Out-of-bounds Read Affecting kernel-debug-modules-extra package, versions <0:5.14.0-687.12.1.el9_8


Severity

Recommended
high

Based on Rocky Linux security rating.

Threat Intelligence

EPSS
0.07% (21st percentile)

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  • Snyk IDSNYK-ROCKY9-KERNELDEBUGMODULESEXTRA-17110914
  • published31 May 2026
  • disclosed6 May 2026

Introduced: 6 May 2026

NewCVE-2026-43190  (opens in a new tab)
CWE-125  (opens in a new tab)

How to fix?

Upgrade Rocky-Linux:9 kernel-debug-modules-extra to version 0:5.14.0-687.12.1.el9_8 or higher.
This issue was patched in RLSA-2026:21556.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-debug-modules-extra package and not the kernel-debug-modules-extra package as distributed by Rocky-Linux. See How to fix? for Rocky-Linux:9 relevant fixed versions and status.

In the Linux kernel, the following vulnerability has been resolved:

netfilter: xt_tcpmss: check remaining length before reading optlen

Quoting reporter: In net/netfilter/xt_tcpmss.c (lines 53-68), the TCP option parser reads op[i+1] directly without validating the remaining option length.

If the last byte of the option field is not EOL/NOP (0/1), the code attempts to index op[i+1]. In the case where i + 1 == optlen, this causes an out-of-bounds read, accessing memory past the optlen boundary (either reading beyond the stack buffer _opt or the following payload).

CVSS Base Scores

version 3.1