{"id":"CVE-2023-52941","state":"PUBLISHED","title":"can: isotp: split tx timer into transmission and timeout","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ncan: isotp: split tx timer into transmission and timeout\n\nThe timer for the transmission of isotp PDUs formerly had two functions:\n1. send two consecutive frames with a given time gap\n2. monitor the timeouts for flow control frames and the echo frames\n\nThis led to larger txstate checks and potentially to a problem discovered\nby syzbot which enabled the panic_on_warn feature while testing.\n\nThe former 'txtimer' function is split into 'txfrtimer' and 'txtimer'\nto handle the two above functionalities with separate timer callbacks.\n\nThe two simplified timers now run in one-shot mode and make the state\ntransitions (especially with isotp_rcv_echo) better understandable.","publishedAt":"2025-03-27T16:37:19.469Z","updatedAt":"2026-05-23T15:27:37.570Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"866337865f3747c68a3e7bb837611e39cec1ecd6","status":"affected","lessThan":"cae4c9bc35f72af5d4a079bb9d9fd62c4088a411","versionType":"git"},{"version":"866337865f3747c68a3e7bb837611e39cec1ecd6","status":"affected","lessThan":"4f027cba8216f42a18b544842efab134f8b1f9f4","versionType":"git"},{"version":"3cb476cf834edca47f4470c276feb0f519401fb7","status":"affected","versionType":"git"},{"version":"6.0.9","status":"affected","lessThan":"6.1","versionType":"semver"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/can/isotp.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.1","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.1","versionType":"semver"},{"version":"6.1.11","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.2","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/can/isotp.c"]}],"references":["https://git.kernel.org/stable/c/cae4c9bc35f72af5d4a079bb9d9fd62c4088a411","https://git.kernel.org/stable/c/4f027cba8216f42a18b544842efab134f8b1f9f4"],"weaknesses":[],"ingestedAt":"2026-10-29T20:06:33.064Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2023/52xxx/CVE-2023-52941.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2023-52941","state":"PUBLISHED","datePublished":"2025-03-27T16:37:19.469Z","dateUpdated":"2026-05-23T15:27:37.570Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2024-08-21T06:07:11.022Z"},"containers":{"cna":{"title":"can: isotp: split tx timer into transmission and timeout","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\ncan: isotp: split tx timer into transmission and timeout\n\nThe timer for the transmission of isotp PDUs formerly had two functions:\n1. send two consecutive frames with a given time gap\n2. monitor the timeouts for flow control frames and the echo frames\n\nThis led to larger txstate checks and potentially to a problem discovered\nby syzbot which enabled the panic_on_warn feature while testing.\n\nThe former 'txtimer' function is split into 'txfrtimer' and 'txtimer'\nto handle the two above functionalities with separate timer callbacks.\n\nThe two simplified timers now run in one-shot mode and make the state\ntransitions (especially with isotp_rcv_echo) better understandable."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"866337865f3747c68a3e7bb837611e39cec1ecd6","status":"affected","lessThan":"cae4c9bc35f72af5d4a079bb9d9fd62c4088a411","versionType":"git"},{"version":"866337865f3747c68a3e7bb837611e39cec1ecd6","status":"affected","lessThan":"4f027cba8216f42a18b544842efab134f8b1f9f4","versionType":"git"},{"version":"3cb476cf834edca47f4470c276feb0f519401fb7","status":"affected","versionType":"git"},{"version":"6.0.9","status":"affected","lessThan":"6.1","versionType":"semver"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/can/isotp.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.1","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.1","versionType":"semver"},{"version":"6.1.11","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.2","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/can/isotp.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/cae4c9bc35f72af5d4a079bb9d9fd62c4088a411"},{"url":"https://git.kernel.org/stable/c/4f027cba8216f42a18b544842efab134f8b1f9f4"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-05-23T15:27:37.570Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.1","versionEndExcluding":"6.1.11"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.1","versionEndExcluding":"6.2"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.0.9"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}