{"id":"CVE-2026-43171","summary":"EFI/CPER: don't dump the entire memory region","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nEFI/CPER: don't dump the entire memory region\n\nThe current logic at cper_print_fw_err() doesn't check if the\nerror record length is big enough to handle offset. On a bad firmware,\nif the ofset is above the actual record, length -= offset will\nunderflow, making it dump the entire memory.\n\nThe end result can be:\n\n - the logic taking a lot of time dumping large regions of memory;\n - data disclosure due to the memory dumps;\n - an OOPS, if it tries to dump an unmapped memory region.\n\nFix it by checking if the section length is too small before doing\na hex dump.\n\n[ rjw: Subject tweaks ]","modified":"2026-07-02T09:29:16.829509173Z","published":"2026-05-06T11:27:46.698Z","related":["SUSE-SU-2026:2722-1"],"database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43171.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/02de64ab54b4bb0f1b21bb324aeff3b08612be33"},{"type":"WEB","url":"https://git.kernel.org/stable/c/0e09b522f2622841389c3b2f9ac4969e35c0809d"},{"type":"WEB","url":"https://git.kernel.org/stable/c/54e131db4cdffd946db890ff33ff2647053fd4f6"},{"type":"WEB","url":"https://git.kernel.org/stable/c/55cc6fe5716f678f06bcb95140882dfa684464ec"},{"type":"WEB","url":"https://git.kernel.org/stable/c/5a9b1dda8481b82851a655c3bcc5b44879b95334"},{"type":"WEB","url":"https://git.kernel.org/stable/c/64ae5aaa7ac93c83da456039e8ec747bfa8a7cff"},{"type":"WEB","url":"https://git.kernel.org/stable/c/7780c0bad2a3a70a8c0113a33c02f4151d901eb3"},{"type":"WEB","url":"https://git.kernel.org/stable/c/a8419f5f2c5f2d80848ddabb2b95cf0da84a5f91"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43171.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-43171"},{"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":"3d8c11efd528d56972d44ed0de51c4e11a9a4fa9"},{"fixed":"02de64ab54b4bb0f1b21bb324aeff3b08612be33"},{"fixed":"0e09b522f2622841389c3b2f9ac4969e35c0809d"},{"fixed":"64ae5aaa7ac93c83da456039e8ec747bfa8a7cff"},{"fixed":"5a9b1dda8481b82851a655c3bcc5b44879b95334"},{"fixed":"7780c0bad2a3a70a8c0113a33c02f4151d901eb3"},{"fixed":"a8419f5f2c5f2d80848ddabb2b95cf0da84a5f91"},{"fixed":"54e131db4cdffd946db890ff33ff2647053fd4f6"},{"fixed":"55cc6fe5716f678f06bcb95140882dfa684464ec"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-43171.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"5.7.0"},{"fixed":"5.10.252"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.11.0"},{"fixed":"5.15.202"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.16.0"},{"fixed":"6.1.165"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.2.0"},{"fixed":"6.6.128"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.75"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.16"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"6.19.6"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-43171.json"}}],"schema_version":"1.7.5"}