{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-89839","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2026-09-11T19:38:34.769Z","datePublished":"2026-09-16T10:31:13.727Z","dateUpdated":"2026-09-16T10:31:13.727Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-09-16T10:31:13.727Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nf2fs: use the mount idmap for the owner check in f2fs_xattr_advise_set()\n\nf2fs_xattr_advise_set() calls inode_owner_or_capable() with &nop_mnt_idmap\nbefore allowing the \"system.advise\" xattr to be set, instead of the idmap\nthat the VFS passes to the ->set() handler.\n\nf2fs supports idmapped mounts, so on such a mount this checks the caller's\nfsuid against the unmapped on-disk owner rather than the mapped owner: the\nactual owner can be wrongly denied with -EPERM and an unrelated caller\nwrongly allowed.  Pass the handler's idmap instead."}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/f2fs/xattr.c"],"versions":[{"version":"01beba7957a26f9b7179127e8ad56bb5a0f56138","lessThan":"4c0c610b480cfbc57528aa1acbd6be12ed2a6fb1","status":"affected","versionType":"git"},{"version":"01beba7957a26f9b7179127e8ad56bb5a0f56138","lessThan":"c3e2692c7a58e0bdb84bd658d827e89dcecea3ad","status":"affected","versionType":"git"},{"version":"01beba7957a26f9b7179127e8ad56bb5a0f56138","lessThan":"3b681229e9f8fb1dd29bc65983bf3c87779e4ca3","status":"affected","versionType":"git"},{"version":"01beba7957a26f9b7179127e8ad56bb5a0f56138","lessThan":"ab31e3b774f5d06b4489cef6c297b48c47c9dcbd","status":"affected","versionType":"git"},{"version":"01beba7957a26f9b7179127e8ad56bb5a0f56138","lessThan":"a54ffce4637acb0db8e695188a6c7f99f14c3576","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/f2fs/xattr.c"],"versions":[{"version":"6.3","status":"affected"},{"version":"0","lessThan":"6.3","status":"unaffected","versionType":"semver"},{"version":"6.6.157","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.12.110","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.18.51","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"7.2.5","lessThanOrEqual":"7.2.*","status":"unaffected","versionType":"semver"},{"version":"7.3-rc1","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":"6.6.157"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.3","versionEndExcluding":"6.12.110"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.3","versionEndExcluding":"6.18.51"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.3","versionEndExcluding":"7.2.5"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.3","versionEndExcluding":"7.3-rc1"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/4c0c610b480cfbc57528aa1acbd6be12ed2a6fb1"},{"url":"https://git.kernel.org/stable/c/c3e2692c7a58e0bdb84bd658d827e89dcecea3ad"},{"url":"https://git.kernel.org/stable/c/3b681229e9f8fb1dd29bc65983bf3c87779e4ca3"},{"url":"https://git.kernel.org/stable/c/ab31e3b774f5d06b4489cef6c297b48c47c9dcbd"},{"url":"https://git.kernel.org/stable/c/a54ffce4637acb0db8e695188a6c7f99f14c3576"}],"title":"f2fs: use the mount idmap for the owner check in f2fs_xattr_advise_set()","x_generator":{"engine":"bippy-1.2.0"}}}}