PT-2026-37425 · Linux · Linux Kernel

Published 2026-05-06 · Updated 2026-05-06 · CVE-2026-43115

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 tiny SRCU (Sleep-based Read-Copy-Update) implementation where the srcu gp start if needed() function directly calls schedule work(). This sequence acquires the pool->lock, which can lead to a lockdep splat (a deadlock detection warning) when call srcu() is invoked while a scheduler lock is held. Specifically, a conflict occurs between the pi lock and the pool->lock. Additionally, a use-after-free condition could occur if a queued irq work fires after the cleanup process begins in cleanup srcu struct().

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

Related Identifiers

CVE-2026-43115

Affected Products

Linux Kernel

References · 5

• https://git.kernel.org/stable/c/bb37286db65368cb72ba8757ad86299c4e4a73fc · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2026-43115 · Security Note
• https://git.kernel.org/stable/c/a6fc88b22bc8d12ad52e8412c667ec0f5bf055af · Patch
• https://t.me/CVEtracker/52838 · Telegram Post
• https://twitter.com/vuldb/status/2051982096793817522 · Twitter Post