{"id":"CVE-2026-64146","title":"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 e…","summary":"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 e…","severity":"medium","cvss":5.5,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","cwe":["CWE-401"],"vendor":"linux","product":"linux_kernel","affected":["linux_kernel >= 5.17, < 7.0.11","linux_kernel = 7.1"],"patched":["linux_kernel 7.0.11"],"published":"2026-07-19","updated":"2026-10-15","sourceUpdated":"2026-10-15T11:17:39.427","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-64146","references":[{"url":"https://git.kernel.org/stable/c/492c73b21fefa36f3869cb2b188ffb7fe37b3a9b","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/79b09c54c6563df9846ca3094bcfd72082c3e1d7","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/fcb23bb31508b62e8a1b32adf6217820e90e29b0","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"tags":["nvd","cve.org"],"epss":0.00112,"epssPercentile":0.01295,"ingestedAt":"2026-10-15T11:00:41.697Z","slug":"CVE-2026-64146","body":"## Overview\n\nIn 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.\n\n## Affected\n\n- `linux_kernel >= 5.17, < 7.0.11`\n- `linux_kernel = 7.1`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `linux_kernel 7.0.11`","depth":"sunlit","depthScore":30,"depthScoreParts":{"impact":30.3,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":222322,"id":"CVE-2026-64146","ts":1792065882682,"field":"cvss","old":null,"new":"5.5"},{"seq":222321,"id":"CVE-2026-64146","ts":1792065882682,"field":"severity","old":"none","new":"medium"}]}