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CVE-2026-82677

valkey-io valkey Module Timer module.c moduleTimerHandler double free

4.8 MediumFix available

A vulnerability was determined in valkey-io valkey 9.1.0. Impacted is the function moduleTimerHandler of the file src/module.c of the component Module Timer Subsystem. This manipulation causes double free. The attack can be initiated remotely. The exploit has been publicly disclosed and may be utilized. Patch name: b349fe2821e3998534b1454c1b64a478daf8c6b7. To fix this issue, it is recommended to deploy a patch.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
High
User interaction
Passive

What an attacker can affect

Confidentiality
None
Integrity
None
Availability
Low

Exploit likelihood

0.29%Unchanged since Sep 1, 2026
90%50%10%1%

What each source reports

CVE List Score used 4.8

valkey-io valkey Module Timer module.c moduleTimerHandler double free

A vulnerability was determined in valkey-io valkey 9.1.0. Impacted is the function moduleTimerHandler of the file src/module.c of the component Module Timer Subsystem. This manipulation causes double free. The attack can be initiated remotely. The exploit has been publicly disclosed and may be utilized. Patch name: b349fe2821e3998534b1454c1b64a478daf8c6b7. To fix this issue, it is recommended to deploy a patch.

Record
CVE-2026-82677
CVSS 4.0
4.8 MediumCVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P
CVSS 3.1
2.4 LowCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C
CVSS 3.0
2.4 LowCVSS:3.0/AV:N/AC:L/PR:H/UI:R/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C
CVSS 2.0
3.3 AV:N/AC:L/Au:M/C:N/I:N/A:P/E:POC/RL:OF/RC:C
Weakness
CWE-415, CWE-119
Updated
2026-11-02
EUVDEUVD-2026-68457 4.8

A vulnerability was determined in valkey-io valkey 9.1.0. Impacted is the function moduleTimerHandler of the file src/module.c of the component Module Timer Subsystem. This manipulation causes double free. The attack can be initiated remotely. The exploit has been publicly disclosed and may be utilized. Patch name: b349fe2821e3998534b1454c1b64a478daf8c6b7. To fix this issue, it is recommended to deploy a patch.

Record
EUVD-2026-68457
CVSS 4.0
4.8 MediumCVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P
Updated
2026-11-02
GitHub AdvisoriesGHSA-pjvh-64mj-595g 1.9

A vulnerability was determined in valkey-io valkey 9.1.0. Impacted is the function...

A vulnerability was determined in valkey-io valkey 9.1.0. Impacted is the function moduleTimerHandler of the file src/module.c of the component Module Timer Subsystem. This manipulation causes double free. The attack can be initiated remotely. The exploit has been publicly disclosed and may be utilized. Patch name: b349fe2821e3998534b1454c1b64a478daf8c6b7. To fix this issue, it is recommended to deploy a patch.

Record
GHSA-pjvh-64mj-595g
CVSS 4.0
1.9 LowCVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P/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
CVSS 3.1
2.4 LowCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:N/I:N/A:L
Weakness
CWE-119
Updated
2026-11-02
NVD 1.9

A vulnerability was determined in valkey-io valkey 9.1.0. Impacted is the function moduleTimerHandler of the file src/module.c of the component Module Timer Subsystem. This manipulation causes double free. The attack can be initiated remotely. The exploit has been publicly disclosed and may be utilized. Patch name: b349fe2821e3998534b1454c1b64a478daf8c6b7. To fix this issue, it is recommended to deploy a patch.

Record
CVE-2026-82677
CVSS 4.0
1.9 LowCVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P/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
CVSS 3.1
2.4 LowCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:N/I:N/A:L
CVSS 2.0
3.3 LowAV:N/AC:L/Au:M/C:N/I:N/A:P
Weakness
CWE-119, CWE-415
Updated
2026-11-02
OSVBELL-CVE-2026-82677 2.4
Record
BELL-CVE-2026-82677
CVSS 3.1
2.4 LowCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:N/I:N/A:L
Updated
2026-11-02
OSV 1.9

valkey-io valkey Module Timer module.c moduleTimerHandler double free

A vulnerability was determined in valkey-io valkey 9.1.0. Impacted is the function moduleTimerHandler of the file src/module.c of the component Module Timer Subsystem. This manipulation causes double free. The attack can be initiated remotely. The exploit has been publicly disclosed and may be utilized. Patch name: b349fe2821e3998534b1454c1b64a478daf8c6b7. To fix this issue, it is recommended to deploy a patch.

Record
CVE-2026-82677
CVSS 4.0
1.9 LowCVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P
Weakness
CWE-119, CWE-415
Updated
2026-11-02
OSVDEBIAN-CVE-2026-82677 1.9

A vulnerability was determined in valkey-io valkey 9.1.0. Impacted is the function moduleTimerHandler of the file src/module.c of the component Module Timer Subsystem. This manipulation causes double free. The attack can be initiated remotely. The exploit has been publicly disclosed and may be utilized. Patch name: b349fe2821e3998534b1454c1b64a478daf8c6b7. To fix this issue, it is recommended to deploy a patch.

Record
DEBIAN-CVE-2026-82677
CVSS 4.0
1.9 LowCVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P/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
Updated
2026-11-02
OSVRHSA-2026:61884 8.8

Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update

Record
RHSA-2026:61884
CVSS 3.1
8.8 HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVUBUNTU-CVE-2026-82677 1.9

A vulnerability was determined in valkey-io valkey 9.1.0. Impacted is the function moduleTimerHandler of the file src/module.c of the component Module Timer Subsystem. This manipulation causes double free. The attack can be initiated remotely. The exploit has been publicly disclosed and may be utilized. Patch name: b349fe2821e3998534b1454c1b64a478daf8c6b7. To fix this issue, it is recommended to deploy a patch.

Record
UBUNTU-CVE-2026-82677
CVSS 4.0
1.9 LowCVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P
CVSS 3.1
2.4 LowCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:N/I:N/A:L
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
valkey
Alpaquita:25
 8.1.6-r0 up to 8.1.10-r0
8.1.10-r0
valkey
Alpaquita:stream
 9.0.3-r0 up to 9.0.6-r0
9.0.6-r0
redict
Debian:14
 All versions, plus listed versions
7.3.0+ds-17.3.0+ds-27.3.0+ds-37.3.0+ds-3~bpo12+17.3.1+ds-1
Show 11 moreShow less
7.3.2+ds-17.3.2+ds-1~bpo12+17.3.5+ds-17.3.5+ds-1~bpo12+17.3.6+ds-17.3.6+ds-1~bpo12+17.3.6+ds-1~bpo13+17.3.6+ds-27.3.6+ds-2~bpo12+17.3.6+ds-2~bpo13+17.3.6+ds-3
 None known
redis
Debian:12
 All versions, plus listed versions
5:7.0.11-15:7.0.11-1+deb12u15:7.0.12-15:7.0.12-25:7.0.13-1
Show 44 moreShow less
5:7.0.13-25:7.0.14-15:7.0.14-25:7.0.15-15:7.0.15-1~deb12u15:7.0.15-1~deb12u105:7.0.15-1~deb12u25:7.0.15-1~deb12u35:7.0.15-1~deb12u45:7.0.15-1~deb12u55:7.0.15-1~deb12u65:7.0.15-1~deb12u75:7.0.15-1~deb12u85:7.0.15-1~deb12u95:7.0.15-25:7.0.15-35:7.0.15-3.15:7.2-rc2-15:7.2-rc3-15:7.2.0-15:7.2.0-25:7.2.1-15:7.2.1-25:7.2.2-15:7.2.2-25:7.2.3-15:7.2.4-15:7.2.5-15:7.2.5-25:7.2.5-35:7.2~rc1-15:8.0.0-15:8.0.0-25:8.0.2-25:8.0.2-35:8.0.4-15:8.0.5-15:8.0.6-15:8.0.6-25:8.0.6-35:8.4.0-15:8.6.1-15:8.6.2-15:8.6.3-1
 None known
redis
Debian:13
 All versions, plus listed versions
5:8.0.2-35:8.0.2-3+deb13u15:8.0.2-3+deb13u25:8.0.2-3+deb13u35:8.0.4-1
Show 8 moreShow less
5:8.0.5-15:8.0.6-15:8.0.6-25:8.0.6-35:8.4.0-15:8.6.1-15:8.6.2-15:8.6.3-1
 None known
redis
Debian:14
 All versions, plus listed versions
5:8.0.2-35:8.0.4-15:8.0.5-15:8.0.6-15:8.0.6-2
Show 5 moreShow less
5:8.0.6-35:8.4.0-15:8.6.1-15:8.6.2-15:8.6.3-1
 None known
valkey
Debian:13
 before 8.1.1+dfsg1-3+deb13u3, plus listed versions
8.1.1+dfsg1-38.1.1+dfsg1-3+deb13u18.1.1+dfsg1-3+deb13u2
8.1.1+dfsg1-3+deb13u3
valkey
Debian:14
 before 9.1.2-1, plus listed versions
8.1.1+dfsg1-38.1.4+dfsg1-18.1.4+dfsg1-29.1.1-1
9.1.2-1
valkey
Red Hat:hummingbird:1
From an advisory covering 6 CVEs
 before 0:9.0.6-0.1.hum1
0:9.0.6-0.1.hum1
valkey-compat-redis
Red Hat:hummingbird:1
From an advisory covering 6 CVEs
 before 0:9.0.6-0.1.hum1
0:9.0.6-0.1.hum1
Show 7 moreShow less
Affected packages
PackageAffectedFixed
valkey-compat-redis-devel
Red Hat:hummingbird:1
From an advisory covering 6 CVEs
 before 0:9.0.6-0.1.hum1
0:9.0.6-0.1.hum1
valkey-devel
Red Hat:hummingbird:1
From an advisory covering 6 CVEs
 before 0:9.0.6-0.1.hum1
0:9.0.6-0.1.hum1
valkey-doc
Red Hat:hummingbird:1
From an advisory covering 6 CVEs
 before 0:9.0.6-0.1.hum1
0:9.0.6-0.1.hum1
valkey-rdma
Red Hat:hummingbird:1
From an advisory covering 6 CVEs
 before 0:9.0.6-0.1.hum1
0:9.0.6-0.1.hum1
valkey
Ubuntu:Pro:24.04:LTS
 All versions, plus listed versions
7.2.5+dfsg1-2ubuntu4~24.04.17.2.7+dfsg1-0ubuntu0.24.04.17.2.8+dfsg1-0ubuntu0.24.04.17.2.8+dfsg1-0ubuntu0.24.04.27.2.8+dfsg1-0ubuntu0.24.04.3
Show 6 moreShow less
7.2.10+dfsg1-0ubuntu0.17.2.11+dfsg1-0ubuntu0.17.2.11+dfsg1-0ubuntu0.27.2.12+dfsg1-0ubuntu0.17.2.13+dfsg1-0ubuntu0.17.2.13+dfsg1-0ubuntu0.1+esm1
 None known
valkey
Ubuntu:26.10
 All versions, plus listed versions
9.0.3-0ubuntu29.0.4-0ubuntu19.1.1-0ubuntu29.1.2-0ubuntu1
 None known
valkey
Ubuntu:26.04:LTS
 All versions, plus listed versions
8.1.3+dfsg1-0ubuntu28.1.4+dfsg1-0ubuntu19.0.2-0ubuntu19.0.3-0ubuntu19.0.3-0ubuntu29.0.4-0ubuntu0.19.0.4-0ubuntu0.2
 None known

History

History
RecordedChangedSources
affected, facts
first indexedCVE List, EUVD, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2026-82677 is a medium vulnerability (CVSS 4.8) in Valkey-io Valkey, published August 31, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.29%, the 21st percentile. Fixed in valkey 8.1.10-r0.

References

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