{"id":"CVE-2026-43171","title":"EFI/CPER: don't dump the entire memory region","summary":"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 ba…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= 3d8c11efd528d56972d44ed0de51c4e11a9a4fa9 < 02de64ab54b4bb0f1b21bb324aeff3b08612be33","Linux >= 3d8c11efd528d56972d44ed0de51c4e11a9a4fa9 < 0e09b522f2622841389c3b2f9ac4969e35c0809d","Linux >= 3d8c11efd528d56972d44ed0de51c4e11a9a4fa9 < 64ae5aaa7ac93c83da456039e8ec747bfa8a7cff","Linux >= 3d8c11efd528d56972d44ed0de51c4e11a9a4fa9 < 5a9b1dda8481b82851a655c3bcc5b44879b95334","Linux >= 3d8c11efd528d56972d44ed0de51c4e11a9a4fa9 < 7780c0bad2a3a70a8c0113a33c02f4151d901eb3","Linux >= 3d8c11efd528d56972d44ed0de51c4e11a9a4fa9 < a8419f5f2c5f2d80848ddabb2b95cf0da84a5f91","Linux >= 3d8c11efd528d56972d44ed0de51c4e11a9a4fa9 < 54e131db4cdffd946db890ff33ff2647053fd4f6","Linux >= 3d8c11efd528d56972d44ed0de51c4e11a9a4fa9 < 55cc6fe5716f678f06bcb95140882dfa684464ec","Linux 5.7"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-11-06T15:30:26.784250Z"},"published":"2026-05-06","updated":"2026-11-06","sourceUpdated":"2026-11-06T15:32:35.552Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-43171","references":[{"url":"https://git.kernel.org/stable/c/02de64ab54b4bb0f1b21bb324aeff3b08612be33"},{"url":"https://git.kernel.org/stable/c/0e09b522f2622841389c3b2f9ac4969e35c0809d"},{"url":"https://git.kernel.org/stable/c/64ae5aaa7ac93c83da456039e8ec747bfa8a7cff"},{"url":"https://git.kernel.org/stable/c/5a9b1dda8481b82851a655c3bcc5b44879b95334"},{"url":"https://git.kernel.org/stable/c/7780c0bad2a3a70a8c0113a33c02f4151d901eb3"},{"url":"https://git.kernel.org/stable/c/a8419f5f2c5f2d80848ddabb2b95cf0da84a5f91"},{"url":"https://git.kernel.org/stable/c/54e131db4cdffd946db890ff33ff2647053fd4f6"},{"url":"https://git.kernel.org/stable/c/55cc6fe5716f678f06bcb95140882dfa684464ec"}],"tags":["cve.org"],"epss":0.00123,"epssPercentile":0.02036,"ingestedAt":"2026-11-06T15:54:04.011Z","slug":"CVE-2026-43171","body":"## Overview\n\nIn 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 ]\n\n## Affected\n\n- `Linux >= 3d8c11efd528d56972d44ed0de51c4e11a9a4fa9 < 02de64ab54b4bb0f1b21bb324aeff3b08612be33`\n- `Linux >= 3d8c11efd528d56972d44ed0de51c4e11a9a4fa9 < 0e09b522f2622841389c3b2f9ac4969e35c0809d`\n- `Linux >= 3d8c11efd528d56972d44ed0de51c4e11a9a4fa9 < 64ae5aaa7ac93c83da456039e8ec747bfa8a7cff`\n- `Linux >= 3d8c11efd528d56972d44ed0de51c4e11a9a4fa9 < 5a9b1dda8481b82851a655c3bcc5b44879b95334`\n- `Linux >= 3d8c11efd528d56972d44ed0de51c4e11a9a4fa9 < 7780c0bad2a3a70a8c0113a33c02f4151d901eb3`\n- `Linux >= 3d8c11efd528d56972d44ed0de51c4e11a9a4fa9 < a8419f5f2c5f2d80848ddabb2b95cf0da84a5f91`\n- `Linux >= 3d8c11efd528d56972d44ed0de51c4e11a9a4fa9 < 54e131db4cdffd946db890ff33ff2647053fd4f6`\n- `Linux >= 3d8c11efd528d56972d44ed0de51c4e11a9a4fa9 < 55cc6fe5716f678f06bcb95140882dfa684464ec`\n- `Linux 5.7`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}