PT-2026-34999 · Linux · Linux Kernel

Published 2026-04-24 · Updated 2026-04-25 · CVE-2026-31647

Positive Technologies (AI Summary)

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 · 8

• https://nvd.nist.gov/vuln/detail/CVE-2026-31647 · Security Note
• https://git.kernel.org/stable/c/591478118293c1bd628de330a99eb1eb2ef8d76b · Note
• https://git.kernel.org/stable/c/3bb632c6b6d8154e9019beda4a43a4b518ee3e8a · Note
• https://git.kernel.org/stable/c/b448529f2f2921c6fe82fd4e985cc7c05cbf02a3 · Note
• https://git.kernel.org/stable/c/e02c974fc331f04b5ba2007d4bc6862df8a43148 · Note
• https://twitter.com/VulmonFeeds/status/2047769742669189136 · Twitter Post
• https://twitter.com/vuldb/status/2047912541221945356 · Twitter Post
• https://twitter.com/CVEnew/status/2047731934411772222 · Twitter Post