{"id":"CVE-2026-80881","summary":"ocfs2: fix buffer head management in ocfs2_read_blocks()","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nocfs2: fix buffer head management in ocfs2_read_blocks()\n\nIn ocfs2_read_blocks(), caller should't assume that buffer head returned\nby 'sb_getblk()' is exclusively owned and so 'put_bh()' always drops\nb_count from 1 to 0.  If it is not so, buffer head remains on hold and\nlikely to be returned by the next call to 'sb_getblk()' unchanged - that\nis, with BH_Uptodate bit set even if it has failed validation previously,\nthus allowing to insert that buffer head into OCFS2 metadata cache and\nsubmit it to upper layers.  To avoid such a scenario, BH_Uptodate should\nbe cleared immediately after 'validate()' callback has detected some data\ninconsistency.","modified":"2026-10-08T02:52:06.723288899Z","published":"2026-09-04T16:49:11.758Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/80xxx/CVE-2026-80881.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/0e389fc290c350c67591abf4c367119f4689f310"},{"type":"WEB","url":"https://git.kernel.org/stable/c/4ab17e328522a4df5fe0f0dcf39098118b1feeaa"},{"type":"WEB","url":"https://git.kernel.org/stable/c/5927acb3e2c99985a14adecd9d1b67ba191c622d"},{"type":"WEB","url":"https://git.kernel.org/stable/c/61f7a5acb3bf8fc97dad78f54b1e8d0e1c819766"},{"type":"WEB","url":"https://git.kernel.org/stable/c/6371a07148ee979af22a9d6f4c277462953a9a4a"},{"type":"WEB","url":"https://git.kernel.org/stable/c/9e7a057934cdd58e4cc94350bcfe5367bbee0f8e"},{"type":"WEB","url":"https://git.kernel.org/stable/c/a4eae1499c760949a93459d11390bd1fd823d31d"},{"type":"WEB","url":"https://git.kernel.org/stable/c/ecb3f9386f4353034caef77239473c627232db17"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/80xxx/CVE-2026-80881.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-80881"},{"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":"cf76c78595ca87548ca5e45c862ac9e0949c4687"},{"fixed":"a4eae1499c760949a93459d11390bd1fd823d31d"},{"fixed":"4ab17e328522a4df5fe0f0dcf39098118b1feeaa"},{"fixed":"5927acb3e2c99985a14adecd9d1b67ba191c622d"},{"fixed":"ecb3f9386f4353034caef77239473c627232db17"},{"fixed":"61f7a5acb3bf8fc97dad78f54b1e8d0e1c819766"},{"fixed":"0e389fc290c350c67591abf4c367119f4689f310"},{"fixed":"9e7a057934cdd58e4cc94350bcfe5367bbee0f8e"},{"fixed":"6371a07148ee979af22a9d6f4c277462953a9a4a"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"4.4.204"},{"fixed":"4.5"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"4.9.204"},{"fixed":"4.10"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"4.14.157"},{"fixed":"4.15"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"4.19.87"},{"fixed":"4.20"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"01f93d5e36753fc4d06ec67f05ce78c9c6f2dd56"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"65cbd1279f4b999d56a838344a30642db24cd215"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"97e1db17bc1ef4c2e1789bc9323c7be44fba53f8"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"6c150df9c2e80b5cf86f5a0d98beb7390ad63bfc"}]}],"versions":["v4.4.302","v4.4.301","v4.4.300","v4.4.299","v4.4.298","v4.4.297","v4.4.296","v4.4.295","v4.4.294","v4.4.293","v4.4.292","v4.4.291","v4.4.290","v4.4.289","v4.4.288","v4.4.287","v4.4.286","v4.4.285","v4.4.284","v4.4.283","v4.4.282","v4.4.281","v4.4.280","v4.4.279","v4.4.278","v4.4.277","v4.4.276","v4.4.275","v4.4.274","v4.4.273","v4.4.272","v4.4.271","v4.4.270","v4.4.269","v4.4.268","v4.4.267","v4.4.266","v4.4.265","v4.4.264","v4.4.263","v4.4.262","v4.4.261","v4.4.260","v4.4.259","v4.4.258","v4.4.257","v4.4.256","v4.4.255","v4.4.254","v4.4.253","v4.4.252","v4.4.251","v4.4.250","v4.4.249","v4.4.248","v4.4.247","v4.4.246","v4.4.245","v4.4.244","v4.4.243","v4.4.242","v4.4.241","v4.4.240","v4.4.239","v4.4.238","v4.4.237","v4.4.236","v4.4.235","v4.4.234","v4.4.233","v4.4.232","v4.4.231","v4.4.230","v4.4.229","v4.4.228","v4.4.227","v4.4.226","v4.4.225","v4.4.224","v4.4.223","v4.4.222","v4.4.221","v4.4.220","v4.4.219","v4.4.218","v4.4.217","v4.4.216","v4.4.215","v4.4.214","v4.4.213","v4.4.212","v4.4.211","v4.4.210","v4.4.209","v4.4.208","v4.4.207","v4.4.206","v4.4.205","v4.4.204","v4.9.337","v4.9.336","v4.9.335","v4.9.334","v4.9.333","v4.9.332","v4.9.331","v4.9.330","v4.9.329","v4.9.328","v4.9.327","v4.9.326","v4.9.325","v4.9.324","v4.9.323","v4.9.322","v4.9.321","v4.9.320","v4.9.319","v4.9.318","v4.9.317","v4.9.316","v4.9.315","v4.9.314","v4.9.313","v4.9.312","v4.9.311","v4.9.310","v4.9.309","v4.9.308","v4.9.307","v4.9.306","v4.9.305","v4.9.304","v4.9.303","v4.9.302","v4.9.301","v4.9.300","v4.9.299","v4.9.298","v4.9.297","v4.9.296","v4.9.295","v4.9.294","v4.9.293","v4.9.292","v4.9.291","v4.9.290","v4.9.289","v4.9.288","v4.9.287","v4.9.286","v4.9.285","v4.9.284","v4.9.283","v4.9.282","v4.9.281","v4.9.280","v4.9.279","v4.9.278","v4.9.277","v4.9.276","v4.9.275","v4.9.274","v4.9.273","v4.9.272","v4.9.271","v4.9.270","v4.9.269","v4.9.268"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