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TI-2026-20391 Aliases CVE-2026-25243

redis-server RESTORE invalid memory access may allow remote code execution

Priority MEDIUM 42CWE-122Published · Updated

Key facts

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

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and Red Hat. Impact type from CWE-122 and the CVSS impact.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.04033 90th percentileScored 2026-11-07
Fix Fixed redis (redis): 8.6.3Red Hat: 15 advisories

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
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 8.6.38.6.3Patch availableCNA
  • redis VendorRedis Affected before 8.6.3 Fixed in 8.6.3 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:redis:redis:*:*:*:*:*:*:*:*before 8.6.3VulnerableRedis
  • cpe:2.3:a:redis:redis:*:*:*:*:*:*:*:* Versions before 8.6.3 Vulnerable ·Redis

Remediation

  • Fix · CNA redis (redis) Fixed in 8.6.3

Red Hat 15 advisories

  • RHSA-2026:33427 Released 2026-06-30 · 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+24465+9d14ca70.7.ppc64le::redis:6, redis-6.2.7-1.module+el8.8.0+24465+9d14ca70.7.src::redis:6, redis-6.2.7-1.module+el8.8.0+24465+9d14ca70.7.x86_64::redis:6 +3
    • Red Hat Enterprise Linux AppStream TUS (v.8.8) redis-6.2.7-1.module+el8.8.0+24465+9d14ca70.7.src::redis:6, redis-6.2.7-1.module+el8.8.0+24465+9d14ca70.7.x86_64::redis:6, redis-devel-6.2.7-1.module+el8.8.0+24465+9d14ca70.7.x86_64::redis:6 +1
  • RHSA-2026:29817 Released 2026-06-25 · 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+24434+c7b1e4bc.7.src::redis:6, redis-6.0.9-5.module+el8.6.0+24434+c7b1e4bc.7.x86_64::redis:6, redis-devel-6.0.9-5.module+el8.6.0+24434+c7b1e4bc.7.x86_64::redis:6 +1
    • Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.6) redis-6.0.9-5.module+el8.6.0+24434+c7b1e4bc.7.src::redis:6, redis-6.0.9-5.module+el8.6.0+24434+c7b1e4bc.7.x86_64::redis:6, redis-devel-6.0.9-5.module+el8.6.0+24434+c7b1e4bc.7.x86_64::redis:6 +1
  • RHSA-2026:28142 Released 2026-06-23 · 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+24422+b373a9c6.7.aarch64::redis:7, redis-7.0.12-2.module+el9.4.0+24422+b373a9c6.7.ppc64le::redis:7, redis-7.0.12-2.module+el9.4.0+24422+b373a9c6.7.s390x::redis:7 +7
Show 12 more Red Hat advisories
  • RHSA-2026:28139 Released 2026-06-23 · Red Hat rating Important
    redis security update
    • Red Hat Enterprise Linux AppStream E4S (v.9.4) redis-6.2.7-1.el9_4.6, redis-devel-6.2.7-1.el9_4.6, redis-doc-6.2.7-1.el9_4.6
  • RHSA-2026:27787 Released 2026-06-22 · 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+24416+a7ffbc5f.6.src::redis:6, redis-6.0.9-5.module+el8.4.0+24416+a7ffbc5f.6.x86_64::redis:6, redis-devel-6.0.9-5.module+el8.4.0+24416+a7ffbc5f.6.x86_64::redis:6 +1
    • Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4) redis-6.0.9-5.module+el8.4.0+24416+a7ffbc5f.6.src::redis:6, redis-6.0.9-5.module+el8.4.0+24416+a7ffbc5f.6.x86_64::redis:6, redis-devel-6.0.9-5.module+el8.4.0+24416+a7ffbc5f.6.x86_64::redis:6 +1
  • RHSA-2026:27716 Released 2026-06-22 · Red Hat rating Important
    redis security update
    • Red Hat Enterprise Linux AppStream E4S (v.9.2) redis-6.2.7-1.el9_2.6, redis-devel-6.2.7-1.el9_2.6, redis-doc-6.2.7-1.el9_2.6
  • RHSA-2026:26540 Released 2026-06-17 · Red Hat rating Important
    valkey security update
    • Red Hat Enterprise Linux AppStream EUS (v. 10.0) valkey-8.0.9-1.el10_0, valkey-devel-8.0.9-1.el10_0
  • RHSA-2026:26306 Released 2026-06-16 · Red Hat rating Important
    redis:7 security update
    • Red Hat Enterprise Linux AppStream EUS (v.9.6) redis-7.2.14-1.module+el9.6.0+24344+1bc33ec7.aarch64::redis:7, redis-7.2.14-1.module+el9.6.0+24344+1bc33ec7.ppc64le::redis:7, redis-7.2.14-1.module+el9.6.0+24344+1bc33ec7.s390x::redis:7 +7
  • RHSA-2026:26233 Released 2026-06-16 · Red Hat rating Important
    redis security update
    • Red Hat Enterprise Linux AppStream EUS (v.9.6) redis-6.2.22-1.el9_6, redis-devel-6.2.22-1.el9_6, redis-doc-6.2.22-1.el9_6
  • RHSA-2026:26008 Released 2026-06-15 · Red Hat rating Important
    redis:6 security update
    • Red Hat Enterprise Linux AppStream (v. 8) redis-6.2.22-1.module+el8.10.0+24332+dbd3b426.aarch64::redis:6, redis-6.2.22-1.module+el8.10.0+24332+dbd3b426.ppc64le::redis:6, redis-6.2.22-1.module+el8.10.0+24332+dbd3b426.s390x::redis:6 +7
  • RHSA-2026:25925 Released 2026-06-15 · Red Hat rating Important
    valkey security update
    • Red Hat Enterprise Linux AppStream (v. 9) valkey-8.0.9-1.el9_8, valkey-devel-8.0.9-1.el9_8
  • RHSA-2026:25219 Released 2026-06-11 · Red Hat rating Important
    redis:7 security update
    • Red Hat Enterprise Linux AppStream (v. 9) redis-7.2.14-1.module+el9.8.0+24327+41ceb644.aarch64::redis:7, redis-7.2.14-1.module+el9.8.0+24327+41ceb644.ppc64le::redis:7, redis-7.2.14-1.module+el9.8.0+24327+41ceb644.s390x::redis:7 +7
  • RHSA-2026:25216 Released 2026-06-11 · Red Hat rating Important
    valkey security update
    • Red Hat Enterprise Linux AppStream (v. 10) valkey-8.0.9-1.el10_2, valkey-devel-8.0.9-1.el10_2
  • RHSA-2026:23229 Released 2026-06-04 · Red Hat rating Important
    redis security update
    • Red Hat Enterprise Linux AppStream (v. 9) redis-6.2.22-1.el9_8, redis-devel-6.2.22-1.el9_8, redis-doc-6.2.22-1.el9_8
  • RHSA-2026:14316 Released 2026-05-06 · Red Hat rating Important
    Red Hat Hardened Images RPMs bug fix and enhancement update
    • Red Hat Hardened Images valkey-9.0.4-0.1.hum1@aarch64, valkey-9.0.4-0.1.hum1@src, valkey-9.0.4-0.1.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-2026:25216
Red Hat Enterprise Linux AppStream (v. 8)Fixed RHSA-2026:26008
Red Hat Enterprise Linux AppStream (v. 9)Fixed RHSA-2026:23229, RHSA-2026:25219, RHSA-2026:25925
Red Hat Enterprise Linux AppStream AUS (v.8.4)Fixed RHSA-2026:27787
Red Hat Enterprise Linux AppStream AUS (v.8.6)Fixed RHSA-2026:29817
Red Hat Enterprise Linux AppStream E4S (v.8.8)Fixed RHSA-2026:33427
Red Hat Enterprise Linux AppStream E4S (v.9.2)Fixed RHSA-2026:27716
Red Hat Enterprise Linux AppStream E4S (v.9.4)Fixed RHSA-2026:28139, RHSA-2026:28142
Red Hat Enterprise Linux AppStream EUS (v. 10.0)Fixed RHSA-2026:26540
Red Hat Enterprise Linux AppStream EUS (v.9.6)Fixed RHSA-2026:26233, RHSA-2026:26306
Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4)Fixed RHSA-2026:27787
Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.6)Fixed RHSA-2026:29817
Red Hat Enterprise Linux AppStream TUS (v.8.8)Fixed RHSA-2026:33427
Red Hat Hardened ImagesFixed RHSA-2026:14316
Not affected: 1 product
  • Red Hat Hardened Images

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-25243
  2. 2026-10-25 EPSS moved to the 90th–95th percentile

References

Advisory 1

Other 1

  • 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-2023-18618 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
  • TI-2022-08549 Lua scripts can be manipulated to overcome ACL rules in Redis CVSS 3.1HIGH 7.8
See all 45 →

Sources

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