CVE-2026-23479
CVE-2026-23479 · redis-server use-after-free in unblock client flow may allow remote code execution
This page contains facts from public vulnerability sources. Check the original advisory before updating.
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.
CVSS 7.7 · High · EPSS 1.5% · Fix available
- Published
- Updated
Affected products and versions
redis
- Versions
- >= 7.2.0, < 8.6.3: Affected
No fix published
redict Debian:14
- Versions
- 7.3.0+ds-1
- 7.3.0+ds-2
- 7.3.0+ds-3
- 7.3.0+ds-3~bpo12+1
- 7.3.1+ds-1
- 7.3.2+ds-1
- 7.3.2+ds-1~bpo12+1
- 7.3.5+ds-1
- 7.3.5+ds-1~bpo12+1
- 7.3.6+ds-1
- 7.3.6+ds-1~bpo12+1
- 7.3.6+ds-1~bpo13+1
- 7.3.6+ds-2
- 7.3.6+ds-2~bpo12+1
- 7.3.6+ds-2~bpo13+1
- 7.3.6+ds-3
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
redis Debian:13
- Versions
- 5:8.0.2-3
- 5:8.0.2-3+deb13u1
- 5:8.0.2-3+deb13u2
- Affected ranges
- ECOSYSTEM: < 5:8.0.2-3+deb13u3
Update to 5:8.0.2-3+deb13u3
redis Debian:14
- Versions
- 5:8.0.2-3
- 5:8.0.4-1
- 5:8.0.5-1
- 5:8.0.6-1
- 5:8.0.6-2
- Affected ranges
- ECOSYSTEM: < 5:8.0.6-3
Update to 5:8.0.6-3
valkey Debian:13
- Versions
- 8.1.1+dfsg1-3
- 8.1.1+dfsg1-3+deb13u1
- 8.1.1+dfsg1-3+deb13u2
- 8.1.4+dfsg1-1
- 8.1.4+dfsg1-2
- 9.1.1-1
- 9.1.2-1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
valkey Debian:14
- Versions
- 8.1.1+dfsg1-3
- 8.1.4+dfsg1-1
- 8.1.4+dfsg1-2
- Affected ranges
- ECOSYSTEM: < 9.1.1-1
Update to 9.1.1-1
redis Ubuntu:Pro:14.04:LTS
- Versions
- 2:2.6.13-1
- 2:2.6.16-3
- 2:2.8.0-1
- 2:2.8.2-1
- 2:2.8.4-2
- 2:2.8.4-2ubuntu0.2
- 2:2.8.4-2ubuntu0.2+esm1
- 2:2.8.4-2ubuntu0.2+esm2
- 2:2.8.4-2ubuntu0.2+esm3
- 2:2.8.4-2ubuntu0.2+esm4
- 2:2.8.4-2ubuntu0.2+esm5
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
redis Ubuntu:Pro:16.04:LTS
- Versions
- 2:3.0.3-3
- 2:3.0.5-1
- 2:3.0.5-2
- 2:3.0.5-3
- 2:3.0.5-4
- 2:3.0.6-1
- 2:3.0.6-1ubuntu0.2
- 2:3.0.6-1ubuntu0.3
- 2:3.0.6-1ubuntu0.4
- 2:3.0.6-1ubuntu0.4+esm1
- 2:3.0.6-1ubuntu0.4+esm2
- 2:3.0.6-1ubuntu0.4+esm3
- 2:3.0.6-1ubuntu0.4+esm4
- 2:3.0.6-1ubuntu0.4+esm5
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
redis Ubuntu:Pro:18.04:LTS
- Versions
- 4:4.0.1-7
- 4:4.0.2-6
- 4:4.0.2-9
- 5:4.0.5-1
- 5:4.0.6-1
- 5:4.0.6-2
- 5:4.0.7-1
- 5:4.0.8-1
- 5:4.0.8-2
- 5:4.0.9-1
- 5:4.0.9-1ubuntu0.1
- 5:4.0.9-1ubuntu0.2
- 5:4.0.9-1ubuntu0.2+esm2
- 5:4.0.9-1ubuntu0.2+esm3
- 5:4.0.9-1ubuntu0.2+esm4
- 5:4.0.9-1ubuntu0.2+esm5
- 5:4.0.9-1ubuntu0.2+esm6
- 5:4.0.9-1ubuntu0.2+esm7
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
redis Ubuntu:Pro:20.04:LTS
- Versions
- 5:5.0.5-2build1
- 5:5.0.6-1
- 5:5.0.7-1
- 5:5.0.7-2
- 5:5.0.7-2ubuntu0.1~esm1
- 5:5.0.7-2ubuntu0.1
- 5:5.0.7-2ubuntu0.1+esm1
- 5:5.0.7-2ubuntu0.1+esm2
- 5:5.0.7-2ubuntu0.1+esm3
- 5:5.0.7-2ubuntu0.1+esm4
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
redis Ubuntu:Pro:22.04:LTS
- Versions
- 5:6.0.15-1
- 5:6.0.16-1
- 5:6.0.16-1build1
- 5:6.0.16-1ubuntu1
- 5:6.0.16-1ubuntu1+esm1
- 5:6.0.16-1ubuntu1+esm2
- 5:6.0.16-1ubuntu1.1
- 5:6.0.16-1ubuntu1.1+esm1
- 5:6.0.16-1ubuntu1.2
- 5:6.0.16-1ubuntu1.2+esm1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
redis Ubuntu:24.04:LTS
- Versions
- 5:7.0.12-1
- 5:7.0.14-1
- 5:7.0.14-2
- 5:7.0.15-1
- 5:7.0.15-1build1
- 5:7.0.15-1build2
- 5:7.0.15-1ubuntu0.24.04.1
- 5:7.0.15-1ubuntu0.24.04.2
- 5:7.0.15-1ubuntu0.24.04.3
- 5:7.0.15-1ubuntu0.24.04.4
- 5:7.0.15-1ubuntu0.24.04.5
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
redis Ubuntu:25.10
- Versions
- 5:7.0.15-3
- 5:7.0.15-3.1
- 5:8.0.2-3
- 5:8.0.2-3build1
- 5:8.0.2-3ubuntu0.25.10.1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
redis Ubuntu:26.10
- Versions
- 5:8.0.5-1
- 5:8.0.6-2
- 5:8.0.6-2build1
- 5:8.0.6-3
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
redis Ubuntu:26.04:LTS
- Versions
- 5:8.0.2-3build1
- 5:8.0.2-3ubuntu0.25.10.1
- 5:8.0.5-1
- 5:8.0.5-1ubuntu0.1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
Original sources
- https://github.com/redis/redis/security/advisories/GHSA-93m2-935m-8rj3
- https://github.com/redis/redis/releases/tag/8.6.3
- https://access.redhat.com/security/cve/CVE-2026-23479
- https://bugzilla.redhat.com/show_bug.cgi?id=2466780
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-23479.json
- https://access.redhat.com/errata/RHSA-2026:26540
- https://access.redhat.com/errata/RHSA-2026:25216
- https://access.redhat.com/errata/RHSA-2026:26306
- https://access.redhat.com/errata/RHSA-2026:25219
- https://access.redhat.com/errata/RHSA-2026:25925
- https://access.redhat.com/errata/RHSA-2026:7662
- https://access.redhat.com/errata/RHSA-2026:14316
- https://nvd.nist.gov/vuln/detail/CVE-2026-23479