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TI-2026-47139 Aliases CVE-2026-66373GHSA-c964-568j-vxx7

Double free in Redis

Priority HIGH 68CWE-415Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
High
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat. Impact type from CWE-415 and the CVSS impact.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00872 59th percentileScored 2026-11-07
Fix Fixed Redis (Redis): 8.8.0Red Hat: 15 advisories

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
RedisRedisbefore 8.8.08.8.0Patch availableCNA
  • Redis VendorRedis Affected before 8.8.0 Fixed in 8.8.0 Patch available CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:a:redis:redis:*:*:*:*:*:*:*:*——Redis
  • cpe:2.3:a:redis:redis:*:*:*:*:*:*:*:* Versions — — ·Redis

Remediation

  • Fix · CNA Redis (Redis) Fixed in 8.8.0

Red Hat 15 advisories

  • RHSA-2026:69861 Released 2026-09-22 · Red Hat rating Important
    redis security update
    • Red Hat Enterprise Linux AppStream E4S (v.9.4) redis-6.2.7-1.el9_4.7, redis-devel-6.2.7-1.el9_4.7, redis-doc-6.2.7-1.el9_4.7
  • RHSA-2026:69862 Released 2026-09-22 · Red Hat rating Important
    redis security update
    • Red Hat Enterprise Linux AppStream E4S (v.9.2) redis-6.2.7-1.el9_2.7, redis-devel-6.2.7-1.el9_2.7, redis-doc-6.2.7-1.el9_2.7
  • RHSA-2026:69520 Released 2026-09-21 · Red Hat rating Important
    redis:7 security update
    • Red Hat Enterprise Linux AppStream EUS (v.9.6) redis-7.2.16-1.module+el9.6.0+24910+8b24772d.aarch64::redis:7, redis-7.2.16-1.module+el9.6.0+24910+8b24772d.ppc64le::redis:7, redis-7.2.16-1.module+el9.6.0+24910+8b24772d.s390x::redis:7 +7
Show 12 more Red Hat advisories
  • RHSA-2026:69521 Released 2026-09-21 · Red Hat rating Important
    redis:7 security update
    • Red Hat Enterprise Linux AppStream E4S (v.9.4) redis-7.0.12-2.module+el9.4.0+24911+6845972a.9.aarch64::redis:7, redis-7.0.12-2.module+el9.4.0+24911+6845972a.9.ppc64le::redis:7, redis-7.0.12-2.module+el9.4.0+24911+6845972a.9.s390x::redis:7 +7
  • RHSA-2026:69534 Released 2026-09-21 · Red Hat rating Important
    redis:6 security update
    • Red Hat Enterprise Linux AppStream AUS (v.8.6) redis-6.0.9-5.module+el8.6.0+24913+caade4b4.8.src::redis:6, redis-6.0.9-5.module+el8.6.0+24913+caade4b4.8.x86_64::redis:6, redis-devel-6.0.9-5.module+el8.6.0+24913+caade4b4.8.x86_64::redis:6 +1
    • Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.6) redis-6.0.9-5.module+el8.6.0+24913+caade4b4.8.aarch64::redis:6, redis-6.0.9-5.module+el8.6.0+24913+caade4b4.8.ppc64le::redis:6, redis-6.0.9-5.module+el8.6.0+24913+caade4b4.8.s390x::redis:6 +7
  • RHSA-2026:69533 Released 2026-09-21 · Red Hat rating Important
    redis:6 security update
    • Red Hat Enterprise Linux AppStream E4S (v.8.8) redis-6.2.7-1.module+el8.8.0+24912+36dda224.8.ppc64le::redis:6, redis-6.2.7-1.module+el8.8.0+24912+36dda224.8.src::redis:6, redis-6.2.7-1.module+el8.8.0+24912+36dda224.8.x86_64::redis:6 +3
    • Red Hat Enterprise Linux AppStream TUS (v.8.8) redis-6.2.7-1.module+el8.8.0+24912+36dda224.8.src::redis:6, redis-6.2.7-1.module+el8.8.0+24912+36dda224.8.x86_64::redis:6, redis-devel-6.2.7-1.module+el8.8.0+24912+36dda224.8.x86_64::redis:6 +1
  • RHSA-2026:69542 Released 2026-09-21 · Red Hat rating Important
    redis:6 security update
    • Red Hat Enterprise Linux AppStream AUS (v.8.4) redis-6.0.9-5.module+el8.4.0+24914+3cb9e211.7.src::redis:6, redis-6.0.9-5.module+el8.4.0+24914+3cb9e211.7.x86_64::redis:6, redis-devel-6.0.9-5.module+el8.4.0+24914+3cb9e211.7.x86_64::redis:6 +1
    • Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4) redis-6.0.9-5.module+el8.4.0+24914+3cb9e211.7.aarch64::redis:6, redis-6.0.9-5.module+el8.4.0+24914+3cb9e211.7.ppc64le::redis:6, redis-6.0.9-5.module+el8.4.0+24914+3cb9e211.7.s390x::redis:6 +7
  • RHSA-2026:68601 Released 2026-09-17 · Red Hat rating Important
    valkey security update
    • Red Hat Enterprise Linux AppStream EUS (v. 10.0) valkey-8.0.11-1.el10_0, valkey-devel-8.0.11-1.el10_0
  • RHSA-2026:67461 Released 2026-09-14 · Red Hat rating Important
    redis security update
    • Red Hat Enterprise Linux AppStream EUS (v.9.6) redis-6.2.24-1.el9_6, redis-devel-6.2.24-1.el9_6, redis-doc-6.2.24-1.el9_6
  • RHSA-2026:65120 Released 2026-09-08 · Red Hat rating Important
    redis:7 security update
    • Red Hat Enterprise Linux AppStream (v. 9) redis-7.2.16-1.module+el9.8.0+24745+654dcf03.aarch64::redis:7, redis-7.2.16-1.module+el9.8.0+24745+654dcf03.ppc64le::redis:7, redis-7.2.16-1.module+el9.8.0+24745+654dcf03.s390x::redis:7 +7
  • RHSA-2026:64824 Released 2026-09-08 · Red Hat rating Important
    redis security, bug fix, and enhancement update
    • Red Hat Enterprise Linux AppStream (v. 9) redis-6.2.24-1.el9_8, redis-devel-6.2.24-1.el9_8, redis-doc-6.2.24-1.el9_8
  • RHSA-2026:64823 Released 2026-09-08 · Red Hat rating Important
    redis:6 security update
    • Red Hat Enterprise Linux AppStream (v. 8) redis-6.2.24-1.module+el8.10.0+24746+7b800ac5.aarch64::redis:6, redis-6.2.24-1.module+el8.10.0+24746+7b800ac5.ppc64le::redis:6, redis-6.2.24-1.module+el8.10.0+24746+7b800ac5.s390x::redis:6 +7
  • RHSA-2026:64807 Released 2026-09-08 · Red Hat rating Important
    valkey security, bug fix, and enhancement update
    • Red Hat Enterprise Linux AppStream (v. 9) valkey-8.0.10-1.el9_8, valkey-devel-8.0.10-1.el9_8
  • RHSA-2026:64796 Released 2026-09-08 · Red Hat rating Important
    valkey security, bug fix, and enhancement update
    • Red Hat Enterprise Linux AppStream (v. 10) valkey-8.0.11-1.el10_2, valkey-devel-8.0.11-1.el10_2
  • RHSA-2026:43236 Released 2026-07-22 · Red Hat rating Important
    Red Hat Hardened Images RPMs bug fix and enhancement update
    • Red Hat Hardened Images valkey-9.0.5-0.1.hum1@aarch64, valkey-9.0.5-0.1.hum1@src, valkey-9.0.5-0.1.hum1@x86_64 +10

Vendor assessments

Red Hat

Red Hat rating: Important. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux AppStream (v. 10)Fixed RHSA-2026:64796
Red Hat Enterprise Linux AppStream (v. 8)Fixed RHSA-2026:64823
Red Hat Enterprise Linux AppStream (v. 9)Fixed RHSA-2026:64807, RHSA-2026:64824, RHSA-2026:65120
Red Hat Enterprise Linux AppStream AUS (v.8.4)Fixed RHSA-2026:69542
Red Hat Enterprise Linux AppStream AUS (v.8.6)Fixed RHSA-2026:69534
Red Hat Enterprise Linux AppStream E4S (v.8.8)Fixed RHSA-2026:69533
Red Hat Enterprise Linux AppStream E4S (v.9.2)Fixed RHSA-2026:69862
Red Hat Enterprise Linux AppStream E4S (v.9.4)Fixed RHSA-2026:69521, RHSA-2026:69861
Red Hat Enterprise Linux AppStream EUS (v. 10.0)Fixed RHSA-2026:68601
Red Hat Enterprise Linux AppStream EUS (v.9.6)Fixed RHSA-2026:67461, RHSA-2026:69520
Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4)Fixed RHSA-2026:69542
Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.6)Fixed RHSA-2026:69534
Red Hat Enterprise Linux AppStream TUS (v.8.8)Fixed RHSA-2026:69533
Red Hat Hardened ImagesFixed RHSA-2026:43236
Not affected: 1 product
  • Red Hat Hardened Images

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-66373
  2. 2026-10-03 Alias added: GHSA-c964-568j-vxx7

References

Other 5

  • TI-2022-00463 Missing authorization in Debian redis KEVCVSS 3.1CRITICAL 10.0
  • TI-2025-31759 Redis Lua Use-After-Free may lead to remote code execution CVSS 3.1CRITICAL 10.0
  • TI-2023-15161 Redis raft master-1b8bd86 to master-7b46079 was discovered to contain an ODR violation… CVSS 3.1CRITICAL 9.8
  • TI-2023-18618 Heap overflow in COMMAND GETKEYS and ACL evaluation in Redis CVSS 3.1HIGH 8.8
  • TI-2024-20813 Lua library commands may lead to stack overflow and RCE in Redis CVSS 3.1HIGH 8.8
  • TI-2022-08647 Heap overflow issue with the Lua cjson library used by Redis CVSS 3.1HIGH 8.8
See all 59 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences