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, 7:00 PM ET)

Does this affect you?

It affects Linux and 1 other product. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

Do this next

Start free and add your stack

Free account, 1 product

Every CVE for Linux

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.