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CVE-2025-49844

Exploitation: poc CVSS 10.0 CRITICAL

CVSS base score: 10.0 (Critical) vendor CNA · v3.1

Score assigned by the vendor's own CVE Numbering Authority (CNA); CISA's Vulnrichment program adds a score only when the CNA omits one. Vulnrichment source record →

Vendor: redis   Product: redis

Description

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.

Research & News Coverage

No mentions found in monitored research blogs or news feeds.

Referenced in Advisories

DateAdvisoryIssuer
2026-03-24 ICSA-26-083-03: "Schneider Electric Plant iT/Brewmaxx" CISA

Lifecycle Timeline

Each milestone comes from a different source, so gaps between them are gaps in what those sources publish, not evidence that nothing happened. EPSS history for this CVE holds 8 points from 2026-11-05, tracked daily from 2026-11-05; earlier points are weekly, which dates a spike to within a week. Peak probability 83.2% on 2026-11-12.

Published Applicability

Red Hat CSAF/VEX 0 affected · 298 fixed · 261 not affected
OSV.dev (incl. GHSA) 22 affected · 22 fixed · 0 not affected
CVE List v5 (CNA container) 1 affected · 0 fixed · 0 not affected

Check whether a specific version is affected →

What each source publishes about which product versions carry this vulnerability, kept as written rather than merged. Absence here means no source has published applicability data, not that nothing is affected.

Detection & Exploitation

Exploit / Pen Test
Network IDS/IPS
none published
Host / SIEM
none published

Coverage across public collections only: Nuclei and OpenVAS NVT (scan); Snort and Suricata ET Open (network); Sigma and YARA (host/SIEM); Metasploit, Exploit-DB, public GitHub repositories and NVD exploit references (exploit). Absence here means nothing public was found, not that detection is impossible.
GitHub PoC repositories are collected automatically by PoC-in-GitHub (CC0) and filtered to repositories that are still online, contain code, and are starred or at least two weeks old. They are still not vetted: some are fakes and some are malware. Treat them as evidence that code was published, not as code to run.
NVD exploit references are links NVD's analysts tag as exploits; they confirm an exploit was referenced but carry no date. This product uses data from the NVD but is not endorsed or certified by the NVD.
OpenVAS coverage derives from the Greenbone Community Feed, made available under the Open Database License (ODbL) v1.0; its individual Vulnerability Tests are licensed GNU GPL v2.

First seenToolEvidenceEarliest reference
2025-10-07 GitHub PoC Unvetted — public repository dwisiswant0/CVE-2025-49844 +16 more

Metasploit is dated by the first commit of the module file, Exploit-DB by its publication date, and GitHub repositories by their creation date. GitHub PoC repositories are filtered (still online, contain code, starred or at least two weeks old) but not vetted: some are fakes and some are malware, so they show that code was published, not that it works or is safe to run. Evidence tiers are explained on the About page.

Distribution Status

Debian · redict forky 7.3.6+ds-1 sid 7.3.6+ds-1 scope: local
Debian · redis bookworm 5:7.0.15-1~deb12u6 trixie 5:8.0.2-3+deb13u1 forky 5:8.0.4-1 sid 5:8.0.4-1 scope: local
Debian · valkey trixie 8.1.1+dfsg1-3+deb13u1 forky 8.1.4+dfsg1-1 sid 8.1.4+dfsg1-1 scope: local

Where the distribution has shipped a fix, and in which version. Green means the release has resolved it, amber that it is still open. Data from the Debian Security Tracker, used under Debian's MIT / GPLv2+ terms. Debian is upstream of several other distributions, so a fix here often precedes theirs.

Fix & Cross-References

Patch and commit links and ecosystem advisory ids as published by OSV.dev. Links are listed as published, not vetted.

CISA Assessment (Vulnrichment / SSVC)

poc
no
total
—
10.0 CRITICAL
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
CWE-416 — Use After Free
2025-10-03

Federal Remediation Window (BOD 26-04)

No
no
total control
If the asset isRemediate withinTable 1 row
Publicly exposed 14 days 7 of 16
Not publicly exposed Fix on system upgrade 15 of 16

BOD 26-04 replaced the single KEV deadline of BOD 22-01 with four inputs: whether the asset is publicly exposed, KEV status, whether exploitation is automatable, and technical impact. Exposure belongs to each agency's asset, not to the CVE, so both outcomes are shown. Automatable and technical impact come from the CISA assessment above. Days are calendar days; for KEV entries the clock starts on the date it was added, and otherwise when the agency identifies the vulnerability on an asset. Agencies make the final exposure call asset by asset, and may set shorter timelines.

D3FEND Countermeasures

Defensive techniques inferred by MITRE D3FEND from the underlying weakness (CWE-416) — general hardening and detection guidance for this weakness class, not a vendor patch for this specific CVE.

External References