red Hat Hardened Images:valkey-main@aarch64",
            "Red Hat Hardened Images:valkey-main@noarch",
            "Red Hat Hardened Images:valkey-main@src",
            "Red Hat Hardened Images:valkey-main@x86_64"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "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"
          },
          "products": [
            "Red Hat Hardened Images:valkey-main@aarch64",
            "Red Hat Hardened Images:valkey-main@noarch",
            "Red Hat Hardened Images:valkey-main@src",
            "Red Hat Hardened Images:valkey-main@x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Important"
        }
      ],
      "title": "valkey: Valkey: Remote code execution via use-after-free in stream deserialization"
    }
  ]
}



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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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Detection rules are retrieved from Rulezet.

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