{"id":"CVE-2026-43272","summary":"ring-buffer: Fix possible dereference of uninitialized pointer","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nring-buffer: Fix possible dereference of uninitialized pointer\n\nThere is a pointer head_page in rb_meta_validate_events() which is not\ninitialized at the beginning of a function. This pointer can be dereferenced\nif there is a failure during reader page validation. In this case the control\nis passed to \"invalid\" label where the pointer is dereferenced in a loop.\n\nTo fix the issue initialize orig_head and head_page before calling\nrb_validate_buffer.\n\nFound by Linux Verification Center (linuxtesting.org) with SVACE.","modified":"2026-07-15T01:49:17.620964131Z","published":"2026-05-06T11:28:56.162Z","related":["CGA-grvf-j23r-9f88"],"database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43272.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/bc77986f3cb7476637052edf2d87137fa39f153d"},{"type":"WEB","url":"https://git.kernel.org/stable/c/d9942396845fef2369478c157b26738fe07142f6"},{"type":"WEB","url":"https://git.kernel.org/stable/c/f1547779402c4cd67755c33616b7203baa88420b"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43272.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-43272"},{"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":"5f3b6e839f3ceb8d6ef02231ba9b5aca71b8bf55"},{"fixed":"bc77986f3cb7476637052edf2d87137fa39f153d"},{"fixed":"d9942396845fef2369478c157b26738fe07142f6"},{"fixed":"f1547779402c4cd67755c33616b7203baa88420b"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-43272.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"6.12.0"},{"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-2026-43272.json"}}],"schema_version":"1.7.5"}