{"id":"CVE-2026-98388","state":"PUBLISHED","title":"exec: do_close_on_exec() before taking exec_update_lock","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nexec: do_close_on_exec() before taking exec_update_lock\n\ndo_close_on_exec() currently happens while holding the exec_update_lock,\nwhich is used in a lot of places that access process state to\nsynchronize access checks.\nI recently added another such use of exec_update_lock, causing a\nregression.\n\ndo_close_on_exec() can block waiting for a reply from a filesystem.\nThat means a hung filesystem can block codepaths that use\nexec_update_lock; and it also means that a FUSE filesystem which\nattempts to inspect the calling process can deadlock.\n\nTo avoid such problems, move do_close_on_exec() before the\nexec_update_lock is taken, but after the FD table has been copied if\nnecessary.\n\nI have looked through all the calls between the old and new position of\nthe do_close_on_exec() call; there seems to be no file descriptor table\naccess in between.","publishedAt":"2026-10-14T13:25:52.117Z","updatedAt":"2026-10-19T09:18:39.224Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"ae1e630bcaac739f625822078edbaea98366930d","status":"affected","lessThan":"955973fff4a36d39a848b00cac1706863f568fe1","versionType":"git"},{"version":"d54f14655fd7d7b293698a8b6918563c4c0465e7","status":"affected","lessThan":"550feab5b01000ab314868b62211fb3ddfd600e8","versionType":"git"},{"version":"bb43679356f1f2a4c6b1c88aec4f021e5b5c74e9","status":"affected","lessThan":"5aacc19ba2b1faf84c4a2f2cf9a1784e03d1ff38","versionType":"git"},{"version":"7456ae990a9738962b33146916fabca62ae3d4e0","status":"affected","lessThan":"3feb4020bfb7ccf0d347f27051639d25e19cd65d","versionType":"git"},{"version":"4bfe8c481846cee52473a2f7d7b30ee8e6749fc4","status":"affected","lessThan":"0d86cd6b709c39216e6ee5ea8f0fc4242bbb2b53","versionType":"git"},{"version":"f9b4b03ccc9c69bf7f7298d4559906ebea7143b3","status":"affected","lessThan":"19ddef61ee0a49782a60f8f497e50597ad5de2da","versionType":"git"},{"version":"6650527444dadc63d84aa939d14ecba4fadb2f69","status":"affected","lessThan":"63be3d8511bdafa095cd14a393cbf3c58dbbb928","versionType":"git"},{"version":"6650527444dadc63d84aa939d14ecba4fadb2f69","status":"affected","lessThan":"e780259b54e618ceb4763fbc21314acf3565e813","versionType":"git"},{"version":"c1cfd63326f5d09999134e9052c353faf738286e","status":"affected","versionType":"git"},{"version":"5.10.261","status":"affected","lessThan":"5.10.271","versionType":"semver"},{"version":"5.15.212","status":"affected","lessThan":"5.15.222","versionType":"semver"},{"version":"6.1.178","status":"affected","lessThan":"6.1.189","versionType":"semver"},{"version":"6.6.145","status":"affected","lessThan":"6.6.158","versionType":"semver"},{"version":"6.12.97","status":"affected","lessThan":"6.12.111","versionType":"semver"},{"version":"6.18.40","status":"affected","lessThan":"6.18.53","versionType":"semver"},{"version":"7.1.4","status":"affected","lessThan":"7.2","versionType":"semver"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/exec.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"7.2","status":"affected"},{"version":"0","status":"unaffected","lessThan":"7.2","versionType":"semver"},{"version":"5.10.271","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.222","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.189","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.158","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.111","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.53","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.7","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/exec.c"]}],"references":["https://git.kernel.org/stable/c/955973fff4a36d39a848b00cac1706863f568fe1","https://git.kernel.org/stable/c/550feab5b01000ab314868b62211fb3ddfd600e8","https://git.kernel.org/stable/c/5aacc19ba2b1faf84c4a2f2cf9a1784e03d1ff38","https://git.kernel.org/stable/c/3feb4020bfb7ccf0d347f27051639d25e19cd65d","https://git.kernel.org/stable/c/0d86cd6b709c39216e6ee5ea8f0fc4242bbb2b53","https://git.kernel.org/stable/c/19ddef61ee0a49782a60f8f497e50597ad5de2da","https://git.kernel.org/stable/c/63be3d8511bdafa095cd14a393cbf3c58dbbb928","https://git.kernel.org/stable/c/e780259b54e618ceb4763fbc21314acf3565e813"],"weaknesses":[],"ingestedAt":"2026-10-29T20:13:43.249Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/98xxx/CVE-2026-98388.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-98388","state":"PUBLISHED","datePublished":"2026-10-14T13:25:52.117Z","dateUpdated":"2026-10-19T09:18:39.224Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-09-25T10:25:14.346Z"},"containers":{"cna":{"title":"exec: do_close_on_exec() before taking exec_update_lock","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nexec: do_close_on_exec() before taking exec_update_lock\n\ndo_close_on_exec() currently happens while holding the exec_update_lock,\nwhich is used in a lot of places that access process state to\nsynchronize access checks.\nI recently added another such use of exec_update_lock, causing a\nregression.\n\ndo_close_on_exec() can block waiting for a reply from a filesystem.\nThat means a hung filesystem can block codepaths that use\nexec_update_lock; and it also means that a FUSE filesystem which\nattempts to inspect the calling process can deadlock.\n\nTo avoid such problems, move do_close_on_exec() before the\nexec_update_lock is taken, but after the FD table has been copied if\nnecessary.\n\nI have looked through all the calls between the old and new position of\nthe do_close_on_exec() call; there seems to be no file descriptor table\naccess in between."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"ae1e630bcaac739f625822078edbaea98366930d","status":"affected","lessThan":"955973fff4a36d39a848b00cac1706863f568fe1","versionType":"git"},{"version":"d54f14655fd7d7b293698a8b6918563c4c0465e7","status":"affected","lessThan":"550feab5b01000ab314868b62211fb3ddfd600e8","versionType":"git"},{"version":"bb43679356f1f2a4c6b1c88aec4f021e5b5c74e9","status":"affected","lessThan":"5aacc19ba2b1faf84c4a2f2cf9a1784e03d1ff38","versionType":"git"},{"version":"7456ae990a9738962b33146916fabca62ae3d4e0","status":"affected","lessThan":"3feb4020bfb7ccf0d347f27051639d25e19cd65d","versionType":"git"},{"version":"4bfe8c481846cee52473a2f7d7b30ee8e6749fc4","status":"affected","lessThan":"0d86cd6b709c39216e6ee5ea8f0fc4242bbb2b53","versionType":"git"},{"version":"f9b4b03ccc9c69bf7f7298d4559906ebea7143b3","status":"affected","lessThan":"19ddef61ee0a49782a60f8f497e50597ad5de2da","versionType":"git"},{"version":"6650527444dadc63d84aa939d14ecba4fadb2f69","status":"affected","lessThan":"63be3d8511bdafa095cd14a393cbf3c58dbbb928","versionType":"git"},{"version":"6650527444dadc63d84aa939d14ecba4fadb2f69","status":"affected","lessThan":"e780259b54e618ceb4763fbc21314acf3565e813","versionType":"git"},{"version":"c1cfd63326f5d09999134e9052c353faf738286e","status":"affected","versionType":"git"},{"version":"5.10.261","status":"affected","lessThan":"5.10.271","versionType":"semver"},{"version":"5.15.212","status":"affected","lessThan":"5.15.222","versionType":"semver"},{"version":"6.1.178","status":"affected","lessThan":"6.1.189","versionType":"semver"},{"version":"6.6.145","status":"affected","lessThan":"6.6.158","versionType":"semver"},{"version":"6.12.97","status":"affected","lessThan":"6.12.111","versionType":"semver"},{"version":"6.18.40","status":"affected","lessThan":"6.18.53","versionType":"semver"},{"version":"7.1.4","status":"affected","lessThan":"7.2","versionType":"semver"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/exec.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"7.2","status":"affected"},{"version":"0","status":"unaffected","lessThan":"7.2","versionType":"semver"},{"version":"5.10.271","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.222","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.189","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.158","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.111","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.53","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.7","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/exec.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/955973fff4a36d39a848b00cac1706863f568fe1"},{"url":"https://git.kernel.org/stable/c/550feab5b01000ab314868b62211fb3ddfd600e8"},{"url":"https://git.kernel.org/stable/c/5aacc19ba2b1faf84c4a2f2cf9a1784e03d1ff38"},{"url":"https://git.kernel.org/stable/c/3feb4020bfb7ccf0d347f27051639d25e19cd65d"},{"url":"https://git.kernel.org/stable/c/0d86cd6b709c39216e6ee5ea8f0fc4242bbb2b53"},{"url":"https://git.kernel.org/stable/c/19ddef61ee0a49782a60f8f497e50597ad5de2da"},{"url":"https://git.kernel.org/stable/c/63be3d8511bdafa095cd14a393cbf3c58dbbb928"},{"url":"https://git.kernel.org/stable/c/e780259b54e618ceb4763fbc21314acf3565e813"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-10-19T09:18:39.224Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.10.261","versionEndExcluding":"5.10.271"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.15.212","versionEndExcluding":"5.15.222"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.1.178","versionEndExcluding":"6.1.189"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.6.145","versionEndExcluding":"6.6.158"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.12.97","versionEndExcluding":"6.12.111"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.18.40","versionEndExcluding":"6.18.53"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding"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