PT-2025-37208 · Linux+5 · Linux Kernel+5
Published
2025-04-24
·
Updated
2026-05-26
·
CVE-2025-39749
CVSS v3.1
7.0
High
| Vector | AV:L/AC:H/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 data race condition exists within the Linux kernel's RCU (Read-Copy-Update) implementation. Specifically, the
->defer qs iw pending field of the per-CPU rcu data structure is susceptible to concurrent access by the irq-work handler and rcu read unlock special(). This occurs on kernels configured with CONFIG IRQ WORK=y, where rcu read unlock special() is invoked within an interrupts-disabled region, potentially leading to a KCSAN splat. The issue arises because irq-work handlers run with interrupts enabled, allowing interruption of rcu preempt deferred qs handler() during updates to the ->defer qs iw pending field, creating a data race.Recommendations:
At the moment, there is no information about a newer version that contains a fix for this vulnerability.
Exploit
Race Condition
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Weakness Enumeration
Related Identifiers
Affected Products
Debian
Linuxmint
Linux Kernel
Red Os
Suse
Ubuntu