{"id":"CVE-2026-64256","title":"xfs: don't wrap around quota ids in dqiterate","summary":"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 tha…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= 21d7500929c8a0b10e22a6755850c6f9a9280284 < 249e311c2ba392ceaf9ebfc145a46922946f069a","Linux >= 21d7500929c8a0b10e22a6755850c6f9a9280284 < d1c4c40599c376aeb0c93068a2ae344e79ee4b90","Linux >= 21d7500929c8a0b10e22a6755850c6f9a9280284 < 2b14fe1e0924c6b901f4256456342569c5397abe","Linux >= 21d7500929c8a0b10e22a6755850c6f9a9280284 < d766e4e5e85d829629c3ba503802fe1303d7b591","Linux 6.8"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-11-06T16:33:13.341232Z"},"published":"2026-07-25","updated":"2026-11-06","sourceUpdated":"2026-11-06T16:34:31.667Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-64256","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"}],"tags":["cve.org"],"epss":0.00159,"epssPercentile":0.05108,"ingestedAt":"2026-11-06T16:57:43.214Z","slug":"CVE-2026-64256","body":"## Overview\n\nIn 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.\n\n## Affected\n\n- `Linux >= 21d7500929c8a0b10e22a6755850c6f9a9280284 < 249e311c2ba392ceaf9ebfc145a46922946f069a`\n- `Linux >= 21d7500929c8a0b10e22a6755850c6f9a9280284 < d1c4c40599c376aeb0c93068a2ae344e79ee4b90`\n- `Linux >= 21d7500929c8a0b10e22a6755850c6f9a9280284 < 2b14fe1e0924c6b901f4256456342569c5397abe`\n- `Linux >= 21d7500929c8a0b10e22a6755850c6f9a9280284 < d766e4e5e85d829629c3ba503802fe1303d7b591`\n- `Linux 6.8`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}