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CVE-2025-68336

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

Published
Last modified
published
Not listed in CISA KEV
Fix
Fixed in 4.5, 4.10, 4.15, 4.20, 5.5, and 7 more
None on Exploit-DB, Metasploit or GitHub
  • Exploitation: none
  • Automatable: yes
  • Technical impact: partial

Summary

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.

Timeline

  1. CVE published
  2. CISA SSVC assessment

    Exploitation: none · Automatable: yes · Technical impact: partial

  3. Record last updated

Affected versions

  • Linux Linux

    From 1a365e822372ba24c9da0822bc583894f6f3d821 · fixed in 8e5b2cf10844402054b52b489b525dc30cc16908; From 1a365e822372ba24c9da0822bc583894f6f3d821 · fixed in c228cb699a07a5f2d596d186bc5c314c99bb8bbf; From 1a365e822372ba24c9da0822bc583894f6f3d821 · fixed in 93bd23524d63deb80fb85beb2e43fafeb1043d0f; From 1a365e822372ba24c9da0822bc583894f6f3d821 · fixed in 39d2ef113416f1a4205b03fb0aa2e428d1412c77; From 1a365e822372ba24c9da0822bc583894f6f3d821 · fixed in b163a5e8c703201c905d6ec7920ed79d167e8442; From 1a365e822372ba24c9da0822bc583894f6f3d821 · fixed in 16b3590c0e1e615757dade098c8fbc0d4f040c76; From 1a365e822372ba24c9da0822bc583894f6f3d821 · fixed in 396a9270a7b90886be501611b13aa636f2e8c703; From 1a365e822372ba24c9da0822bc583894f6f3d821 · fixed in c14ecb555c3ee80eeb030a4e46d00e679537f03a; From 4.4.209 · fixed in 4.5; From 4.9.209 · fixed in 4.10; From 4.14.164 · fixed in 4.15; From 4.19.95 · fixed in 4.20; From 5.4.11 · fixed in 5.5

  • Linux Linux

    5.5

  • KernelLinux

    From 5.5.0 · fixed in 5.10.248; From 5.11.0 · fixed in 5.15.198; From 5.16.0 · fixed in 6.1.160; From 6.2.0 · fixed in 6.6.120; From 6.7.0 · fixed in 6.12.62; From 6.13.0 · fixed in 6.17.12; From 6.18.0 · fixed in 6.18.1

References 8

git.kernel.org