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Stack-based Buffer Overflow The advisory has been revoked - it doesn't affect any version of package kernel-debug-modules-internal  (opens in a new tab)

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  • Snyk IDSNYK-CENTOS8-KERNELDEBUGMODULESINTERNAL-6654839
  • published18 Apr 2024
  • disclosed17 Apr 2024
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Introduced: 17 Apr 2024

CVE-2024-26884  (opens in a new tab)
CWE-121  (opens in a new tab)

Amendment

The Centos security team deemed this advisory irrelevant for Centos:8.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-debug-modules-internal package and not the kernel-debug-modules-internal package as distributed by Centos.

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

bpf: Fix hashtab overflow check on 32-bit arches

The hashtab code relies on roundup_pow_of_two() to compute the number of hash buckets, and contains an overflow check by checking if the resulting value is 0. However, on 32-bit arches, the roundup code itself can overflow by doing a 32-bit left-shift of an unsigned long value, which is undefined behaviour, so it is not guaranteed to truncate neatly. This was triggered by syzbot on the DEVMAP_HASH type, which contains the same check, copied from the hashtab code. So apply the same fix to hashtab, by moving the overflow check to before the roundup.

References