{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-23226","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2026-01-13T15:37:45.987Z","datePublished":"2026-02-18T14:53:29.562Z","dateUpdated":"2026-05-11T22:02:45.778Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-05-11T22:02:45.778Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nksmbd: add chann_lock to protect ksmbd_chann_list xarray\n\nksmbd_chann_list xarray lacks synchronization, allowing use-after-free in\nmulti-channel sessions (between lookup_chann_list() and ksmbd_chann_del).\n\nAdds rw_semaphore chann_lock to struct ksmbd_session and protects\nall xa_load/xa_store/xa_erase accesses."}],"metrics":[{"cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","baseScore":8.8,"baseSeverity":"HIGH"}}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/smb/server/mgmt/user_session.c","fs/smb/server/mgmt/user_session.h","fs/smb/server/smb2pdu.c"],"versions":[{"version":"1d9c4172110e645b383ff13eee759728d74f1a5d","lessThan":"4c2ca31608521895dd742a43beca4b4d29762345","status":"affected","versionType":"git"},{"version":"1d9c4172110e645b383ff13eee759728d74f1a5d","lessThan":"e4a8a96a93d08570e0405cfd989a8a07e5b6ff33","status":"affected","versionType":"git"},{"version":"1d9c4172110e645b383ff13eee759728d74f1a5d","lessThan":"36ef605c0395b94b826a8c8d6f2697071173de6e","status":"affected","versionType":"git"},{"version":"1d9c4172110e645b383ff13eee759728d74f1a5d","lessThan":"4f3a06cc57976cafa8c6f716646be6c79a99e485","status":"affected","versionType":"git"},{"version":"b1caecbf34b8c8260d851ec4efde71f3694460b7","status":"affected","versionType":"git"},{"version":"91bbf9cb2387a0d76322e9a343bc6bc160f66b3f","status":"affected","versionType":"git"},{"version":"853c416710b075153c1e1421e099ffbe5dac68ce","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/smb/server/mgmt/user_session.c","fs/smb/server/mgmt/user_session.h","fs/smb/server/smb2pdu.c"],"versions":[{"version":"6.3","status":"affected"},{"version":"0","lessThan":"6.3","status":"unaffected","versionType":"semver"},{"version":"6.12.77","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.18.11","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"6.19.1","lessThanOrEqual":"6.19.*","status":"unaffected","versionType":"semver"},{"version":"7.0","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":"6.3","versionEndExcluding":"6.12.77"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.3","versionEndExcluding":"6.18.11"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.3","versionEndExcluding":"6.19.1"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.3","versionEndExcluding":"7.0"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.15.145"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.1.29"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.2.16"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/4c2ca31608521895dd742a43beca4b4d29762345"},{"url":"https://git.kernel.org/stable/c/e4a8a96a93d08570e0405cfd989a8a07e5b6ff33"},{"url":"https://git.kernel.org/stable/c/36ef605c0395b94b826a8c8d6f2697071173de6e"},{"url":"https://git.kernel.org/stable/c/4f3a06cc57976cafa8c6f716646be6c79a99e485"}],"title":"ksmbd: add chann_lock to protect ksmbd_chann_list xarray","x_generator":{"engine":"bippy-1.2.0"}}}}