CVE-2025-68336: locking/spinlock/debug: Fix data-race in do_raw_write_lock
Vulnerability summary
CVE-2025-68336 is a high (CVSS 7.5) vulnerability in linux. EPSS estimates a 0.47% chance of exploitation in the next 30 days, higher than 40.3% of scored vulnerabilities.
Severe, CVSS 7.5 (CVE.org); no exploitation reported by the 5 checked sources; EPSS 0% (FIRST, 03-11-2026)
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 34 · Related 32Timeline
- 22-12-2025PublishedVulnerability first disclosed.
- 16-10-2026Last modifiedVulnerability information updated.
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.
CVSS metrics
5 scores · 4 sources · 2 versions- OSV · UbuntuEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- OSV · DebianEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- NVDNIST7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS trend
Probability
0.47%
Chance of exploitation in the next 30 days
Percentile
40%
Versus all other CVEs
30-day change
No change 0.00 pp
From 0.47% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeNo weakness data has been published for this record.
Affected systems
Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.
Ubuntu156 products
- linuxAll versions (No fix recorded) | < 5.15.0-173.183 | < 6.8.0-110.110 | < 6.17.0-19.19
- linux-allwinner-5.19All versions (No fix recorded)
- linux-awsAll versions (No fix recorded) | < 5.15.0-1103.110 | < 6.8.0-1052.55 | < 6.17.0-1009.9
- linux-aws-5.0All versions (No fix recorded)
- linux-aws-5.11All versions (No fix recorded)
Debian1 product
- linux< 6.1.162-1 | < 6.12.63-1 | < 6.17.12-1
Linux1 product
- linux≥ 1a365e822372ba24c9da0822bc583894f6f3d821, < 8e5b2cf10844402054b52b489b525dc30cc16908 | ≥ 1a365e822372ba24c9da0822bc583894f6f3d821, < c228cb699a07a5f2d596d186bc5c314c99bb8bbf | ≥ 1a365e822372ba24c9da0822bc583894f6f3d821, < 93bd23524d63deb80fb85beb2e43fafeb1043d0f | ≥ 1a365e822372ba24c9da0822bc583894f6f3d821, < 39d2ef113416f1a4205b03fb0aa2e428d1412c77 | ≥ 1a365e822372ba24c9da0822bc583894f6f3d821, < b163a5e8c703201c905d6ec7920ed79d167e8442 | ≥ 1a365e822372ba24c9da0822bc583894f6f3d821, < 16b3590c0e1e615757dade098c8fbc0d4f040c76 | ≥ 1a365e822372ba24c9da0822bc583894f6f3d821, < 396a9270a7b90886be501611b13aa636f2e8c703 | ≥ 1a365e822372ba24c9da0822bc583894f6f3d821, < c14ecb555c3ee80eeb030a4e46d00e679537f03a | 3106fb78d3579c8e9c9b3040f7f7841981919624 | c0911024ff927ba5c4786b507004cb615be1d776 | 09226e5c38639437565af01e6009a9286a351d04 | c7673f01604fa722b9d7c1e29e17cec1b8ae09c5 | c120c3dbeb76305235c8e557f84d9e2d7d0f5933 | ≥ 4.4.209, < 4.5 | ≥ 4.9.209, < 4.10 | ≥ 4.14.164, < 4.15 | ≥ 4.19.95, < 4.20 | ≥ 5.4.11, < 5.5 | 5.5
3 vendors · 158 products
