{"cve":"CVE-2026-80881","nvd":{"published":"2026-09-04T17:17:00.390","modified":"2026-09-04T17:17:00.390","status":"Received","description":"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.","cvss_v4":null,"cvss_v3":null,"cwes":[],"references":["https://git.kernel.org/stable/c/0e389fc290c350c67591abf4c367119f4689f310","https://git.kernel.org/stable/c/4ab17e328522a4df5fe0f0dcf39098118b1feeaa","https://git.kernel.org/stable/c/5927acb3e2c99985a14adecd9d1b67ba191c622d","https://git.kernel.org/stable/c/61f7a5acb3bf8fc97dad78f54b1e8d0e1c819766","https://git.kernel.org/stable/c/6371a07148ee979af22a9d6f4c277462953a9a4a"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:52:03.409947763+00:00"},"epss":{"cve":"CVE-2026-80881","score":0.0022,"percentile":0.12523,"date":"2026-11-01"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}