{"id":"CVE-2026-43166","summary":"erofs: fix interlaced plain identification for encoded extents","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nerofs: fix interlaced plain identification for encoded extents\n\nOnly plain data whose start position and on-disk physical length are\nboth aligned to the block size should be classified as interlaced\nplain extents. Otherwise, it must be treated as shifted plain extents.\n\nThis issue was found by syzbot using a crafted compressed image\ncontaining plain extents with unaligned physical lengths, which can\ncause OOB read in z_erofs_transform_plain().","modified":"2026-07-15T01:48:54.428604311Z","published":"2026-05-06T11:27:43.242Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43166.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/4a2d046e4b13202a6301a993961f5b30ae4d7119"},{"type":"WEB","url":"https://git.kernel.org/stable/c/9d5a97bc71ed5783687705c708454c4453aa91d1"},{"type":"WEB","url":"https://git.kernel.org/stable/c/d3790f26d38606f020212486359b84632c19d08b"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43166.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-43166"},{"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":"1d191b4ca51d73699cb127386b95ac152af2b930"},{"fixed":"9d5a97bc71ed5783687705c708454c4453aa91d1"},{"fixed":"d3790f26d38606f020212486359b84632c19d08b"},{"fixed":"4a2d046e4b13202a6301a993961f5b30ae4d7119"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-43166.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"6.15.0"},{"fixed":"6.18.16"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"6.19.6"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-43166.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H"}]}