{"id":"CVE-2026-64256","summary":"xfs: don't wrap around quota ids in dqiterate","details":"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.","modified":"2026-08-18T03:31:29.145144711Z","published":"2026-07-25T08:49:08.676Z","related":["CGA-pvqh-28hf-4m7f","openSUSE-SU-2026:11476-1"],"database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64256.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/249e311c2ba392ceaf9ebfc145a46922946f069a"},{"type":"WEB","url":"https://git.kernel.org/stable/c/2b14fe1e0924c6b901f4256456342569c5397abe"},{"type":"WEB","url":"https://git.kernel.org/stable/c/d1c4c40599c376aeb0c93068a2ae344e79ee4b90"},{"type":"WEB","url":"https://git.kernel.org/stable/c/d766e4e5e85d829629c3ba503802fe1303d7b591"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64256.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-64256"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"21d7500929c8a0b10e22a6755850c6f9a9280284"},{"fixed":"249e311c2ba392ceaf9ebfc145a46922946f069a"},{"fixed":"d1c4c40599c376aeb0c93068a2ae344e79ee4b90"},{"fixed":"2b14fe1e0924c6b901f4256456342569c5397abe"},{"fixed":"d766e4e5e85d829629c3ba503802fe1303d7b591"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-64256.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"6.8.0"},{"fixed":"6.12.96"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.39"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.1.4"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-64256.json"}}],"schema_version":"1.9.0"}