CVE-2025-49844

CRITICALNVD 9.99.9—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 9.9 under NVD CVSS v3. EPSS exploit probability: 11.1%, top 6% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
Weaponized
9.9
EchelonGraph verdictPatch this weekExploitation is likely or a public exploit exists.
  • High exploitation likelihood — EPSS 87%
CISA-KEV: Not listedEPSS: 87%CVSS: 9.9Exploit: NoneExposed: 0

A fix is available — apply it.

Redis is an open source, in-memory database that persists on disk. Versions 8.2.1 and below allow an authenticated user to use a specially crafted Lua script to manipulate the garbage collector, trigger a use-after-free and potentially lead to remote code execution. The problem exists in all versions of Redis with Lua scripting. This issue is fixed in version 8.2.2. To workaround this issue without patching the redis-server executable is to prevent users from executing Lua scripts. This can be done using ACL to restrict EVAL and EVALSHA commands.

CVSS v3
9.9
EG Score
9.9(medium)
EPSS
99.7%
KEV
Not listed

Published

October 3, 2025

Last Modified

March 20, 2026

Advisory Details (5)

Auto-updated Jul 12, 2026
Patch available. Sources: github_commit, github_release, github.
generic

GitHub - lastvocher/redis-CVE-2025-49844 · GitHub

https://github.com/lastvocher/redis-CVE-2025-49844
generic

oss-security - redis: CVE-2025-49844: Lua Use-After-Free may lead to remote code execution

http://www.openwall.com/lists/oss-security/2025/10/07/2
github Patch Available

Lua Use-After-Free may lead to remote code execution · Advisory · redis/redis · GitHub

https://github.com/redis/redis/security/advisories/GHSA-4789-qfc9-5f9q
github_release Patch Available

8.2.2

Patch available: redis/redis 8.2.2

https://github.com/redis/redis/releases/tag/8.2.2
github_commit Patch Available

commit d5728cb5795c (redis/redis)

Patch available: redis/redis 8.2.3 (contains commit d5728cb5795c)

https://github.com/redis/redis/commit/d5728cb5795c966c5b5b1e0f0ac576a7e69af539

Vendor Advisories for CVE-2025-49844(18)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(24)

Vendor / EcosystemFixed in / PatchReleasedSource
ubunturedis-tools (5:7.0.15-3ubuntu0.1) @ plucky2026-05-29ubuntu
ubunturedis-tools (5:6.0.16-1ubuntu1.1) @ jammy2026-05-29ubuntu
ubuntuvalkey-tools (8.1.4+dfsg1-0ubuntu0.2) @ questing2026-05-29ubuntu
ubunturedict-tools (7.3.2+ds-1ubuntu0.1) @ plucky2026-05-29ubuntu
ubunturedis-tools (2:3.0.6-1ubuntu0.4+esm5) @ xenial2026-05-29ubuntu
ubuntulua5.1-doc (5.1.5-8ubuntu1+esm1) @ xenial2026-05-29ubuntu
redhatopenshift-gitops-1/gitops-rhel8-operator:1.162025-12-15redhat
redhatopenshift-gitops-1/gitops-rhel8-operator:1.182025-12-15redhat
redhatopenshift-gitops-1/gitops-rhel8-operator:1.172025-12-15redhat
redhatvalkey-0:8.0.6-2.el10_12025-11-24redhat
redhatvalkey-0:8.0.6-2.el9_72025-11-24redhat
redhatredis-0:6.2.20-2.el9_72025-11-11redhat
redhatredis:7-9070020251016095039.92025-11-11redhat
redhatvalkey-0:8.0.6-1.el10_02025-11-04redhat
redhatredis:6-8080020251022085755.63b345852025-11-03redhat
redhatredis:6-8040020251022121413.522a0ee42025-10-30redhat
redhatredis:7-9060020251007094800.92025-10-30redhat
redhatredis-0:6.2.20-1.el9_62025-10-29redhat
redhatredis:6-8100020251007064521.489197e62025-10-29redhat
redhatredis:6-8060020251022110425.ad008a3a2025-10-29redhat
redhatredis-0:6.2.7-1.el9_4.52025-10-23redhat
redhatredis-0:6.2.7-1.el9_2.52025-10-23redhat
redhatredis-0:6.2.6-1.el9_0.52025-10-23redhat
redhatredis:7-9040020251015162111.92025-10-21redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Additional Vendor Advisories

(7)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 5× in last 7d / 17× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-07-15 01:59 UTCEPSS rescore
  2. 2026-07-15 01:59 UTCEPSS rescore
  3. 2026-07-13 06:12 UTCEPSS rescore
  4. 2026-07-11 08:27 UTCEPSS rescore
  5. 2026-07-11 08:27 UTCEPSS rescore
  6. 2026-07-06 13:00 UTCOSV refresh
  7. 2026-07-04 06:30 UTCEPSS rescore
  8. 2026-06-30 23:22 UTCEPSS rescore
  9. 2026-06-30 23:22 UTCEPSS rescore
  10. 2026-06-29 14:06 UTCEPSS rescore
  11. 2026-06-29 14:06 UTCEPSS rescore
  12. 2026-06-27 03:08 UTCEPSS rescore
  13. 2026-06-23 21:32 UTCEPSS rescore
  14. 2026-06-23 21:32 UTCEPSS rescore
  15. 2026-06-18 01:05 UTCOSV refresh
  16. 2026-06-17 17:52 UTCEPSS rescore
  17. 2026-06-17 17:52 UTCEPSS rescore
  18. 2026-06-15 17:48 UTCEPSS rescore
  19. 2026-06-14 23:17 UTCEPSS rescore
  20. 2026-06-13 23:00 UTCEPSS rescore
  21. 2026-06-12 23:11 UTCEPSS rescore
  22. 2026-06-11 14:00 UTCEPSS rescore
  23. 2026-06-11 14:00 UTCEPSS rescore
  24. 2026-06-10 22:18 UTCEPSS rescore
  25. 2026-06-10 22:18 UTCEPSS rescore
Show 21 more
  1. 2026-06-10 13:22 UTCEPSS rescore
  2. 2026-06-08 14:16 UTCEPSS rescore
  3. 2026-06-08 14:16 UTCEPSS rescore
  4. 2026-06-07 15:24 UTCEPSS rescore
  5. 2026-06-05 22:46 UTCEPSS rescore
  6. 2026-06-05 22:46 UTCEPSS rescore
  7. 2026-06-05 06:10 UTCEPSS rescore
  8. 2026-06-05 06:10 UTCEPSS rescore
  9. 2026-06-04 13:12 UTCEPSS rescore
  10. 2026-06-04 13:12 UTCEPSS rescore
  11. 2026-06-02 20:12 UTCEPSS rescore
  12. 2026-06-02 20:12 UTCEPSS rescore
  13. 2026-06-01 13:51 UTCEPSS rescore
  14. 2026-06-01 13:51 UTCEPSS rescore
  15. 2026-05-31 22:30 UTCEPSS rescore
  16. 2026-05-31 22:30 UTCEPSS rescore
  17. 2026-05-31 00:16 UTCEPSS rescore
  18. 2026-05-31 00:16 UTCEPSS rescore
  19. 2026-05-29 21:33 UTCEG score recompute
  20. 2026-05-29 21:33 UTCVendor advisory
  21. 2026-05-29 13:44 UTCEPSS rescore

Publicly available exploits

(3 references)

Working exploit code is in the public domain (2 GitHub PoCs). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • GitHub PoCsaneki/cve-2025-49844
    First seen Oct 31, 2025

    Proof-of-concept for CVE-2025-49844

    Open source ↗
  • Nucleijavascript/cves/2025/CVE-2025-49844.yaml
    First seen Jan 1, 2025

    Redis Lua Parser < 8.2.2 - Use After Free

    Open source ↗
  • GitHub PoCZain3311/CVE-2025-49844
    First seen Apr 6, 2022

    🚨 Exploit the CVE-2025-49844 Redis Lua interpreter UAF vulnerability to execute arbitrary shellcode and gain persistent backdoor access.

    Open source ↗

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2025-49844?
CVE-2025-49844 is a critical vulnerability published on October 3, 2025. Redis is an open source, in-memory database that persists on disk. Versions 8.2.1 and below allow an authenticated user to use a specially crafted Lua script to manipulate the garbage collector, trigger a use-after-free and potentially lead to remote code execution. The problem exists in all…
When was CVE-2025-49844 disclosed?
CVE-2025-49844 was first published in the National Vulnerability Database on October 3, 2025, with the most recent update on March 20, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2025-49844 actively exploited?
CVE-2025-49844 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 99.7% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2025-49844?
CVE-2025-49844 has a CVSS v3 base score of 9.9 (NVD).
How do I remediate CVE-2025-49844?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2025-49844, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2025-49844

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