HOMEVULNERABILITIESCVE-2026-31491
MEDIUM

CVE-2026-31491

Published: April 22, 2026· Updated: Apr 28, 2026

5.5
CVSS v3.1
EPSS:0.02%probability of exploitation in 30 daysPercentile:4.1th

Official Description

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

RDMA/irdma: Harden depth calculation functions

An issue was exposed where OS can pass in U32_MAX for SQ/RQ/SRQ size.

This can cause integer overflow and truncation of SQ/RQ/SRQ depth

returning a success when it should have failed.

Harden the functions to do all depth calculations and boundary

checking in u64 sizes.

NVD Source

Technical Analysis

CVE-2026-31491 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 availability disruption (denial of service), with a CVSS base score of 5.5.

CVSS v3.1 Vector Breakdown

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

Affected Vendors & Products

Linux1 product
linux kernel
Source: NVD CPE · 3 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/3f08351de5ca4f2f724b86ad252fbc21289467e1
PATCHhttps://git.kernel.org/stable/c/cbd852f5700eb3f64392452faf693ac45cae8281
PATCHhttps://git.kernel.org/stable/c/e37afcb56ae070477741fe2d6e61fc0c542cce2d

All References (3)

→
https://git.kernel.org/stable/c/3f08351de5ca4f2f724b86ad252fbc21289467e1Patch
→
https://git.kernel.org/stable/c/cbd852f5700eb3f64392452faf693ac45cae8281Patch
→
https://git.kernel.org/stable/c/e37afcb56ae070477741fe2d6e61fc0c542cce2dPatch

Quick Facts

CVE IDCVE-2026-31491
CVSS Score5.5 / 10
SeverityMEDIUM
CISA KEVNo
EPSS (30d)0.02%
Affected1 vendor
PublishedApr 22, 2026

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2026-31491 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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