Medium 5.5Published May 6, 2026

CVE-2026-43171EFI/CPER: don't dump the entire memory region

Updated under an hour ago (Oct 28, 2026, 12:30 PM ET)

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Exploited in the last 30 days

In the Linux kernel, the following vulnerability has been resolved: EFI/CPER: don't dump the entire memory region The current logic at cper_print_fw_err() doesn't check if the error record length is big enough to handle offset. On a bad firmware, if the ofset is above the actual record, length -= offset will underflow, making it dump the entire memory. The end result can be: - the logic taking a lot of time dumping large regions of memory; - data disclosure due to the memory dumps; - an OOPS, if it tries to dump an unmapped memory region. Fix it by checking if the section length is too small before doing a hex dump. [ rjw: Subject tweaks ]

CVSS: 5.5 MEDIUM (v3.1, NVD)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Weakness (CWE): Not given
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Analyzed
Record last updated: May 11, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	3d8c11efd528d56972d44ed0de51c4e11a9a4fa9 builds before 02de64ab54b4bb0f1b21bb324aeff3b08612be33; 3d8c11efd528d56972d44ed0de51c4e11a9a4fa9 builds before 0e09b522f2622841389c3b2f9ac4969e35c0809d; from 3d8c11efd528d56972d44ed0de51c4e11a9a4fa9 before 64ae5aaa7ac93c83da456039e8ec747bfa8a7cff; from 3d8c11efd528d56972d44ed0de51c4e11a9a4fa9 before 5a9b1dda8481b82851a655c3bcc5b44879b95334; from 3d8c11efd528d56972d44ed0de51c4e11a9a4fa9 before 7780c0bad2a3a70a8c0113a33c02f4151d901eb3; from 3d8c11efd528d56972d44ed0de51c4e11a9a4fa9 before a8419f5f2c5f2d80848ddabb2b95cf0da84a5f91; from 3d8c11efd528d56972d44ed0de51c4e11a9a4fa9 before 54e131db4cdffd946db890ff33ff2647053fd4f6; from 3d8c11efd528d56972d44ed0de51c4e11a9a4fa9 before 55cc6fe5716f678f06bcb95140882dfa684464ec	CNA record
linux linux_kernel linux:linux_kernel	after 5.7 before 5.10.252; from 5.11 before 5.15.202; from 5.16 before 6.1.165; from 6.2 before 6.6.128; from 6.7 before 6.12.75; from 6.13 before 6.18.16; from 6.19 before 6.19.6; 5.7; and 1 more ranges	NVD

References

References

https://git.kernel.org/stable/c/02de64ab54b4bb0f1b21bb324aeff3b08612be33	patch
https://git.kernel.org/stable/c/0e09b522f2622841389c3b2f9ac4969e35c0809d	patch
https://git.kernel.org/stable/c/64ae5aaa7ac93c83da456039e8ec747bfa8a7cff	patch
https://git.kernel.org/stable/c/5a9b1dda8481b82851a655c3bcc5b44879b95334	patch
https://git.kernel.org/stable/c/7780c0bad2a3a70a8c0113a33c02f4151d901eb3	patch
https://git.kernel.org/stable/c/a8419f5f2c5f2d80848ddabb2b95cf0da84a5f91	patch
https://git.kernel.org/stable/c/54e131db4cdffd946db890ff33ff2647053fd4f6	patch
https://git.kernel.org/stable/c/55cc6fe5716f678f06bcb95140882dfa684464ec	patch

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.