{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2024-42271","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2024-07-30T07:40:12.260Z","datePublished":"2024-08-17T08:54:26.048Z","dateUpdated":"2025-11-03T22:03:07.104Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2025-05-04T09:25:37.701Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet/iucv: fix use after free in iucv_sock_close()\n\niucv_sever_path() is called from process context and from bh context.\niucv->path is used as indicator whether somebody else is taking care of\nsevering the path (or it is already removed / never existed).\nThis needs to be done with atomic compare and swap, otherwise there is a\nsmall window where iucv_sock_close() will try to work with a path that has\nalready been severed and freed by iucv_callback_connrej() called by\niucv_tasklet_fn().\n\nExample:\n[452744.123844] Call Trace:\n[452744.123845] ([<0000001e87f03880>] 0x1e87f03880)\n[452744.123966]  [<00000000d593001e>] iucv_path_sever+0x96/0x138\n[452744.124330]  [<000003ff801ddbca>] iucv_sever_path+0xc2/0xd0 [af_iucv]\n[452744.124336]  [<000003ff801e01b6>] iucv_sock_close+0xa6/0x310 [af_iucv]\n[452744.124341]  [<000003ff801e08cc>] iucv_sock_release+0x3c/0xd0 [af_iucv]\n[452744.124345]  [<00000000d574794e>] __sock_release+0x5e/0xe8\n[452744.124815]  [<00000000d5747a0c>] sock_close+0x34/0x48\n[452744.124820]  [<00000000d5421642>] __fput+0xba/0x268\n[452744.124826]  [<00000000d51b382c>] task_work_run+0xbc/0xf0\n[452744.124832]  [<00000000d5145710>] do_notify_resume+0x88/0x90\n[452744.124841]  [<00000000d5978096>] system_call+0xe2/0x2c8\n[452744.125319] Last Breaking-Event-Address:\n[452744.125321]  [<00000000d5930018>] iucv_path_sever+0x90/0x138\n[452744.125324]\n[452744.125325] Kernel panic - not syncing: Fatal exception in interrupt\n\nNote that bh_lock_sock() is not serializing the tasklet context against\nprocess context, because the check for sock_owned_by_user() and\ncorresponding handling is missing.\n\nIdeas for a future clean-up patch:\nA) Correct usage of bh_lock_sock() in tasklet context, as described in\nRe-enqueue, if needed. This may require adding return values to the\ntasklet functions and thus changes to all users of iucv.\n\nB) Change iucv tasklet into worker and use only lock_sock() in af_iucv."}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/iucv/af_iucv.c"],"versions":[{"version":"7d316b9453523498246e9e19a659c423d4c5081e","lessThan":"84f40b46787ecb67c7ad08a5bb1376141fa10c01","status":"affected","versionType":"git"},{"version":"7d316b9453523498246e9e19a659c423d4c5081e","lessThan":"37652fbef9809411cea55ea5fa1a170e299efcd0","status":"affected","versionType":"git"},{"version":"7d316b9453523498246e9e19a659c423d4c5081e","lessThan":"c65f72eec60a34ace031426e04e9aff8e5f04895","status":"affected","versionType":"git"},{"version":"7d316b9453523498246e9e19a659c423d4c5081e","lessThan":"ac758e1f663fe9bc64f6b47212a2aa18697524f5","status":"affected","versionType":"git"},{"version":"7d316b9453523498246e9e19a659c423d4c5081e","lessThan":"8b424c9e44111c5a76f41c6b741f8d4c4179d876","status":"affected","versionType":"git"},{"version":"7d316b9453523498246e9e19a659c423d4c5081e","lessThan":"01437282fd3904810603f3dc98d2cac6b8b6fc84","status":"affected","versionType":"git"},{"version":"7d316b9453523498246e9e19a659c423d4c5081e","lessThan":"69620522c48ce8215e5eb55ffbab8cafee8f407d","status":"affected","versionType":"git"},{"version":"7d316b9453523498246e9e19a659c423d4c5081e","lessThan":"f558120cd709682b739207b48cf7479fd9568431","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/iucv/af_iucv.c"],"versions":[{"version":"3.4","status":"affected"},{"version":"0","lessThan":"3.4","status":"unaffected","versionType":"semver"},{"version":"4.19.320","lessThanOrEqual":"4.19.*","status":"unaffected","versionType":"semver"},{"version":"5.4.282","lessThanOrEqual":"5.4.*","status":"unaffected","versionType":"semver"},{"version":"5.10.224","lessThanOrEqual":"5.10.*","status":"unaffected","versionType":"semver"},{"version":"5.15.165","lessThanOrEqual":"5.15.*","status":"unaffected","versionType":"semver"},{"version":"6.1.104","lessThanOrEqual":"6.1.*","status":"unaffected","versionType":"semver"},{"version":"6.6.45","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.10.4","lessThanOrEqual":"6.10.*","status":"unaffected","versionType":"semver"},{"version":"6.11","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.4","versionEndExcluding":"4.19.320"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.4","versionEndExcluding":"5.4.282"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.4","versionEndExcluding":"5.10.224"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.4","versionEndExcluding":"5.15.165"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.4","versionEndExcluding":"6.1.104"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.4","versionEndExcluding":"6.6.45"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.4","versionEndExcluding":"6.10.4"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.4","versionEndExcluding":"6.11"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/84f40b46787ecb67c7ad08a5bb1376141fa10c01"},{"url":"https://git.kernel.org/stable/c/37652fbef9809411cea55ea5fa1a170e299efcd0"},{"url":"https://git.kernel.org/stable/c/c65f72eec60a34ace031426e04e9aff8e5f04895"},{"url":"https://git.kernel.org/stable/c/ac758e1f663fe9bc64f6b47212a2aa18697524f5"},{"url":"https://git.kernel.org/stable/c/8b424c9e44111c5a76f41c6b741f8d4c4179d876"},{"url":"https://git.kernel.org/stable/c/01437282fd3904810603f3dc98d2cac6b8b6fc84"},{"url":"https://git.kernel.org/stable/c/69620522c48ce8215e5eb55ffbab8cafee8f407d"},{"url":"https://git.kernel.org/stable/c/f558120cd709682b739207b48cf7479fd9568431"}],"title":"net/iucv: fix use after free in iucv_sock_close()","x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"id":"CVE-2024-42271","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"version":"2.0.3","timestamp":"2024-09-10T16:12:11.442193Z"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2024-09-12T17:33:32.331Z"}},{"title":"CVE Program Container","references":[{"url":"https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html"}],"providerMetadata":{"orgId":"af854a3a-2127-422b-91ae-364da2661108","shortName":"CVE","dateUpdated":"2025-11-03T22:03:07.104Z"}}]}}