UBUNTU-CVE-2026-80881
Dashboard / Vulnerabilities / UBUNTU-CVE-2026-80881
Summary:
Details: In the Linux kernel, the following vulnerability has been resolved: ocfs2: fix buffer head management in ocfs2_read_blocks() In ocfs2_read_blocks(), caller should't assume that buffer head returned by 'sb_getblk()' is exclusively owned and so 'put_bh()' always drops b_count from 1 to 0. If it is not so, buffer head remains on hold and likely to be returned by the next call to 'sb_getblk()' unchanged - that is, with BH_Uptodate bit set even if it has failed validation previously, thus allowing to insert that buffer head into OCFS2 metadata cache and submit it to upper layers. To avoid such a scenario, BH_Uptodate should be cleared immediately after 'validate()' callback has detected some data inconsistency.
References: https://ubuntu.com/security/CVE-2026-80881, https://www.cve.org/CVERecord?id=CVE-2026-80881, https://git.kernel.org/linus/6371a07148ee979af22a9d6f4c277462953a9a4a
Affected packages
Package
Name: linux-aws
Purl: pkg:deb/ubuntu/linux-aws?arch=source&distro=esm-infra-legacy%2Ftrusty
Affected ranges
Type: ECOSYSTEM
Events:
