{"id":"CVE-2023-52638","state":"PUBLISHED","title":"can: j1939: prevent deadlock by changing j1939_socks_lock to rwlock","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ncan: j1939: prevent deadlock by changing j1939_socks_lock to rwlock\n\nThe following 3 locks would race against each other, causing the\ndeadlock situation in the Syzbot bug report:\n\n- j1939_socks_lock\n- active_session_list_lock\n- sk_session_queue_lock\n\nA reasonable fix is to change j1939_socks_lock to an rwlock, since in\nthe rare situations where a write lock is required for the linked list\nthat j1939_socks_lock is protecting, the code does not attempt to\nacquire any more locks. This would break the circular lock dependency,\nwhere, for example, the current thread already locks j1939_socks_lock\nand attempts to acquire sk_session_queue_lock, and at the same time,\nanother thread attempts to acquire j1939_socks_lock while holding\nsk_session_queue_lock.\n\nNOTE: This patch along does not fix the unregister_netdevice bug\nreported by Syzbot; instead, it solves a deadlock situation to prepare\nfor one or more further patches to actually fix the Syzbot bug, which\nappears to be a reference counting problem within the j1939 codebase.\n\n[mkl: remove unrelated newline change]","publishedAt":"2024-04-03T14:54:41.271Z","updatedAt":"2026-05-11T19:30:50.170Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"5b9272e93f2efe3f6cda60cc2c26817b2ce49386","status":"affected","lessThan":"03358aba991668d3bb2c65b3c82aa32c36851170","versionType":"git"},{"version":"5b9272e93f2efe3f6cda60cc2c26817b2ce49386","status":"affected","lessThan":"aedda066d717a0b4335d7e0a00b2e3a61e40afcf","versionType":"git"},{"version":"5b9272e93f2efe3f6cda60cc2c26817b2ce49386","status":"affected","lessThan":"26dfe112ec2e95fe0099681f6aec33da13c2dd8e","versionType":"git"},{"version":"5b9272e93f2efe3f6cda60cc2c26817b2ce49386","status":"affected","lessThan":"559b6322f9480bff68cfa98d108991e945a4f284","versionType":"git"},{"version":"5b9272e93f2efe3f6cda60cc2c26817b2ce49386","status":"affected","lessThan":"6cdedc18ba7b9dacc36466e27e3267d201948c8d","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/can/j1939/j1939-priv.h","net/can/j1939/main.c","net/can/j1939/socket.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.15","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.15","versionType":"semver"},{"version":"5.15.149","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.79","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.18","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.7.6","status":"unaffected","lessThanOrEqual":"6.7.*","versionType":"semver"},{"version":"6.8","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/can/j1939/j1939-priv.h","net/can/j1939/main.c","net/can/j1939/socket.c"]}],"references":["https://git.kernel.org/stable/c/03358aba991668d3bb2c65b3c82aa32c36851170","https://git.kernel.org/stable/c/aedda066d717a0b4335d7e0a00b2e3a61e40afcf","https://git.kernel.org/stable/c/26dfe112ec2e95fe0099681f6aec33da13c2dd8e","https://git.kernel.org/stable/c/559b6322f9480bff68cfa98d108991e945a4f284","https://git.kernel.org/stable/c/6cdedc18ba7b9dacc36466e27e3267d201948c8d"],"weaknesses":[],"ingestedAt":"2026-10-29T20:06:33.064Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2023/52xxx/CVE-2023-52638.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2023-52638","state":"PUBLISHED","datePublished":"2024-04-03T14:54:41.271Z","dateUpdated":"2026-05-11T19:30:50.170Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2024-03-06T09:52:12.093Z"},"containers":{"cna":{"title":"can: j1939: prevent deadlock by changing j1939_socks_lock to rwlock","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\ncan: j1939: prevent deadlock by changing j1939_socks_lock to rwlock\n\nThe following 3 locks would race against each other, causing the\ndeadlock situation in the Syzbot bug report:\n\n- j1939_socks_lock\n- active_session_list_lock\n- sk_session_queue_lock\n\nA reasonable fix is to change j1939_socks_lock to an rwlock, since in\nthe rare situations where a write lock is required for the linked list\nthat j1939_socks_lock is protecting, the code does not attempt to\nacquire any more locks. This would break the circular lock dependency,\nwhere, for example, the current thread already locks j1939_socks_lock\nand attempts to acquire sk_session_queue_lock, and at the same time,\nanother thread attempts to acquire j1939_socks_lock while holding\nsk_session_queue_lock.\n\nNOTE: This patch along does not fix the unregister_netdevice bug\nreported by Syzbot; instead, it solves a deadlock situation to prepare\nfor one or more further patches to actually fix the Syzbot bug, which\nappears to be a reference counting problem within the j1939 codebase.\n\n[mkl: remove unrelated newline change]"}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"5b9272e93f2efe3f6cda60cc2c26817b2ce49386","status":"affected","lessThan":"03358aba991668d3bb2c65b3c82aa32c36851170","versionType":"git"},{"version":"5b9272e93f2efe3f6cda60cc2c26817b2ce49386","status":"affected","lessThan":"aedda066d717a0b4335d7e0a00b2e3a61e40afcf","versionType":"git"},{"version":"5b9272e93f2efe3f6cda60cc2c26817b2ce49386","status":"affected","lessThan":"26dfe112ec2e95fe0099681f6aec33da13c2dd8e","versionType":"git"},{"version":"5b9272e93f2efe3f6cda60cc2c26817b2ce49386","status":"affected","lessThan":"559b6322f9480bff68cfa98d108991e945a4f284","versionType":"git"},{"version":"5b9272e93f2efe3f6cda60cc2c26817b2ce49386","status":"affected","lessThan":"6cdedc18ba7b9dacc36466e27e3267d201948c8d","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/can/j1939/j1939-priv.h","net/can/j1939/main.c","net/can/j1939/socket.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.15","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.15","versionType":"semver"},{"version":"5.15.149","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.79","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.18","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.7.6","status":"unaffected","lessThanOrEqual":"6.7.*","versionType":"semver"},{"version":"6.8","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/can/j1939/j1939-priv.h","net/can/j1939/main.c","net/can/j1939/socket.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/03358aba991668d3bb2c65b3c82aa32c36851170"},{"url":"https://git.kernel.org/stable/c/aedda066d717a0b4335d7e0a00b2e3a61e40afcf"},{"url":"https://git.kernel.org/stable/c/26dfe112ec2e95fe0099681f6aec33da13c2dd8e"},{"url":"https://git.kernel.org/stable/c/559b6322f9480bff68cfa98d108991e945a4f284"},{"url":"https://git.kernel.org/stable/c/6cdedc18ba7b9dacc36466e27e3267d201948c8d"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-05-11T19:30:50.170Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.15","versionEndExcluding":"5.15.149"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.15","versionEndExcluding":"6.1.79"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.15","versionEndExcluding":"6.6.18"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.15","versionEndExcluding":"6.7.6"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.15","versionEndExcluding":"6.8"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2024-06-17T19:30:24.987517Z","id":"CVE-2023-52638","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2024-06-18T19:57:30.521Z"}},{"title":"CVE Program Container","references":[{"url":"https://git.kernel.org/stable/c/03358aba991668d3bb2c65b3c82aa32c36851170","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/aedda066d717a0b4335d7e0a00b2e3a61e40afcf","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/26dfe112ec2e95fe0099681f6aec33da13c2dd8e","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/559b6322f9480bff68cfa98d108991e945a4f284","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/6cdedc18ba7b9dacc36466e27e3267d201948c8d","tags":["x_transferred"]}],"providerMetadata":{"shortName":"CVE","orgId":"af854a3a-2127-422b-91ae-364da2661108","dateUpdated":"2024-08-02T23:03:21.237Z"}}]}}}