CVE-2025-49844

CRITICALNVD 9.99.9
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to NVD's CVSS score.

This critical-severity CVE scores 9.9 under NVD CVSS v3. EPSS exploit probability: 82% (99th percentile of EPSS-scored CVEs). No GitHub Security Advisory CVSS is on record for this CVE.

Triggered by: Headline CVSS from NVD CVSS v3
Sources: EPSS, NVD CVSS v3
Trending — 3 sources updated this weekWeaponized
9.9EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines at low or medium mission impact and sooner than that at high (the SSVC decision on this page).
  • High exploitation likelihood — EPSS 82%
  • Public exploit or proof-of-concept code is available
CISA-KEV: Not listedEPSS PROB: 82%CVSS: 9.9Exploit: Public PoCExposed services: Not assessed

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
9.9CRITICALmedium confidence
EG Risk
77
EG Risk 77/100

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed (value × EchelonGraph’s weight)
Severity99% × 45%
The EG Score, 9.9 of 10.
Exploitation82% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low, Track* at medium and Attend at high mission impact.
Exploitation public PoC (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
82%
EPSS %ILE
99th
KEV
Not listed

SSVC (CISA's decision table, applied by EchelonGraph)Track at low, Track* at medium and Attend at high mission impact.

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation public PoC (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

October 3, 2025

Last Modified

March 20, 2026

Advisory Details (5)

Auto-updated Oct 13, 2026
Patch available. Sources: github_commit, github_release, github.
Web page

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

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

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 advisoryMentions a patch (unverified)

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 8.2.7 (contains commit d5728cb5795c)

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

Vendor Advisories for CVE-2025-49844(19)

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 / EcosystemFix (by version range) / PatchReleasedSource
ubunturedis-tools (5:7.0.15-1ubuntu0.24.04.2) @ noble2026-10-15ubuntu
ubuntuvalkey-tools (8.0.6+dfsg1-0ubuntu0.2) @ plucky2026-10-15ubuntu
ubuntulua5.1-doc (5.1.5-8ubuntu1+esm1) @ xenial2026-10-15ubuntu
ubunturedis-tools (5:6.0.16-1ubuntu1.1) @ jammy2026-10-15ubuntu
ubunturedis-tools (2:3.0.6-1ubuntu0.4+esm5) @ xenial2026-10-15ubuntu
ubunturedict-tools (7.3.2+ds-1ubuntu0.1) @ plucky2026-10-15ubuntu
redhatopenshift-gitops-1/gitops-rhel8-operator:1.172025-12-15redhat
redhatopenshift-gitops-1/gitops-rhel8-operator:1.162025-12-15redhat
redhatopenshift-gitops-1/gitops-rhel8-operator:1.182025-12-15redhat
redhatvalkey-0:8.0.6-2.el10_12025-11-24redhat
redhatvalkey-0:8.0.6-2.el9_72025-11-24redhat
redhatredis:7-9070020251016095039.92025-11-11redhat
redhatredis-0:6.2.20-2.el9_72025-11-11redhat
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:6-8060020251022110425.ad008a3a2025-10-29redhat
redhatredis:6-8100020251007064521.489197e62025-10-29redhat
redhatredis-0:6.2.7-1.el9_2.52025-10-23redhat
redhatredis-0:6.2.6-1.el9_0.52025-10-23redhat
redhatredis-0:6.2.7-1.el9_4.52025-10-23redhat
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.

Affected Packages

(12 across 9 ecosystems)
Debian:14(3)
PackageVulnerable rangeFix by version rangeDependents
redict7.3.0+ds-1 ... 7.3.6+ds-1~bpo13+1 (11 versions)
  • every version up to 7.3.6+ds-1: fixed in 7.3.6+ds-1
—
redis5:8.0.2-3
  • every version up to 5:8.0.4-1: fixed in 5:8.0.4-1
—
valkey8.1.1+dfsg1-3
  • every version up to 8.1.4+dfsg1-1: fixed in 8.1.4+dfsg1-1
—
Debian:13(2)
PackageVulnerable rangeFix by version rangeDependents
redis5:8.0.2-3
  • every version up to 5:8.0.2-3+deb13u1: fixed in 5:8.0.2-3+deb13u1
—
valkey8.1.1+dfsg1-3
  • every version up to 8.1.1+dfsg1-3+deb13u1: fixed in 8.1.1+dfsg1-3+deb13u1
—
Alpine:v3.20(1)
PackageVulnerable rangeFix by version rangeDependents
valkey—
  • 8.0.0 up to 7.2.11-r0: fixed in 7.2.11-r0
—
Alpine:v3.21(1)
PackageVulnerable rangeFix by version rangeDependents
valkey—
  • 8.0.0 up to 7.2.11-r0: fixed in 7.2.11-r0
—
Alpine:v3.22(1)
PackageVulnerable rangeFix by version rangeDependents
valkey—
  • 8.0.0 up to 8.1.4-r0: fixed in 8.1.4-r0
—
Alpine:v3.23(1)
PackageVulnerable rangeFix by version rangeDependents
valkey—
  • 8.0.0 up to 8.1.4-r0: fixed in 8.1.4-r0
—
Alpine:v3.24(1)
PackageVulnerable rangeFix by version rangeDependents
valkey—
  • 8.0.0 up to 8.1.4-r0: fixed in 8.1.4-r0
—
Debian:11(1)
PackageVulnerable rangeFix by version rangeDependents
redis5:6.0.15-1 ... 5:6.0.16-1~bpo11+1 (11 versions)
  • every version up to 5:6.0.16-1+deb11u8: fixed in 5:6.0.16-1+deb11u8
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
redis5:7.0.11-1 ... 5:7.0.15-1~deb12u5 (13 versions)
  • every version up to 5:7.0.15-1~deb12u6: fixed in 5:7.0.15-1~deb12u6
—

Weakness Classification(1)

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

Additional Vendor Advisories

(6)

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 14× in last 7d / 26× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

Showing the most recent 81 of 89 refreshes on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. 19 repeat rows among the latest 100 are merged into the row they repeat. The 8 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-15 16:16 UTCEG score recompute
  2. 2026-10-15 16:16 UTCVendor advisory
  3. 2026-10-14 16:31 UTCEPSS rescoreEPSS 82% · 99th percentile
  4. 2026-10-14 10:21 UTCEG score recompute
  5. 2026-10-14 10:21 UTCVendor advisory
  6. 2026-10-13 16:32 UTCEPSS rescoreEPSS 82% · 99th percentile
  7. 2026-10-13 08:49 UTCVendor advisory
  8. 2026-10-12 16:59 UTCEG score recompute
  9. 2026-10-12 16:33 UTCEPSS rescoreEPSS 82% · 99th percentile
  10. 2026-10-12 11:01 UTCVendor advisory
  11. 2026-10-11 20:33 UTCEG score recompute
  12. 2026-10-11 18:45 UTCEG score recompute
  13. 2026-10-11 15:20 UTCEG score recompute
  14. 2026-10-10 19:59 UTCEPSS rescoreEPSS 82% · 99th percentile
  15. 2026-10-07 23:47 UTCEPSS rescoreEPSS 82% · 99th percentile
  16. 2026-10-05 17:42 UTCEPSS rescoreEPSS 82% · 99th percentile
  17. 2026-10-02 03:11 UTCOSV refresh
  18. 2026-09-30 15:02 UTCEPSS rescoreEPSS 82% · 99th percentile
  19. 2026-09-28 13:50 UTCEPSS rescoreEPSS 82% · 99th percentile
  20. 2026-09-26 15:58 UTCEPSS rescoreEPSS 82% · 99th percentile
  21. 2026-09-26 00:25 UTCEPSS rescoreEPSS 82% · 99th percentile
  22. 2026-09-24 14:02 UTCEPSS rescoreEPSS 82% · 99th percentile
  23. 2026-09-23 13:47 UTCEPSS rescoreEPSS 82% · 99th percentile
  24. 2026-09-21 21:06 UTCEPSS rescoreEPSS 82% · 99th percentile
  25. 2026-09-18 19:27 UTCEPSS rescoreEPSS 82% · 99th percentile
Show 56 more
  1. 2026-09-16 14:07 UTCEPSS rescoreEPSS 82% · 99th percentile
  2. 2026-09-12 21:06 UTCOSV refresh
  3. 2026-09-11 14:52 UTCEPSS rescoreEPSS 82% · 99th percentile
  4. 2026-09-10 09:34 UTCEPSS rescoreEPSS 82% · 99th percentile
  5. 2026-09-08 21:59 UTCEPSS rescoreEPSS 82% · 99th percentile
  6. 2026-09-06 13:46 UTCEPSS rescoreEPSS 82% · 99th percentile
  7. 2026-09-05 15:28 UTCEPSS rescoreEPSS 82% · 99th percentile
  8. 2026-09-04 05:06 UTCEPSS rescoreEPSS 82% · 99th percentile
  9. 2026-09-02 14:11 UTCEPSS rescoreEPSS 87% · 99th percentile
  10. 2026-08-30 19:16 UTCEPSS rescoreEPSS 87% · 99th percentile
  11. 2026-08-28 21:40 UTCEPSS rescoreEPSS 87% · 99th percentile
  12. 2026-08-26 14:45 UTCEPSS rescoreEPSS 87% · 99th percentile
  13. 2026-08-25 13:48 UTCEPSS rescoreEPSS 87% · 99th percentile
  14. 2026-08-25 01:56 UTCOSV refresh
  15. 2026-08-24 14:16 UTCEPSS rescoreEPSS 87% · 99th percentile
  16. 2026-08-24 09:22 UTCEPSS rescoreEPSS 87% · 99th percentile
  17. 2026-08-21 23:48 UTCEPSS rescoreEPSS 87% · 99th percentile
  18. 2026-08-19 17:03 UTCEPSS rescoreEPSS 87% · 99th percentile
  19. 2026-08-15 01:29 UTCEPSS rescoreEPSS 87% · 99th percentile
  20. 2026-08-11 13:41 UTCEPSS rescoreEPSS 87% · 99th percentile
  21. 2026-08-08 19:25 UTCOSV refresh
  22. 2026-08-04 10:37 UTCEPSS rescoreEPSS 87% · 99th percentile
  23. 2026-08-03 10:35 UTCEPSS rescoreEPSS 87% · 99th percentile
  24. 2026-08-01 04:15 UTCEPSS rescoreEPSS 87% · 99th percentile
  25. 2026-07-25 14:17 UTCEPSS rescoreEPSS 87% · 99th percentile
  26. 2026-07-24 14:17 UTCEPSS rescoreEPSS 87% · 99th percentile
  27. 2026-07-23 18:11 UTCOSV refresh
  28. 2026-07-23 02:57 UTCEG score recompute
  29. 2026-07-22 14:07 UTCEPSS rescoreEPSS 87% · 99th percentile
  30. 2026-07-20 17:07 UTCEPSS rescoreEPSS 87% · 99th percentile
  31. 2026-07-16 17:02 UTCEPSS rescoreEPSS 87% · 99th percentile
  32. 2026-07-15 01:59 UTCEPSS rescoreEPSS 87% · 99th percentile
  33. 2026-07-13 06:12 UTCEPSS rescoreEPSS 87% · 99th percentile
  34. 2026-07-11 08:27 UTCEPSS rescoreEPSS 87% · 99th percentile
  35. 2026-07-06 13:00 UTCOSV refresh
  36. 2026-07-04 06:30 UTCEPSS rescoreEPSS 87% · 99th percentile
  37. 2026-06-30 23:22 UTCEPSS rescoreEPSS 87% · 99th percentile
  38. 2026-06-29 14:06 UTCEPSS rescoreEPSS 87% · 99th percentile
  39. 2026-06-27 03:08 UTCEPSS rescoreEPSS 86% · 99th percentile
  40. 2026-06-23 21:32 UTCEPSS rescoreEPSS 86% · 99th percentile
  41. 2026-06-18 01:05 UTCOSV refresh
  42. 2026-06-17 17:52 UTCEPSS rescoreEPSS 86% · 99th percentile
  43. 2026-06-15 17:48 UTCEPSS rescoreEPSS 86% · 99th percentile
  44. 2026-06-14 23:17 UTCEPSS rescoreEPSS 11% · 93rd percentile
  45. 2026-06-13 23:00 UTCEPSS rescoreEPSS 11% · 93rd percentile
  46. 2026-06-12 23:11 UTCEPSS rescoreEPSS 11% · 93rd percentile
  47. 2026-06-11 14:00 UTCEPSS rescoreEPSS 11% · 93rd percentile
  48. 2026-06-10 22:18 UTCEPSS rescoreEPSS 11% · 93rd percentile
  49. 2026-06-10 13:22 UTCEPSS rescoreEPSS 11% · 93rd percentile
  50. 2026-06-08 14:16 UTCEPSS rescoreEPSS 11% · 93rd percentile
  51. 2026-06-07 15:24 UTCEPSS rescoreEPSS 11% · 93rd percentile
  52. 2026-06-05 22:46 UTCEPSS rescoreEPSS 11% · 93rd percentile
  53. 2026-06-05 06:10 UTCEPSS rescoreEPSS 11% · 93rd percentile
  54. 2026-06-04 13:12 UTCEPSS rescoreEPSS 11% · 93rd percentile
  55. 2026-06-02 20:12 UTCEPSS rescoreEPSS 11% · 93rd percentile
  56. 2026-06-01 13:51 UTCEPSS rescoreEPSS 11% · 93rd percentile

Publicly available exploits

(9 references)

Public exploit code is referenced for this CVE (8 GitHub PoCs), as is 1 Nuclei detection template. A detection template checks whether a system is affected; it is not necessarily exploit code. Defenders should treat patch urgency accordingly.

  • GitHub PoCsaneki/cve-2025-49844
    Published Oct 31, 2025

    Proof-of-concept for CVE-2025-49844

    Open source ↗
  • Nucleijavascript/cves/2025/CVE-2025-49844.yaml
    Published Oct 11, 2025

    Redis Lua Parser < 8.2.2 - Use After Free

    Open source ↗
  • GitHub PoCMiclelsonCN/CVE-2025-49844_POC
    Published Oct 9, 2025

    CVE-2025-49844 POC

    Open source ↗
  • GitHub PoCpedrorichil/CVE-2025-49844
    Published Oct 8, 2025
    Open source ↗
  • GitHub PoCdwisiswant0/CVE-2025-49844
    Published Oct 7, 2025

    CVE-2025-49844 – Redis Lua Parser Use-After-Free

    Open source ↗
  • GitHub PoClastvocher/redis-CVE-2025-49844
    Published Oct 7, 2025
    Open source ↗
  • GitHub PoCraminfp/redis_exploit
    Published Oct 7, 2025

    CVE-2025-49844 (RediShell)

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

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

    Open source ↗
  • GitHub PoCksnnd32/redis_exploit
    Published Apr 13, 2019

    🔍 Explore and test the CVE-2025-49844 (RediShell) vulnerability in Redis with this practical lab environment for secure education and research.

    Open source ↗

Related CVEs(same product + same vendor + same CWE)

Frequently asked(5)

What is CVE-2025-49844?
CVE-2025-49844 is a critical-severity vulnerability; its CVE record was 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 the CVE record for CVE-2025-49844 published?
The CVE record for CVE-2025-49844 was published on October 3, 2025. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of March 20, 2026; the record at its source may have been updated since.
Is CVE-2025-49844 actively exploited?
CVE-2025-49844 is not currently on CISA's Known Exploited Vulnerabilities catalog. EchelonGraph's EG-KEV model places it in Tier 2 (Weaponized), which is not evidence of exploitation: CISA's SSVC data says a public PoC exists and its EPSS is 50% or more. EchelonGraph does not test whether exploit code works. FIRST EPSS estimates a 82% probability of exploitation in the next 30 days (99th percentile of EPSS-scored CVEs).
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?
A fix for CVE-2025-49844 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2025-49844 are linked in the Vendor Advisories panel on this page.

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