{"id":"CVE-2026-72438","summary":"md/raid10: fix writes_pending and barrier reference leaks on discard failures","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nmd/raid10: fix writes_pending and barrier reference leaks on discard failures\n\nraid10_make_request() acquires a writes_pending reference with\nmd_write_start() before calling raid10_handle_discard(). Several failure\npaths in raid10_handle_discard() complete the bio and return without\nreleasing the corresponding reference, causing md_write_end() to be\nskipped.\n\nCall md_write_end() before returning from these failure paths to keep\nwrites_pending accounting balanced.\n\nAdditionally, discard split allocation failures can occur after\nwait_barrier() succeeds. Those paths return without calling\nallow_barrier(), leaking the associated barrier reference.\n\nRelease the barrier before returning from those paths.","modified":"2026-10-20T17:27:19.956015403Z","published":"2026-08-15T05:56:51.384Z","related":["SUSE-SU-2026:23881-1","SUSE-SU-2026:23887-1","SUSE-SU-2026:23897-1","SUSE-SU-2026:23902-1","SUSE-SU-2026:24181-1","SUSE-SU-2026:24182-1","SUSE-SU-2026:4640-1","SUSE-SU-2026:4706-1","openSUSE-SU-2026:21910-1"],"database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/72xxx/CVE-2026-72438.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/11b35d1906a7277a3d64afe34224133b44327328"},{"type":"WEB","url":"https://git.kernel.org/stable/c/393d687131d8aa8c7e4de2cb494438e145d20fc2"},{"type":"WEB","url":"https://git.kernel.org/stable/c/d1324b41dabd26787559efaeb430643c627c1eb0"},{"type":"WEB","url":"https://git.kernel.org/stable/c/fea33968592559a55a3f5a96a6386bebcaf988a8"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/72xxx/CVE-2026-72438.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-72438"},{"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":"c9aa889b035fca4598ae985a0f0c76ebbb547ad2"},{"fixed":"fea33968592559a55a3f5a96a6386bebcaf988a8"},{"fixed":"11b35d1906a7277a3d64afe34224133b44327328"},{"fixed":"d1324b41dabd26787559efaeb430643c627c1eb0"},{"fixed":"393d687131d8aa8c7e4de2cb494438e145d20fc2"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"5.15.111"},{"fixed":"5.16"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"39db562b3fedb93978a7e42dd216b306740959f8"}]}],"versions":["v5.15.223","v5.15.222","v5.15.221","v5.15.220","v5.15.219","v5.15.218","v5.15.217","v5.15.216","v5.15.215","v5.15.214","v5.15.213","v5.15.212","v5.15.211","v5.15.210","v5.15.209","v5.15.208","v5.15.207","v5.15.206","v5.15.205","v5.15.204","v5.15.203","v5.15.202","v5.15.201","v5.15.200","v5.15.199","v5.15.198","v5.15.197","v5.15.196","v5.15.195","v5.15.194","v5.15.193","v5.15.192","v5.15.191","v5.15.190","v5.15.189","v5.15.188","v5.15.187","v5.15.186","v5.15.185","v5.15.184","v5.15.183","v5.15.182","v5.15.181","v5.15.180","v5.15.179","v5.15.178","v5.15.177","v5.15.176","v5.15.175","v5.15.174","v5.15.173","v5.15.172","v5.15.171","v5.15.170","v5.15.169","v5.15.168","v5.15.167","v5.15.166","v5.15.165","v5.15.164","v5.15.163","v5.15.162","v5.15.161","v5.15.160","v5.15.159","v5.15.158","v5.15.157","v5.15.156","v5.15.155","v5.15.154","v5.15.153","v5.15.152","v5.15.151","v5.15.150","v5.15.149","v5.15.148","v5.15.147","v5.15.146","v5.15.145","v5.15.144","v5.15.143","v5.15.142","v5.15.141","v5.15.140","v5.15.139","v5.15.138","v5.15.137","v5.15.136","v5.15.135","v5.15.134","v5.15.133","v5.15.132","v5.15.131","v5.15.130","v5.15.129","v5.15.128","v5.15.127","v5.15.126","v5.15.125","v5.15.124","v5.15.123","v5.15.122","v5.15.121","v5.15.120","v5.15.119","v5.15.118","v5.15.117","v5.15.116","v5.15.115","v5.15.114","v5.15.113","v5.15.112","v5.15.111"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-72438.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"5.17.0"},{"fixed":"6.12.111"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.53"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.1.5"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-72438.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}]}