Integer Underflow Affecting kernel-rt-debug package, versions *


Severity

Recommended
medium

Based on CentOS security rating.

Threat Intelligence

EPSS
0.02% (7th percentile)

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  • Snyk IDSNYK-CENTOS10-KERNELRTDEBUG-16452382
  • published7 May 2026
  • disclosed6 May 2026

Introduced: 6 May 2026

NewCVE-2026-43171  (opens in a new tab)
CWE-191  (opens in a new tab)

How to fix?

There is no fixed version for Centos:10 kernel-rt-debug.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-rt-debug package and not the kernel-rt-debug package as distributed by Centos. See How to fix? for Centos:10 relevant fixed versions and status.

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 Base Scores

version 3.1