NVD / CVE Program· CNA GitHub_M

CVE-2025-49844: Redis Lua Use-After-Free may lead to remote code execution

CriticalCVSS 9.9 · v3.1—Proof of concept Fix available

Noroxi assessment

Priority: This week (action score 64/100)

A ready-made attack module is public (Nuclei); exploiting it takes no special expertise.
Public proof-of-concept code exists (GitHub); there is no record of exploitation in the wild.
Probability of exploitation in the next 30 days: 83.1% (FIRST EPSS); higher than 99.6% of all records.
Anyone who can reach it over the internet can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
Fixed version: redis redis 8.2.2; cbl2 redis 6.2.18-3 on CBL Mariner 2.0 6.2.20-1.
Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Don’t wait for the next maintenance window. Upgrade to redis redis 8.2.2; cbl2 redis 6.2.18-3 on CBL Mariner 2.0 6.2.20-1 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

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.

Published: Oct 3, 2025
Updated: Oct 19, 2026
EPSS: 83.1% · 99th percentile
CWE: CWE-416

Report tools

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Action score

This week

Don’t wait for the next maintenance window.

CVSS: 39 / 40 · 9.9 / 10
CISA KEV: 0 / 30 · Not listed
EPSS: 25 / 30 · 83.1%

CISA SSVC decision

Exploitation: proof of concept
Automatable: no
Technical impact: total

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD: 9.9
CNA · GitHub_M: 9.9; agree

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

Not in KEV: no record of exploitation in the wild
Proof of concept exists, no weaponized module
A fix has been released

If any of these changes, we'll tell you in the daily email digest.

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Is your version affected? Check it

Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

Vendor	Product	CPE
redis	redis	cpe:2.3:a:redis:redis
lfprojects	valkey	cpe:2.3:a:lfprojects:valkey

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Versions reported by the vendor

Affected version ranges reported by the assigning authority (GitHub_M). Independent of NVD's CPE analysis and usually ahead of it.

redis redis
- < 8.2.2affected

Affected versions · NVD (8)

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

lfprojects valkeybefore 7.2.11
lfprojects valkey8.0.0 and later · before 8.0.6
lfprojects valkey8.1.0 and later · before 8.1.4
redis redis8.0.0 and later · before 8.0.4
redis redisbefore 6.2.20
redis redis8.2.0 and later · before 8.2.2
redis redis7.0 and later · before 7.2.11
redis redis7.4.0 and later · before 7.4.6

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

Ecosystem	Package	Affected range	Fix
AlmaLinux:10	valkey	before 8.0.6-2.el10_1	8.0.6-2.el10_1
AlmaLinux:10	valkey	before 8.0.6-1.el10_0	8.0.6-1.el10_0
AlmaLinux:10	valkey-devel	before 8.0.6-2.el10_1	8.0.6-2.el10_1
AlmaLinux:10	valkey-devel	before 8.0.6-1.el10_0	8.0.6-1.el10_0
AlmaLinux:8	redis	before 6.2.20-1.module_el8.10.0+4056+739731b0	6.2.20-1.module_el8.10.0+4056+739731b0
AlmaLinux:8	redis-devel	before 6.2.20-1.module_el8.10.0+4056+739731b0	6.2.20-1.module_el8.10.0+4056+739731b0
AlmaLinux:8	redis-doc	before 6.2.20-1.module_el8.10.0+4056+739731b0	6.2.20-1.module_el8.10.0+4056+739731b0
AlmaLinux:9	redis	before 6.2.20-2.el9_7	6.2.20-2.el9_7
AlmaLinux:9	redis	before 7.2.11-1.module_el9.6.0+188+92104ce8	7.2.11-1.module_el9.6.0+188+92104ce8
AlmaLinux:9	redis	before 6.2.20-1.el9_6	6.2.20-1.el9_6
AlmaLinux:9	redis-devel	before 7.2.11-1.module_el9.6.0+188+92104ce8	7.2.11-1.module_el9.6.0+188+92104ce8
AlmaLinux:9	redis-devel	before 6.2.20-1.el9_6	6.2.20-1.el9_6
AlmaLinux:9	redis-devel	before 6.2.20-2.el9_7	6.2.20-2.el9_7
AlmaLinux:9	redis-doc	before 7.2.11-1.module_el9.6.0+188+92104ce8	7.2.11-1.module_el9.6.0+188+92104ce8
AlmaLinux:9	redis-doc	before 6.2.20-1.el9_6	6.2.20-1.el9_6
AlmaLinux:9	redis-doc	before 6.2.20-2.el9_7	6.2.20-2.el9_7
AlmaLinux:9	valkey	before 8.0.6-2.el9_7	8.0.6-2.el9_7
AlmaLinux:9	valkey-devel	before 8.0.6-2.el9_7	8.0.6-2.el9_7
Alpine:v3.20	valkey	from 8.0.0 · before 7.2.11-r0	7.2.11-r0
Alpine:v3.21	redis	from 7.0 · before 7.2.11-r0	7.2.11-r0
Alpine:v3.22	redict	before 7.3.6-r0	7.3.6-r0
Alpine:v3.22	redis	from 7.0 · before 8.0.4-r0	8.0.4-r0
Alpine:v3.22	valkey	from 8.0.0 · before 8.1.4-r0	8.1.4-r0
Alpine:v3.23	redis	from 7.0 · before 8.2.2-r0	8.2.2-r0

+96

Same product

redis: all records

Other highest-scoring records for the same primary product.

CVE-2022-0543It was discovered, that redis, a persistent key-value database, due to a packaging issue, is prone to a (Debian-specific) Lua sandbox…KEV
100Now
CVE-2023-36824Heap overflow in COMMAND GETKEYS and ACL evaluation in Redis
58Plan
CVE-2022-24834Heap overflow issue with the Lua cjson library used by Redis
47Plan

Published before and after this one in the same product

← EarlierCVE-2025-46818Oct 3, 2025 · Redis: Authenticated users can execute LUA scripts as a different user
29Monitor
← EarlierCVE-2025-46819Oct 3, 2025 · Redis is vulnerable to DoS via specially crafted LUA scripts
28Monitor
Later →CVE-2025-62507Nov 4, 2025 · Redis: Bug in XACKDEL may lead to stack overflow and potential RCE
32Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / package	Fixed version	Source
redis redis	8.2.2 · description	Vendor (CNA)
cbl2 redis 6.2.18-3 on CBL Mariner 2.0	6.2.20-1 · CBL-Mariner Releases	Microsoft (MSRC)
almalinux:redis	6.2.20-1.el9_6 · AlmaLinux:9	Package registry (OSV)
almalinux:redis-devel	6.2.20-1.el9_6 · AlmaLinux:9	Package registry (OSV)
almalinux:redis-doc	6.2.20-1.el9_6 · AlmaLinux:9	Package registry (OSV)
almalinux:valkey	8.0.6-1.el10_0 · AlmaLinux:10	Package registry (OSV)
almalinux:valkey-devel	8.0.6-1.el10_0 · AlmaLinux:10	Package registry (OSV)
alpine:redict	7.3.6-r0 · Alpine:v3.22	Package registry (OSV)
alpine:redis	7.2.11-r0 · Alpine:v3.21	Package registry (OSV)
alpine:valkey	7.2.11-r0 · Alpine:v3.20	Package registry (OSV)
debian:redict	7.3.6+ds-1 · Debian:14	Package registry (OSV)
debian:redis	5:7.0.15-1~deb12u6 · Debian:12	Package registry (OSV)
debian:valkey	8.1.1+dfsg1-3+deb13u1 · Debian:13	Package registry (OSV)
opensuse:redis	7.2.4-150600.3.18.1 · openSUSE:Leap 15.6	Package registry (OSV)
opensuse:redis7	7.0.8-150600.8.19.1 · openSUSE:Leap 15.6	Package registry (OSV)
opensuse:valkey	8.0.6-150600.13.17.1 · openSUSE:Leap 15.6	Package registry (OSV)
red hat:redis	0:7.0.12-2.module+el9.4.0+23556+1eb46139.6 · Red Hat:rhel_eus:9.4::appstream	Package registry (OSV)
red hat:redis-debuginfo	0:7.0.12-2.module+el9.4.0+23556+1eb46139.6 · Red Hat:rhel_eus:9.4::appstream	Package registry (OSV)
red hat:redis-debugsource	0:7.0.12-2.module+el9.4.0+23556+1eb46139.6 · Red Hat:rhel_eus:9.4::appstream	Package registry (OSV)
red hat:redis-devel	0:7.0.12-2.module+el9.4.0+23556+1eb46139.6 · Red Hat:rhel_eus:9.4::appstream	Package registry (OSV)
red hat:redis-doc	0:7.0.12-2.module+el9.4.0+23556+1eb46139.6 · Red Hat:rhel_eus:9.4::appstream	Package registry (OSV)
red hat:valkey	0:8.0.6-1.el10_0 · Red Hat:enterprise_linux:10.0	Package registry (OSV)
red hat:valkey-debuginfo	0:8.0.6-1.el10_0 · Red Hat:enterprise_linux:10.0	Package registry (OSV)
red hat:valkey-debugsource	0:8.0.6-1.el10_0 · Red Hat:enterprise_linux:10.0	Package registry (OSV)
red hat:valkey-devel	0:8.0.6-1.el10_0 · Red Hat:enterprise_linux:10.0	Package registry (OSV)
rocky linux:redis	0:6.2.20-1.el9_6 · Rocky Linux:9	Package registry (OSV)
rocky linux:valkey	0:8.0.6-1.el10_0 · Rocky Linux:10	Package registry (OSV)
suse:redis	7.2.4-150600.3.18.1 · SUSE:Linux Enterprise Module for Server Applications 15 SP6	Package registry (OSV)
suse:redis7	7.0.8-150600.8.19.1 · SUSE:Linux Enterprise Module for Server Applications 15 SP6	Package registry (OSV)
suse:valkey	8.0.6-150600.13.17.1 · SUSE:Linux Enterprise Module for Server Applications 15 SP6	Package registry (OSV)

Exploit status

Proof of concept available

A public proof of concept or detection signature exists. Exploit knowledge is out there; don't delay patching.

Evidence

Nuclei detection template ×1
Proof-of-concept repository on GitHub ×19

Noroxi does not host or link to exploit code. Metasploit module names and Nuclei template ids are shown (names, not code); Exploit-DB entries and PoC repositories are given as counts only.

Public exploit evidence
Source	Kind	Date
Proof-of-concept repository on GitHub	19 repositories	2019-04-13 → 2026-06-16
Nuclei detection template	Nuclei template CVE-2025-49844	—

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

First PoCApr 13, 2019-2366 d
PublishedOct 3, 2025
TodayNov 14, 2026+406 d

EPSS, last 120 days+1% in 7 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

redis/rediscommit d5728cb

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

CVE-2024-46981270 days apartRedis' Lua library commands may lead to remote code execution
41Plan
CVE-2026-23479214 days apartredis-server use-after-free in unblock client flow may allow remote code execution
31Monitor
CVE-2026-81934328 days apartRedis TLS pending-data list use-after-free
30Monitor
CVE-2026-23631214 days apartredis-server Lua use-after-free may allow remote code execution
25Monitor

Bug bounty scope

Redis VDPHackerOne · disclosure only (VDP)

The product’s vendor appears in a public program. Matched by name; verify the scope text in the program.

National notice (Türkiye Cybersecurity Directorate / USOM)

Official security notices citing this record; remediation advice is on the agency's page.

TR-25-0315 · Oct 6, 2025(Redis Güvenlik Zafiyeti)

All national notices →

Not on record for this CVE: researcher credit.

Technical details

Attack conditions

Anyone who can reach it over the internet can trigger it.
A low-privileged account is enough.
No user action is required.
No special conditions are required; it is repeatable.

If successful

Confidentiality: high · data can be read
Integrity: high · data or configuration can be modified
Availability: high · the service can be disrupted

Impact can extend beyond the vulnerable component (scope changes).

Attack vector: Network
Attack complexity: Low
Privileges required: Low
User interaction: None
Scope: Changed
Confidentiality impact: High
Integrity impact: High
Availability impact: High

Weakness class (CWE)

CWE-416 · Use After Free

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

nvd-primary

Root cause

After a memory region is freed, another reference pointing to it is still used. By then, the same region may have been allocated for different data.

The bug in code

The whole CWE-416 class

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

Vulnerable

1free(dev->buf);
2/* ... another thread is still running ... */
3process(dev->buf);

Fixed

1lock(&dev->lock);
2free(dev->buf);
3dev->buf = NULL;
4unlock(&dev->lock);

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log (1)

Fix✗ → ✓Sep 28, 2026, 10:46 PM UTC

For records you follow, these changes also arrive as notifications. →

References

github.com/redis/redis/commit/d5728cb5795c966c5b5b1e0f0ac576a7e69af539

Show all references (3 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records

Noroxi analysis

What does it mean in your environment?

We use this product, ask for help

Data sources and verification

CNA: GitHub_M

CVE.org (CNA)Mar 20, 2026, 2:08 PM UTC
CISA ADPMar 20, 2026, 2:08 PM UTC
NVDOct 19, 2026, 4:10 PM UTC
FIRST EPSSNov 12, 2026, 12:00 AM UTC
OSV / GHSANov 13, 2026, 3:18 AM UTC
MSRCOct 13, 2026, 3:24 AM UTC
NucleiNov 13, 2026, 3:18 AM UTC
PoC-in-GitHubNov 13, 2026, 3:18 AM UTC

Each line is when that source was last processed for this record.

CVE-2025-49844: Redis Lua Use-After-Free may lead to remote code execution

Noroxi assessment

Get told when this record changes

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What does it mean in your environment?

Affected systems

Is your version affected?

Watch new CVEs for redis

Versions reported by the vendor

Package-level exposure

Same product

Remediation

Which version to upgrade to

Exploit status

Research context

Timeline

Patch and commit links

Variant candidates

National notice (Türkiye Cybersecurity Directorate / USOM)

Technical details

Attack conditions

If successful

Root cause

The bug in code

Attack context

References