HOMEVULNERABILITIESCVE-2026-31493
HIGH

CVE-2026-31493

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

7.8
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/efa: Fix use of completion ctx after free

On admin queue completion handling, if the admin command completed with

error we print data from the completion context. The issue is that we

already freed the completion context in polling/interrupts handler which

means we print data from context in an unknown state (it might be

already used again).

Change the admin submission flow so alloc/dealloc of the context will be

symmetric and dealloc will be called after any potential use of the

context.

NVD Source

Technical Analysis

CVE-2026-31493 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 · 3 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
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Official Patches & Advisories

All References (3)

Quick Facts

CVE IDCVE-2026-31493
CVSS Score7.8 / 10
SeverityHIGH
CISA KEVNo
EPSS (30d)0.02%
Affected1 vendor
PublishedApr 22, 2026

Recommended Actions

  • Apply vendor patches immediately
  • Monitor CVE-2026-31493 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.