HOMEVULNERABILITIESCVE-2026-31693
HIGH

CVE-2026-31693

Published: April 30, 2026· Updated: May 6, 2026

7.8
CVSS v3.1
EPSS:0.01%probability of exploitation in 30 daysPercentile:1.7th

Official Description

In the Linux kernel, the following vulnerability has been resolved:

cifs: some missing initializations on replay

In several places in the code, we have a label to signify

the start of the code where a request can be replayed if

necessary. However, some of these places were missing the

necessary reinitializations of certain local variables

before replay.

This change makes sure that these variables get initialized

after the label.

NVD Source

Technical Analysis

CVE-2026-31693 requires local access, meaning attackers must already have a foothold on the target system.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 7.8.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorLocal
Attack ComplexityLow
Privileges Req.Low
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected Vendors & Products

Linux1 product
linux kernel
Source: NVD CPE · 1 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

PATCHhttps://git.kernel.org/stable/c/14f66f44646333d2bfd7ece36585874fd72f8286
PATCHhttps://git.kernel.org/stable/c/1d731e512134495e0ef490ade0e4d91dc0d515ec
PATCHhttps://git.kernel.org/stable/c/7c9ce68192eef14c777cb6ce17155d2eb2431aea
PATCHhttps://git.kernel.org/stable/c/c854ab481ece4b3e5f4c2e8b22824f015ff874a5
PATCHhttps://git.kernel.org/stable/c/c99e160938b627f6f28edee930e8abc157e84386

All References (5)

→
https://git.kernel.org/stable/c/14f66f44646333d2bfd7ece36585874fd72f8286Patch
→
https://git.kernel.org/stable/c/1d731e512134495e0ef490ade0e4d91dc0d515ecPatch
→
https://git.kernel.org/stable/c/7c9ce68192eef14c777cb6ce17155d2eb2431aeaPatch
→
https://git.kernel.org/stable/c/c854ab481ece4b3e5f4c2e8b22824f015ff874a5Patch
→
https://git.kernel.org/stable/c/c99e160938b627f6f28edee930e8abc157e84386Patch

Quick Facts

CVE IDCVE-2026-31693
CVSS Score7.8 / 10
SeverityHIGH
CISA KEVNo
EPSS (30d)0.01%
Affected1 vendor
PublishedApr 30, 2026

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2026-31693 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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