CVE-2026-25243Redis Heap Buffer Overflow
redis: RESTORE invalid memory access may allow remote code execution
Published May 5, 2026 · Updated Oct 21, 2026 · Also known as ALPINE-CVE-2026-25243, BIT-keydb-2026-25243, BIT-redis-2026-25243, BIT-valkey-2026-25243, DEBIAN-CVE-2026-25243, GHSA-c8h9-259x-jff4, UBUNTU-CVE-2026-25243
Key Facts
Patch immediately- CVE-2026-25243 is a high-severity vulnerability (CVSS 7.7 v4) affecting Azl3 Valkey 8.0.7-1 (Microsoft), Azl3 Valkey 8.0.9-1 (Microsoft), Redis and 22 more products.
- It is exploited in the wild, listed in CIRCL KEV, Industry KEV feed since Oct 17, 2026. No public exploit code is known.
- EPSS estimates a 4.0% probability of exploitation in the next 30 days.
- Fixed versions are available, including keydb 6.2.22, keydb 7.2.14, keydb 7.4.9.
- Brandefense priority: patch immediately, because it is listed as exploited in the wild.
Scores
CVSS v4
7.7
CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
EPSS (30-day exploit likelihood)
4.0%
Higher than 90.5% of all scored CVEs
Exploit maturity
Exploited (KEV)
ATLAS score
65/100
Publication score, see How it works
Exploitation Verdict
KEV listed
Oct 17, 2026
165 days after publication
Federal due date
None
No federal due date
Ransomware use
Not reported
Attributed actors
None named
Exploit & Defence Guidance
Exploit maturity
Exploited (KEV)
Public exploit code
4
Proof-of-concept links
In-the-wild evidence
1
Reports of active use
Advisories And Exploit References
Description
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.
Known-Exploited Catalog Listings
| Catalog | Added | Remediation due | Ransomware use |
|---|---|---|---|
| CIRCL KEV | Oct 17, 2026 | n/a | Not reported |
| Industry KEV feed | Oct 17, 2026 | n/a | Not reported |
Affected Products
147 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| Azl3 Valkey 8.0.7-1Microsoft | See advisory | n/a |
| Azl3 Valkey 8.0.9-1Microsoft | See advisory | n/a |
| RedisRedis | < 8.6.3 | 8.6.3 |
| valkeyalpine | See advisory | 7.2.13-r0 |
| redis-8.4chainguard | See advisory | 8.4.6-r2 |
Patched Releases
keydb
6.2.22, 7.2.14, 7.4.9, 8.2.6, 8.4.3, 8.6.3
redhat enterprise linux
9080020260521083756.9
redhat rhel e4s
9040020260618054637.9
redhat rhel eus
9060020260602115714.9
Redis
0:6.2.22-1.el9_8, 5:7.0.15-1~deb12u8, 5:8.0.2-3+deb13u3, 5:8.0.6-3, 6.2.22, 6.2.22-1.0.1.module+el8.10.0+90916+da0c6127, 6.2.22-1.el9_8, 6.2.22-1.module_el8.10.0+4197+3446deec, 6.2.22-1.module+el8.10.0+40211+0d1d5c90, 6.2.6-150400.3.46.1, 7.2.14, 7.2.14-1.0.1.module+el9.8.0+90920+b17784e3, 7.2.14-1.module_el9.8.0+258+b8f945d3, 7.2.14-1.module+el9.8.0+40207+e2014501, 7.2.14-1.ph4, 7.2.4-150600.3.24.1, 7.4.9, 8.10.1-bp160.1.1, 8.2.6, 8.4.3, 8.6.3, 8.6.3-1.1
redis-7.2
7.2.14-r0
redis-7.4
7.4.9-r0
redis-8.2
8.2.6-r0
redis-8.4
8.4.3-r0, 8.4.6-r2
redis-8.6
8.6.3-r0
redis-bloom
8.10.1-bp160.1.1
redis-devel
6.2.22-1.0.1.module+el8.10.0+90916+da0c6127, 6.2.22-1.el9_8, 7.2.14-1.0.1.module+el9.8.0+90920+b17784e3
redis-doc
6.2.22-1.0.1.module+el8.10.0+90916+da0c6127, 6.2.22-1.el9_8, 7.2.14-1.0.1.module+el9.8.0+90920+b17784e3
redis-json
8.10.1-bp160.1.1
redis-search
8.10.1-bp160.1.1
redis-server
TBD
redis-timeseries
8.10.1-bp160.1.1
redis:6
8080020260626132343.63b34585
redis:7
9060020260602115714.9
redis/redis
TBD
redis7
7.0.8-150500.3.31.1, 7.0.8-150600.8.25.1
valkey
0:8.0.9-1.el10_0, 0:8.0.9-1.el9_8, 7.2.13, 7.2.13-r0, 8.0.8, 8.0.9-1, 8.0.9-1.el10_2, 8.0.9-1.el9_8, 8.0.9-150600.13.23.1, 8.0.9-150700.3.17.1, 8.0.9-160000.1.1, 8.1.7, 8.1.7-r0, 9.0.4, 9.0.4-1.1, 9.0.4-1.amzn2023.0.1, 9.0.4-r0, 9.1.1-1
valkey-compat-redis
8.0.9-150600.13.23.1, 8.0.9-150700.3.17.1, 8.0.9-160000.1.1, 9.0.4-1.1
valkey-devel
8.0.9-1.el10_2, 8.0.9-1.el9_8, 8.0.9-150600.13.23.1, 8.0.9-150700.3.17.1, 8.0.9-160000.1.1, 9.0.4-1.1, 9.0.4-1.amzn2023.0.1
valkey-main
9.0.4-0.1.hum1
Timeline
Publicly disclosed
May 5, 2026
Added to CIRCL KEV
Oct 17, 2026
Added to Industry KEV feed
Oct 17, 2026
Last updated
Oct 21, 2026
Weakness Type
- CWE-20 Improper Input Validation
- CWE-122 Heap-based Buffer Overflow
References
- advisorycve.org · CVERecord
- advisorysecurity.alpinelinux.org · CVE-2026-25243
- advisorysecurity-tracker.debian.org · CVE-2026-25243
- advisoryubuntu.com · CVE-2026-25243
- advisoryRHSA-2026:14316
FAQ
Common Questions.
Redis is an in-memory data structure store.
Affected: Azl3 Valkey 8.0.7-1 (Microsoft); Azl3 Valkey 8.0.9-1 (Microsoft); Redis versions < 8.6.3, among others. The full list is in the CVE brief.
It is exploited in the wild, listed in CIRCL KEV, Industry KEV feed since Oct 17, 2026.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
No public exploit code is known.
Fixed versions are available, including keydb 6.2.22, keydb 7.2.14, keydb 7.4.9.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.
Is CVE-2026-25243 On Your Attack Surface?
Brandefense matches it against the products discovered on your perimeter and opens a finding the day a CVE like this is listed.
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