{"id":"CVE-2026-99132","title":"xfs: don't hold buffer locks across sync transaction commit in xfs_sync_sb_buf","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nxfs: don't hold buffer locks across sync transaction commit in xfs_sync_sb_buf\n\nxfs_sync_sb_buf() holds sb/rtsb buffer locks across a synchronous\nxfs_trans_commit(), wh…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= f7664b31975bd893190708e76b2c424328f0c49b < e5456dec79c71c8ef8f9f9adb77d320f113b34db","Linux >= f7664b31975bd893190708e76b2c424328f0c49b < 6353e5cd8c43d6e805cacbfbfecf4103571a7ff8","Linux >= f7664b31975bd893190708e76b2c424328f0c49b < 41a28c865d1d5843f8cb9e0af17a8f4d9e2961ff","Linux 4.18"],"published":"2026-10-28","updated":"2026-10-28","sourceUpdated":"2026-10-28T10:34:45.756Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-99132","references":[{"url":"https://git.kernel.org/stable/c/e5456dec79c71c8ef8f9f9adb77d320f113b34db"},{"url":"https://git.kernel.org/stable/c/6353e5cd8c43d6e805cacbfbfecf4103571a7ff8"},{"url":"https://git.kernel.org/stable/c/41a28c865d1d5843f8cb9e0af17a8f4d9e2961ff"}],"tags":["cve.org"],"ingestedAt":"2026-10-28T11:09:40.436Z","slug":"CVE-2026-99132","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nxfs: don't hold buffer locks across sync transaction commit in xfs_sync_sb_buf\n\nxfs_sync_sb_buf() holds sb/rtsb buffer locks across a synchronous\nxfs_trans_commit(), which flushes the CIL push workqueue internally.\nIf shutdown occurs during the CIL push, xfs_buf_item_unpin() needs to\nlock these buffers to fail them, causing a deadlock:\n\n  setlabel:          holds buf lock -> flush_workqueue(xfs-cil)\n  CIL push worker:   xfs_buf_item_unpin -> xfs_buf_lock(same buf)\n\nRemove the xfs_trans_bhold() calls so that commit releases the buffer\nlocks normally.  After the sync commit, re-acquire the buffers via\nmp->m_sb_bp / mp->m_rtsb_bp for the on-disk writeback.\n\n## Affected\n\n- `Linux >= f7664b31975bd893190708e76b2c424328f0c49b < e5456dec79c71c8ef8f9f9adb77d320f113b34db`\n- `Linux >= f7664b31975bd893190708e76b2c424328f0c49b < 6353e5cd8c43d6e805cacbfbfecf4103571a7ff8`\n- `Linux >= f7664b31975bd893190708e76b2c424328f0c49b < 41a28c865d1d5843f8cb9e0af17a8f4d9e2961ff`\n- `Linux 4.18`\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":[]}