PT-2026-34398 · Linux · Linux Kernel

Published 2026-04-22 · Updated 2026-04-23 · CVE-2026-31493

Positive Technologies (AI Summary)

CVSS v3.1

7.8

High

Base vector

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

Name of the Vulnerable Software and Affected Versions Linux kernel (affected versions not specified)

Description A use-after-free issue exists in the RDMA/efa component during admin queue completion handling. When an admin command completes with an error, the system attempts to print data from the completion context. However, this context may have already been freed in the polling or interrupts handler, leading to the processing of data from a context in an unknown state.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Use After Free

Weakness Enumeration

CWE-416

Related Identifiers

CVE-2026-31493

Affected Products

Linux Kernel

References · 13

• https://git.kernel.org/stable/c/ef3b06742c8a201d0e83edc9a33a89a4fe3009f8 · Patch
• https://security-tracker.debian.org/tracker/CVE-2026-31493 · Vendor Advisory
• https://git.kernel.org/stable/c/0dd98aea1c0c45987fa2dd92f988b0eb1a72c125 · Patch
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-31493 · Vendor Advisory
• https://git.kernel.org/stable/c/1cf95fe5dc5471efea947b4c6f8913da6bc7976e · Patch
• https://ubuntu.com/security/CVE-2026-31493 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2026-31493 · Security Note
• https://osv.dev/vulnerability/BELL-CVE-2026-31493 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-31493 · Security Note
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-31493 · Vendor Advisory
• https://git.kernel.org/linus/ef3b06742c8a201d0e83edc9a33a89a4fe3009f8 · Note
• https://docs.bell-sw.com/security/cves/CVE-2026-31493 · Note
• https://twitter.com/CVEnew/status/2046979985731178520 · Twitter Post