Redis before 8.8.0, in the unusual case where an authenticated attacker can execute RESTORE, allows remote code execution via a RESTORE payload where the same NACK (pending entry) is referenced by more than one consumer, because deleting both consumers via XGROUP DELCONSUMER leads to a double free. NOTE: this issue exists because of an incomplete fix for CVE-2026-25243.

The remote Debian 11 / 12 host has packages installed that are affected by a vulnerability as referenced in the dla-4722 advisory.

    - -------------------------------------------------------------------------     Debian LTS Advisory DLA-4722-1                debian-lts@lists.debian.org     https://www.debian.org/lts/security/                           Chris Lamb     August 06, 2026                               https://wiki.debian.org/LTS
    - -------------------------------------------------------------------------

    Package        : redis     Version        : 5:5.0.14-1+deb10u11     CVE ID         : CVE-2026-66373

    It was discovered that there was a potential remote-code     vulnerability in Redis, the key-value database.

    CVE-2026-66373

        In the unusual case where an authenticated attacker could execute         the `RESTORE` command, a malicious `RESTORE` payload could have         resulted in a double-free.

    For Debian 11 bullseye, this problem has been fixed in version     5:6.0.16-1+deb11u9.

    For Debian 12 bookworm, this problem has been fixed in version     5:7.0.15-1~deb12u9.

    We recommend that you upgrade your redis packages.

    For the detailed security status of redis please refer to     its security tracker page at:
    https://security-tracker.debian.org/tracker/redis

    Further information about Debian LTS security advisories, how to apply     these updates to your system and frequently asked questions can be     found at: https://wiki.debian.org/LTS

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

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

The version of Redis installed on the remote host is prior to 8.8.0.
It is, therefore, affected by a remote code execution vulnerability.

  - Redis before 8.8.0, in the unusual case where an authenticated     attacker can execute RESTORE, allows remote code execution via a     RESTORE payload where the same NACK (pending entry) is referenced     by more than one consumer, because deleting both consumers via     XGROUP DELCONSUMER leads to a double free. NOTE: this issue exists     because of an incomplete fix for CVE-2026-25243.
    (CVE-2026-66373)

Note that Nessus has not tested for this issue 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 before 8.8.0, in the unusual case where an authenticated attacker can execute RESTORE, allows remote     code execution via a RESTORE payload where the same NACK (pending entry) is referenced by more than one     consumer, because deleting both consumers via XGROUP DELCONSUMER leads to a double free. NOTE: this issue     exists because of an incomplete fix for CVE-2026-25243. (CVE-2026-66373)

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

ID	Name	Product	Family	Type	Severity
333161	Debian dla-4722 : redis - security update	Nessus	Debian Local Security Checks	Local	high
331358	Redis < 8.8.0 RCE via RESTORE Double Free (CVE-2026-66373)	Nessus	Misc.	Remote	high
330019	Linux Distros Unpatched Vulnerability : CVE-2026-66373	Nessus	Misc.	Local	high

Detections

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CVE-2026-66373

high

Tenable Plugins

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high

high