CVE-2026-68143 Affecting kernel-64k-debug-core package, versions <0:5.14.0-687.48.1.el9_8


Severity

Recommended
high

Based on AlmaLinux security rating.

Threat Intelligence

EPSS
0.14% (4th percentile)

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  • Snyk IDSNYK-ALMALINUX9-KERNEL64KDEBUGCORE-19901516
  • published18 Sept 2026
  • disclosed15 Sept 2026

Introduced: 15 Sep 2026

NewCVE-2026-68143  (opens in a new tab)

How to fix?

Upgrade AlmaLinux:9 kernel-64k-debug-core to version 0:5.14.0-687.48.1.el9_8 or higher.
This issue was patched in ALSA-2026:67470.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-64k-debug-core package and not the kernel-64k-debug-core package as distributed by AlmaLinux. See How to fix? for AlmaLinux:9 relevant fixed versions and status.

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

net: slip: serialize receive against buffer reallocation

sl_realloc_bufs() replaces rbuff and updates buffsize while holding sl->lock. slip_receive_buf() reads those fields and writes through rbuff without holding the lock.

An MTU change can therefore race with receive processing. An MTU shrink can expose the new smaller rbuff with the old larger bound, causing an out-of-bounds write. A receive callback which already loaded the old rbuff can instead continue writing after that buffer has been freed.

Serialize receive processing with sl_realloc_bufs() by holding sl->lock while consuming each receive batch.

CVSS Base Scores

version 3.1