{"schema_version":"1.9.0","id":"CVE-2024-26685","published":"2024-04-03T14:54:47.688Z","modified":"2026-08-12T03:51:22.691455912Z","related":["SUSE-SU-2024:1490-1","SUSE-SU-2024:1659-1","SUSE-SU-2024:1663-1","SUSE-SU-2024:2135-1","SUSE-SU-2024:2203-1","SUSE-SU-2024:2973-1","SUSE-SU-2025:20008-1"],"summary":"nilfs2: fix potential bug in end_buffer_async_write","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nnilfs2: fix potential bug in end_buffer_async_write\n\nAccording to a syzbot report, end_buffer_async_write(), which handles the\ncompletion of block device writes, may detect abnormal condition of the\nbuffer async_write flag and cause a BUG_ON failure when using nilfs2.\n\nNilfs2 itself does not use end_buffer_async_write().  But, the async_write\nflag is now used as a marker by commit 7f42ec394156 (\"nilfs2: fix issue\nwith race condition of competition between segments for dirty blocks\") as\na means of resolving double list insertion of dirty blocks in\nnilfs_lookup_dirty_data_buffers() and nilfs_lookup_node_buffers() and the\nresulting crash.\n\nThis modification is safe as long as it is used for file data and b-tree\nnode blocks where the page caches are independent.  However, it was\nirrelevant and redundant to also introduce async_write for segment summary\nand super root blocks that share buffers with the backing device.  This\nled to the possibility that the BUG_ON check in end_buffer_async_write\nwould fail as described above, if independent writebacks of the backing\ndevice occurred in parallel.\n\nThe use of async_write for segment summary buffers has already been\nremoved in a previous change.\n\nFix this issue by removing the manipulation of the async_write flag for\nthe remaining super root block buffer.","affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"7f42ec3941560f0902fe3671e36f2c20ffd3af0a"},{"fixed":"c4a09fdac625e64abe478dcf88bfa20406616928"},{"fixed":"d31c8721e816eff5ca6573cc487754f357c093cd"},{"fixed":"f3e4963566f58726d3265a727116a42b591f6596"},{"fixed":"8fa90634ec3e9cc50f42dd605eec60f2d146ced8"},{"fixed":"6589f0f72f8edd1fa11adce4eedbd3615f2e78ab"},{"fixed":"2c3bdba00283a6c7a5b19481a59a730f46063803"},{"fixed":"626daab3811b772086aef1bf8eed3ffe6f523eff"},{"fixed":"5bc09b397cbf1221f8a8aacb1152650c9195b02b"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"0"},{"last_affected":"ccebcc74c81d8399c7b204aea47c1f33b09c2b17"},{"last_affected":"831c87640d23ccb253a02e4901bd9a325b5e8c2d"},{"last_affected":"d8974c7fe717ee8fb0706e35cc92e0bcdf660ec5"},{"last_affected":"8f67918af09fc0ffd426a9b6f87697976d3fbc7b"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"3.2.52"},{"fixed":"3.3"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"3.4.83"},{"fixed":"3.5"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"3.10.16"},{"fixed":"3.11"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"3.11.5"},{"fixed":"3.12"}]}],"versions":["v3.4.82","v3.4.81","v3.4.80","v3.4.79","v3.4.78","v3.4.77","v3.4.76","v3.4.75","v3.4.74","v3.4.73","v3.4.72","v3.4.71","v3.4.70","v3.4.69","v3.4.68","v3.11","v3.4.67","v3.2.51","v3.4.66","v3.11.4","v3.10.15","v3.4.65","v3.11.3","v3.10.14","v3.4.64","v3.11.2","v3.10.13","v3.4.63","v3.11.1","v3.10.12","v3.4.62","v3.10.11","v3.4.61","v3.2.50","v3.11-rc7","v3.10.10","v3.4.60","v3.11-rc2","v3.11-rc5","v3.11-rc1","v3.11-rc3","v3.11-rc4","v3.4.59","v3.10.9","v3.11-rc6","v3.10.8","v3.10.7","v3.4.58","v3.10.6","v3.4.57","v3.10.5","v3.4.56","v3.10-rc2","v3.10.4","v3.4.55","v3.2.49","v3.10.3","v3.4.54","v3.2.48","v3.10.2","v3.10","v3.10.1","v3.4.53","v3.4.52","v3.4.51","v3.10-rc7","v3.2.47","v3.10-rc6","v3.10-rc1","v3.4.50","v3.10-rc5","v3.10-rc3","v3.4.49","v3.2.46","v3.10-rc4","v3.4.48","v3.4.47","v3.2.45","v3.9","v3.4.46","v3.4.45","v3.2.44","v3.4.44","v3.4.43","v3.9-rc2","v3.9-rc7","v3.4.42","v3.9-rc8","v3.4.41","v3.2.43","v3.9-rc3","v3.9-rc6","v3.9-rc5","v3.4.40","v3.4.39","v3.9-rc4","v3.9-rc1","v3.2.42","v3.8","v3.4.38","v3.4.37","v3.2.41","v3.4.36","v3.2.40","v3.4.35","v3.2.39","v3.4.34","v3.4.33","v3.8-rc7","v3.4.32","v3.8-rc6","v3.2.38","v3.8-rc5","v3.4.31","v3.4.30","v3.8-rc2","v3.4.29","v3.2.37","v3.4.28","v3.8-rc1","v3.8-rc3","v3.8-rc4","v3.4.27","v3.4.26","v3.4.25","v3.2.36","v3.7","v3.4.24","v3.2.35","v3.4.23","v3.7-rc1","v3.6","v3.7-rc6","v3.7-rc7","v3.4.22","v3.7-rc3","v3.7-rc8","v3.2.34","v3.4.21","v3.4.20","v3.7-rc2","v3.4.19","v3.7-rc4","v3.7-rc5","v3.4.18","v3.2.33","v3.4.17","v3.4.16","v3.2.32","v3.4.15","v3.4.14","v3.2.31","v3.4.13","v3.2.30","v3.6-rc7","v3.4.12","v3.6-rc1","v3.5-rc3","v3.4.11","v3.6-rc6","v3.6-rc5","v3.5","v3.6-rc3","v3.6-rc4","v3.2.29","v3.6-rc2","v3.4.10","v3.2.28","v3.4-rc4","v3.4.9","v3.2.27","v3.4.8","v3.2.26","v3.4.7","v3.2.25","v3.2.24","v3.4.6","v3.5-rc7","v3.2.23","v3.5-rc5","v3.5-rc6","v3.4.5","v3.4.4","v3.5-rc2","v3.2.22","v3.5-rc1","v3.5-rc4","v3.2.21","v3.4","v3.4.3","v3.2.20","v3.4.2","v3.2.19","v3.4.1","v3.2.18","v3.4-rc2","v3.4-rc1","v3.2.17","v3.4-rc7","v3.4-rc6","v3.4-rc3","v3.4-rc5","v3.2.16","v3.2.15","v3.3","v3.2.14","v3.2.13","v3.3-rc6","v3.3-rc3","v3.2.12","v3.3-rc7","v3.2.11","v3.3-rc2","v3.3-rc5","v3.2","v3.2.10","v3.3-rc4","v3.2.9","v3.3-rc1","v3.2.8","v3.2.7","v3.2.6","v3.2.5","v3.2.4","v3.2.3","v3.2.2","v3.2.1","v3.2-rc4","v3.2-rc7","v3.2-rc6","v3.2-rc5","v3.2-rc3","v3.1","v3.2-rc2","v3.2-rc1","v3.1-rc1","v3.1-rc9","v3.1-rc8","v3.1-rc10","v3.1-rc7","v3.1-rc3","v3.1-rc2","v3.1-rc4","v3.1-rc5","v3.0","v3.1-rc6","v3.0-rc7","v3.0-rc4","v3.0-rc6","v3.0-rc5","v3.0-rc3","v3.0-rc1","v2.6.39","v3.0-rc2","v2.6.38","v2.6.39-rc2","v2.6.39-rc7","v2.6.39-rc5","v2.6.39-rc1","v2.6.38-rc7","v2.6.39-rc6","v2.6.39-rc4","v2.6.39-rc3","v2.6.37","v2.6.38-rc1","v2.6.38-rc8","v2.6.38-rc2","v2.6.38-rc6","v2.6.38-rc5","v2.6.38-rc4","v2.6.38-rc3","v2.6.37-rc4","v2.6.37-rc2","v2.6.36","v2.6.37-rc5","v2.6.37-rc8","v2.6.37-rc7","v2.6.37-rc6","v2.6.37-rc1","v2.6.37-rc3","v2.6.36-rc6","v2.6.35-rc4","v2.6.36-rc8","v2.6.35","v2.6.36-rc7","v2.6.36-rc3","v2.6.36-rc5","v2.6.36-rc4","v2.6.36-rc2","v2.6.36-rc1","v2.6.35-rc5","v2.6.35-rc6","v2.6.34","v2.6.35-rc3","v2.6.35-rc1","v2.6.35-rc2","v2.6.34-rc7","v2.6.34-rc6","v2.6.34-rc5","v2.6.34-rc4","v2.6.34-rc3","v2.6.34-rc2","v2.6.34-rc1","v2.6.33","v2.6.33-rc6","v2.6.33-rc8","v2.6.33-rc4","v2.6.33-rc5","v2.6.33-rc3","v2.6.33-rc7","v2.6.33-rc2","v2.6.32","v2.6.33-rc1","v2.6.32-rc8","v2.6.32-rc7","v2.6.32-rc6","v2.6.31"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