Out-of-bounds Write Affecting kernel-debug-devel-matched package, versions *


Severity

Recommended
medium

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.16% (7th percentile)

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  • Snyk IDSNYK-RHEL10-KERNELDEBUGDEVELMATCHED-18938216
  • published19 Aug 2026
  • disclosed15 Aug 2026

Introduced: 15 Aug 2026

NewCVE-2026-72252  (opens in a new tab)
CWE-787  (opens in a new tab)

How to fix?

There is no fixed version for RHEL:10 kernel-debug-devel-matched.

NVD Description

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

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

netfilter: nft_set_pipapo: don't leak bad clone into future transaction

On memory allocation failure the cloned nft_pipapo_match can enter a bad state:

  • some fields can have their lookup tables resized while others did not
  • bits might have been toggled
  • scratch map can be undersized which also means m->bsize_max can be lower than what is required

This means that the next insertion in the same batch can trigger out-of-bounds writes.

Furthermore, a failure in the first can result in the bad clone to leak into the next transaction because the abort callback is never executed in this case (the upper layer saw an error and no attempt to allocate a transactional request was made).

Record a state for the nft_pipapo_match structure:

  • NEW (pristine clone)
  • MOD (modified clone with good state)
  • ERR (potentially bogus content)

Then make it so that deletes and insertions fail when the clone entered ERR state.

In case the very first insert attempt results in an error, free the clone right away.

CVSS Base Scores

version 3.1