{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2022-49755","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2025-03-27T16:39:17.988Z","datePublished":"2025-03-27T16:43:02.950Z","dateUpdated":"2026-05-11T19:06:09.292Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-05-11T19:06:09.292Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nusb: gadget: f_fs: Prevent race during ffs_ep0_queue_wait\n\nWhile performing fast composition switch, there is a possibility that the\nprocess of ffs_ep0_write/ffs_ep0_read get into a race condition\ndue to ep0req being freed up from functionfs_unbind.\n\nConsider the scenario that the ffs_ep0_write calls the ffs_ep0_queue_wait\nby taking a lock &ffs->ev.waitq.lock. However, the functionfs_unbind isn't\nbounded so it can go ahead and mark the ep0req to NULL, and since there\nis no NULL check in ffs_ep0_queue_wait we will end up in use-after-free.\n\nFix this by making a serialized execution between the two functions using\na mutex_lock(ffs->mutex)."}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/usb/gadget/function/f_fs.c"],"versions":[{"version":"ddf8abd2599491cbad959c700b90ba72a5dce8d0","lessThan":"facf353c9e8d7885b686d9a4b173d4e0af6441d2","status":"affected","versionType":"git"},{"version":"ddf8abd2599491cbad959c700b90ba72a5dce8d0","lessThan":"e9036e951f93fb8d7b5e9d6e2c7f94a4da312ae4","status":"affected","versionType":"git"},{"version":"ddf8abd2599491cbad959c700b90ba72a5dce8d0","lessThan":"a8d40942df074f4ebcb9bd3413596d92f323b064","status":"affected","versionType":"git"},{"version":"ddf8abd2599491cbad959c700b90ba72a5dce8d0","lessThan":"6dd9ea05534f323668db94fcc2726c7a84547e78","status":"affected","versionType":"git"},{"version":"ddf8abd2599491cbad959c700b90ba72a5dce8d0","lessThan":"ae8e136bcaae96163b5821984de1036efc9abb1a","status":"affected","versionType":"git"},{"version":"ddf8abd2599491cbad959c700b90ba72a5dce8d0","lessThan":"6aee197b7fbcd61596a78b47d553f2f99111f217","status":"affected","versionType":"git"},{"version":"ddf8abd2599491cbad959c700b90ba72a5dce8d0","lessThan":"6a19da111057f69214b97c62fb0ac59023970850","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/usb/gadget/function/f_fs.c"],"versions":[{"version":"2.6.35","status":"affected"},{"version":"0","lessThan":"2.6.35","status":"unaffected","versionType":"semver"},{"version":"4.14.305","lessThanOrEqual":"4.14.*","status":"unaffected","versionType":"semver"},{"version":"4.19.272","lessThanOrEqual":"4.19.*","status":"unaffected","versionType":"semver"},{"version":"5.4.231","lessThanOrEqual":"5.4.*","status":"unaffected","versionType":"semver"},{"version":"5.10.166","lessThanOrEqual":"5.10.*","status":"unaffected","versionType":"semver"},{"version":"5.15.91","lessThanOrEqual":"5.15.*","status":"unaffected","versionType":"semver"},{"version":"6.1.9","lessThanOrEqual":"6.1.*","status":"unaffected","versionType":"semver"},{"version":"6.2","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":"2.6.35","versionEndExcluding":"4.14.305"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.35","versionEndExcluding":"4.19.272"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.35","versionEndExcluding":"5.4.231"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.35","versionEndExcluding":"5.10.166"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.35","versionEndExcluding":"5.15.91"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.35","versionEndExcluding":"6.1.9"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.35","versionEndExcluding":"6.2"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/facf353c9e8d7885b686d9a4b173d4e0af6441d2"},{"url":"https://git.kernel.org/stable/c/e9036e951f93fb8d7b5e9d6e2c7f94a4da312ae4"},{"url":"https://git.kernel.org/stable/c/a8d40942df074f4ebcb9bd3413596d92f323b064"},{"url":"https://git.kernel.org/stable/c/6dd9ea05534f323668db94fcc2726c7a84547e78"},{"url":"https://git.kernel.org/stable/c/ae8e136bcaae96163b5821984de1036efc9abb1a"},{"url":"https://git.kernel.org/stable/c/6aee197b7fbcd61596a78b47d553f2f99111f217"},{"url":"https://git.kernel.org/stable/c/6a19da111057f69214b97c62fb0ac59023970850"}],"title":"usb: gadget: f_fs: Prevent race during ffs_ep0_queue_wait","x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"metrics":[{"cvssV3_1":{"scope":"UNCHANGED","version":"3.1","baseScore":7.8,"attackVector":"LOCAL","baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","integrityImpact":"HIGH","userInteraction":"NONE","attackComplexity":"LOW","availabilityImpact":"HIGH","privilegesRequired":"LOW","confidentialityImpact":"HIGH"}},{"other":{"type":"ssvc","content":{"id":"CVE-2022-49755","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"version":"2.0.3","timestamp":"2025-03-28T15:22:31.876200Z"}}}],"problemTypes":[{"descriptions":[{"lang":"en","type":"CWE","cweId":"CWE-416","description":"CWE-416 Use After Free"}]}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2025-03-28T15:31:59.379Z"}}]}}