CVE-2025-68336 - CVE House
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Status published Unknown CVE-2025-68336

locking/spinlock/debug: Fix data-race in do_raw_write_lock

Vulnerability Description

In the Linux kernel, the following vulnerability has been resolved: locking/spinlock/debug: Fix data-race in do_raw_write_lock KCSAN reports: BUG: KCSAN: data-race in do_raw_write_lock / do_raw_write_lock write (marked) to 0xffff800009cf504c of 4 bytes by task 1102 on cpu 1: do_raw_write_lock+0x120/0x204 _raw_write_lock_irq do_exit call_usermodehelper_exec_async ret_from_fork read to 0xffff800009cf504c of 4 bytes by task 1103 on cpu 0: do_raw_write_lock+0x88/0x204 _raw_write_lock_irq do_exit call_usermodehelper_exec_async ret_from_fork value changed: 0xffffffff -> 0x00000001 Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 1103 Comm: kworker/u4:1 6.1.111 Commit 1a365e822372 ("locking/spinlock/debug: Fix various data races") has adressed most of these races, but seems to be not consistent/not complete. >From do_raw_write_lock() only debug_write_lock_after() part has been converted to WRITE_ONCE(), but not debug_write_lock_before() part. Do it now.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

No credits recorded in the NVD database.

References

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Affected Vendor

Affected Software

Linux
Vulnerable Versions:
1a365e822372ba24c9da0822bc583894f6f3d821, 3106fb78d3579c8e9c9b3040f7f7841981919624, c0911024ff927ba5c4786b507004cb615be1d776, 09226e5c38639437565af01e6009a9286a351d04, c7673f01604fa722b9d7c1e29e17cec1b8ae09c5, c120c3dbeb76305235c8e557f84d9e2d7d0f5933, 4.4.209, 4.9.209, 4.14.164, 4.19.95, 5.4.11, 5.5, 0, 5.10.248, 5.15.198, 6.1.160, 6.6.120, 6.12.62, 6.17.12, 6.18.1, 6.19

Timeline

Official Publish: December 22nd, 2025
Last Modified: May 23rd, 2026
Added to House: July 22nd, 2026

CVSS Vectors

No vector data available

Weaknesses (CWE)

No CWE data available

MITRE ATT&CK TTPs

No associated TTPs found for this vulnerability.