{"id":"CVE-2026-64256","state":"PUBLISHED","title":"xfs: don't wrap around quota ids in dqiterate","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nxfs: don't wrap around quota ids in dqiterate\n\nLOLLM noticed that q_id is an unsigned 32-bit variable.  If it happens\nto be set to XFS_DQ_ID_MAX due to a filesystem that actually has a dquot\nfor ID_MAX, then this addition will truncate to zero and the iteration\nstarts over.  Fix this by casting to u64.","publishedAt":"2026-07-25T08:49:08.676Z","updatedAt":"2026-08-17T04:52:08.656Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"21d7500929c8a0b10e22a6755850c6f9a9280284","status":"affected","lessThan":"249e311c2ba392ceaf9ebfc145a46922946f069a","versionType":"git"},{"version":"21d7500929c8a0b10e22a6755850c6f9a9280284","status":"affected","lessThan":"d1c4c40599c376aeb0c93068a2ae344e79ee4b90","versionType":"git"},{"version":"21d7500929c8a0b10e22a6755850c6f9a9280284","status":"affected","lessThan":"2b14fe1e0924c6b901f4256456342569c5397abe","versionType":"git"},{"version":"21d7500929c8a0b10e22a6755850c6f9a9280284","status":"affected","lessThan":"d766e4e5e85d829629c3ba503802fe1303d7b591","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/xfs/scrub/dqiterate.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.8","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.8","versionType":"semver"},{"version":"6.12.96","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.39","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.1.4","status":"unaffected","lessThanOrEqual":"7.1.*","versionType":"semver"},{"version":"7.2","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/xfs/scrub/dqiterate.c"]}],"references":["https://git.kernel.org/stable/c/249e311c2ba392ceaf9ebfc145a46922946f069a","https://git.kernel.org/stable/c/d1c4c40599c376aeb0c93068a2ae344e79ee4b90","https://git.kernel.org/stable/c/2b14fe1e0924c6b901f4256456342569c5397abe","https://git.kernel.org/stable/c/d766e4e5e85d829629c3ba503802fe1303d7b591"],"weaknesses":[],"ingestedAt":"2026-10-29T20:12:41.951Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/64xxx/CVE-2026-64256.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-64256","state":"PUBLISHED","datePublished":"2026-07-25T08:49:08.676Z","dateUpdated":"2026-08-17T04:52:08.656Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-07-19T15:36:31.773Z"},"containers":{"cna":{"title":"xfs: don't wrap around quota ids in dqiterate","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nxfs: don't wrap around quota ids in dqiterate\n\nLOLLM noticed that q_id is an unsigned 32-bit variable.  If it happens\nto be set to XFS_DQ_ID_MAX due to a filesystem that actually has a dquot\nfor ID_MAX, then this addition will truncate to zero and the iteration\nstarts over.  Fix this by casting to u64."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"21d7500929c8a0b10e22a6755850c6f9a9280284","status":"affected","lessThan":"249e311c2ba392ceaf9ebfc145a46922946f069a","versionType":"git"},{"version":"21d7500929c8a0b10e22a6755850c6f9a9280284","status":"affected","lessThan":"d1c4c40599c376aeb0c93068a2ae344e79ee4b90","versionType":"git"},{"version":"21d7500929c8a0b10e22a6755850c6f9a9280284","status":"affected","lessThan":"2b14fe1e0924c6b901f4256456342569c5397abe","versionType":"git"},{"version":"21d7500929c8a0b10e22a6755850c6f9a9280284","status":"affected","lessThan":"d766e4e5e85d829629c3ba503802fe1303d7b591","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/xfs/scrub/dqiterate.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.8","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.8","versionType":"semver"},{"version":"6.12.96","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.39","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.1.4","status":"unaffected","lessThanOrEqual":"7.1.*","versionType":"semver"},{"version":"7.2","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/xfs/scrub/dqiterate.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/249e311c2ba392ceaf9ebfc145a46922946f069a"},{"url":"https://git.kernel.org/stable/c/d1c4c40599c376aeb0c93068a2ae344e79ee4b90"},{"url":"https://git.kernel.org/stable/c/2b14fe1e0924c6b901f4256456342569c5397abe"},{"url":"https://git.kernel.org/stable/c/d766e4e5e85d829629c3ba503802fe1303d7b591"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-08-17T04:52:08.656Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.8","versionEndExcluding":"6.12.96"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.8","versionEndExcluding":"6.18.39"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.8","versionEndExcluding":"7.1.4"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.8","versionEndExcluding":"7.2"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}