Redis is an in-memory data structure store. In redis-server from 7.2.0 until 8.6.3, the unblock client flow does not handle an error return from `processCommandAndResetClient` when re-executing a blocked command. If a blocked client is evicted during this flow, an authenticated attacker can trigger a use-after-free that may lead to remote code execution. This has been patched in version 8.6.3.

Multiple Vulnerabilities in Redis

It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2023-2026-1748 advisory.

    Redis is an in-memory data structure store. In redis-server from 7.2.0 until 8.6.3, the unblock client     flow does not handle an error return from `processCommandAndResetClient` when re-executing a blocked     command. If a blocked client is evicted during this flow, an authenticated attacker can trigger a use-     after-free that may lead to remote code execution. This has been patched in version 8.6.3.
    (CVE-2026-23479)

    Redis is an in-memory data structure store. In all versions of redis-server with Lua scripting, an     authenticated attacker can exploit the master-replica synchronization mechanism to trigger a use-after-     free on replicas where replica-read-only is disabled or can be disabled, which may lead to remote code     execution. A workaround is to prevent users from executing Lua scripts or avoid using replicas where     replica-read-only is disabled. This is patched in version 8.6.3. (CVE-2026-23631)

    Redis is an in-memory data structure store. In versions of redis-server up to 8.6.3, the RESTORE command     does not properly validate serialized values. An authenticated attacker with permission to execute RESTORE     can supply a crafted serialized payload that triggers invalid memory access and may lead to remote code     execution. A workaround is to restrict access to the RESTORE command with ACL rules. This is patched in     version 8.6.3. (CVE-2026-25243)

Tenable has extracted the preceding description block directly from the tested product security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote SUSE Linux SLES15 / SLES_SAP15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2026:1949-1 advisory.

    This update for valkey fixes the following issues

    - CVE-2026-23479: use-after-free in unblock client flow may lead to remote code execution (bsc#1264164).
    - CVE-2026-23631: Lua use-after-free via the master-replica synchronization mechanism may lead to remote     code execution       (bsc#1264165).
    - CVE-2026-25243: invalid memory access in RESTORE command via a specially crafted serialized payload may     lead to remote       code execution (bsc#1264166).

    Changes for valkey:

    - Update to 8.0.9.

Tenable has extracted the preceding description block directly from the SUSE security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote SUSE Linux SLES15 / SLES_SAP15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2026:1950-1 advisory.

    This update for valkey fixes the following issues

    - CVE-2026-23479: use-after-free in unblock client flow may lead to remote code execution (bsc#1264164).
    - CVE-2026-23631: Lua use-after-free via the master-replica synchronization mechanism may lead to remote     code execution       (bsc#1264165).
    - CVE-2026-25243: invalid memory access in RESTORE command via a specially crafted serialized payload may     lead to remote       code execution (bsc#1264166).

    Changes for valkey:

      - Update to 8.0.9:

Tenable has extracted the preceding description block directly from the SUSE security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Fedora 42 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2026-114b1e5d3a advisory.

    ## Version 8.0.9

    Security fixes

    -    (**CVE-2026-23479**) Use-After-Free in unblock client flow
    -    (**CVE-2026-25243**) Invalid Memory Access in RESTORE command
    -    (**CVE-2026-23631**) Use-after-free when full sync occurs during a yielding Lua/function execution




Tenable has extracted the preceding description block directly from the Fedora security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Fedora 43 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2026-76cf27ea56 advisory.

    ## Version 8.1.7

    Security fixes

    -    (**CVE-2026-23479**) Use-After-Free in unblock client flow
    -    (**CVE-2026-25243**) Invalid Memory Access in RESTORE command
    -    (**CVE-2026-23631**) Use-after-free when full sync occurs during a yielding Lua/function execution




Tenable has extracted the preceding description block directly from the Fedora security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Fedora 44 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2026-3e31dafe5c advisory.

    ## Version 9.0.4

    Security fixes

    -    (**CVE-2026-23479**) Use-After-Free in unblock client flow
    -    (**CVE-2026-25243**) Invalid Memory Access in RESTORE command
    -    (**CVE-2026-23631**) Use-after-free when full sync occurs during a yielding Lua/function execution



Tenable has extracted the preceding description block directly from the Fedora security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - Redis is an in-memory data structure store. In redis-server from 7.2.0 until 8.6.3, the unblock client     flow does not handle an error return from `processCommandAndResetClient` when re-executing a blocked     command. If a blocked client is evicted during this flow, an authenticated attacker can trigger a use-     after-free that may lead to remote code execution. This has been patched in version 8.6.3.
    (CVE-2026-23479)

Note that Nessus relies on the presence of the package as reported by the vendor.

ID	Name	Product	Family	Severity
316991	Amazon Linux 2023 : valkey, valkey-devel (ALAS2023-2026-1748)	Nessus	Amazon Linux Local Security Checks	high
315282	SUSE SLES15 Security Update : valkey (SUSE-SU-2026:1949-1)	Nessus	SuSE Local Security Checks	high
315274	SUSE SLES15 Security Update : valkey (SUSE-SU-2026:1950-1)	Nessus	SuSE Local Security Checks	high
315122	Fedora 42 : valkey (2026-114b1e5d3a)	Nessus	Fedora Local Security Checks	high
315119	Fedora 43 : valkey (2026-76cf27ea56)	Nessus	Fedora Local Security Checks	high
315109	Fedora 44 : valkey (2026-3e31dafe5c)	Nessus	Fedora Local Security Checks	high
312607	Linux Distros Unpatched Vulnerability : CVE-2026-23479	Nessus	Misc.	high

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