PT-2026-34999 · Linux · Linux Kernel

Published 2026-04-24 · Updated 2026-04-28 · CVE-2026-31647

Positive Technologies (AI Summary)

CVSS v3.1

5.5

Medium

Base vector

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

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

Description An issue exists in the idpf driver regarding PREEMPT RT raw/bh spinlock nesting during asynchronous VC handling. The problem occurs because the async handler takes a BH spinlock while holding a completion raw spinlock, leading to an invalid wait context. This is addressed by switching from the completion raw spinlock to a local lock within the idpf vc xn struct, as the complete() and complete all() functions are called outside the lock.

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

Related Identifiers

CVE-2026-31647

Affected Products

Linux Kernel

References · 16

• https://osv.dev/vulnerability/UBUNTU-CVE-2026-31647 · Vendor Advisory
• https://git.kernel.org/stable/c/e02c974fc331f04b5ba2007d4bc6862df8a43148 · Patch
• https://ubuntu.com/security/CVE-2026-31647 · Vendor Advisory
• https://git.kernel.org/stable/c/591478118293c1bd628de330a99eb1eb2ef8d76b · Patch
• https://osv.dev/vulnerability/BELL-CVE-2026-31647 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2026-31647 · Security Note
• https://git.kernel.org/stable/c/3bb632c6b6d8154e9019beda4a43a4b518ee3e8a · Patch
• https://security-tracker.debian.org/tracker/CVE-2026-31647 · Vendor Advisory
• https://git.kernel.org/stable/c/b448529f2f2921c6fe82fd4e985cc7c05cbf02a3 · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2026-31647 · Security Note
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-31647 · Vendor Advisory
• https://docs.bell-sw.com/security/cves/CVE-2026-31647 · Note
• https://twitter.com/vuldb/status/2047912541221945356 · Twitter Post
• https://twitter.com/VulmonFeeds/status/2047769742669189136 · Twitter Post
• https://git.kernel.org/linus/591478118293c1bd628de330a99eb1eb2ef8d76b · Note