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Debian: CVE-2024-26884: linux -- security update

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Debian: CVE-2024-26884: linux -- security update

Severity
7
CVSS
(AV:L/AC:L/Au:S/C:C/I:C/A:C)
Published
04/17/2024
Created
05/08/2024
Added
05/08/2024
Modified
01/28/2025

Description

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.

Solution(s)

  • debian-upgrade-linux

References

  • https://attackerkb.com/topics/cve-2024-26884
  • CVE - 2024-26884
  • DSA-5681-1
  • 查看数 697
  • 已创建
  • 最后回复

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