{"id":"CVE-2026-64146","state":"PUBLISHED","title":"erofs: fix metabuf leak in inode xattr initialization","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nerofs: fix metabuf leak in inode xattr initialization\n\ncommit bb88e8da0025 (\"erofs: use meta buffers for xattr operations\")\nconverted xattr operations to use on-stack erofs_buf instances.\nerofs_init_inode_xattrs() uses such a metabuf while reading the inline\nxattr header and shared xattr id array.\n\nSome error paths after erofs_read_metabuf() leave through out_unlock\nwithout dropping the metabuf, so the folio reference can leak.\n\nConsolidate the cleanup at out_unlock. erofs_put_metabuf() is a\nno-op if no folio has been acquired, and this keeps all paths after\ntaking EROFS_I_BL_XATTR_BIT covered by a single cleanup site.","publishedAt":"2026-07-19T15:40:37.474Z","updatedAt":"2026-10-30T12:27:38.382Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"bb88e8da00253bea0e7f0f4cdfd7910572d7799f","status":"affected","lessThan":"89682dd09efb3825b0f162a72e342c52b69ea14a","versionType":"git"},{"version":"bb88e8da00253bea0e7f0f4cdfd7910572d7799f","status":"affected","lessThan":"3812cfe6cb0a5988df4fedcdaf9aab677b9cca61","versionType":"git"},{"version":"bb88e8da00253bea0e7f0f4cdfd7910572d7799f","status":"affected","lessThan":"e4a552e0b6413c1af2e140b5bc14bb849b411b57","versionType":"git"},{"version":"bb88e8da00253bea0e7f0f4cdfd7910572d7799f","status":"affected","lessThan":"fcb23bb31508b62e8a1b32adf6217820e90e29b0","versionType":"git"},{"version":"bb88e8da00253bea0e7f0f4cdfd7910572d7799f","status":"affected","lessThan":"492c73b21fefa36f3869cb2b188ffb7fe37b3a9b","versionType":"git"},{"version":"bb88e8da00253bea0e7f0f4cdfd7910572d7799f","status":"affected","lessThan":"79b09c54c6563df9846ca3094bcfd72082c3e1d7","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/erofs/xattr.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.17","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.17","versionType":"semver"},{"version":"6.1.191","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.160","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.114","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.57","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.0.11","status":"unaffected","lessThanOrEqual":"7.0.*","versionType":"semver"},{"version":"7.1","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/erofs/xattr.c"]}],"references":["https://git.kernel.org/stable/c/89682dd09efb3825b0f162a72e342c52b69ea14a","https://git.kernel.org/stable/c/3812cfe6cb0a5988df4fedcdaf9aab677b9cca61","https://git.kernel.org/stable/c/e4a552e0b6413c1af2e140b5bc14bb849b411b57","https://git.kernel.org/stable/c/fcb23bb31508b62e8a1b32adf6217820e90e29b0","https://git.kernel.org/stable/c/492c73b21fefa36f3869cb2b188ffb7fe37b3a9b","https://git.kernel.org/stable/c/79b09c54c6563df9846ca3094bcfd72082c3e1d7"],"weaknesses":[],"ingestedAt":"2026-10-30T12:46:06.359Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/64xxx/CVE-2026-64146.json","commit":"1f312381e38164a43607eebab851b151dd16861e","baselineCommit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-64146","state":"PUBLISHED","datePublished":"2026-07-19T15:40:37.474Z","dateUpdated":"2026-10-30T12:27:38.382Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-07-19T07:54:57.037Z"},"containers":{"cna":{"title":"erofs: fix metabuf leak in inode xattr initialization","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nerofs: fix metabuf leak in inode xattr initialization\n\ncommit bb88e8da0025 (\"erofs: use meta buffers for xattr operations\")\nconverted xattr operations to use on-stack erofs_buf instances.\nerofs_init_inode_xattrs() uses such a metabuf while reading the inline\nxattr header and shared xattr id array.\n\nSome error paths after erofs_read_metabuf() leave through out_unlock\nwithout dropping the metabuf, so the folio reference can leak.\n\nConsolidate the cleanup at out_unlock. erofs_put_metabuf() is a\nno-op if no folio has been acquired, and this keeps all paths after\ntaking EROFS_I_BL_XATTR_BIT covered by a single cleanup site."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"bb88e8da00253bea0e7f0f4cdfd7910572d7799f","status":"affected","lessThan":"89682dd09efb3825b0f162a72e342c52b69ea14a","versionType":"git"},{"version":"bb88e8da00253bea0e7f0f4cdfd7910572d7799f","status":"affected","lessThan":"3812cfe6cb0a5988df4fedcdaf9aab677b9cca61","versionType":"git"},{"version":"bb88e8da00253bea0e7f0f4cdfd7910572d7799f","status":"affected","lessThan":"e4a552e0b6413c1af2e140b5bc14bb849b411b57","versionType":"git"},{"version":"bb88e8da00253bea0e7f0f4cdfd7910572d7799f","status":"affected","lessThan":"fcb23bb31508b62e8a1b32adf6217820e90e29b0","versionType":"git"},{"version":"bb88e8da00253bea0e7f0f4cdfd7910572d7799f","status":"affected","lessThan":"492c73b21fefa36f3869cb2b188ffb7fe37b3a9b","versionType":"git"},{"version":"bb88e8da00253bea0e7f0f4cdfd7910572d7799f","status":"affected","lessThan":"79b09c54c6563df9846ca3094bcfd72082c3e1d7","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/erofs/xattr.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.17","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.17","versionType":"semver"},{"version":"6.1.191","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.160","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.114","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.57","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.0.11","status":"unaffected","lessThanOrEqual":"7.0.*","versionType":"semver"},{"version":"7.1","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/erofs/xattr.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/89682dd09efb3825b0f162a72e342c52b69ea14a"},{"url":"https://git.kernel.org/stable/c/3812cfe6cb0a5988df4fedcdaf9aab677b9cca61"},{"url":"https://git.kernel.org/stable/c/e4a552e0b6413c1af2e140b5bc14bb849b411b57"},{"url":"https://git.kernel.org/stable/c/fcb23bb31508b62e8a1b32adf6217820e90e29b0"},{"url":"https://git.kernel.org/stable/c/492c73b21fefa36f3869cb2b188ffb7fe37b3a9b"},{"url":"https://git.kernel.org/stable/c/79b09c54c6563df9846ca3094bcfd72082c3e1d7"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-10-30T12:27:38.382Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.17","versionEndExcluding":"6.1.191"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.17","versionEndExcluding":"6.6.160"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.17","versionEndExcluding":"6.12.114"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.17","versionEndExcluding":"6.18.57"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.17","versionEndExcluding":"7.0.11"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.17","versionEndExcluding":"7.1"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}