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Ubuntu: (CVE-2024-26590): linux-raspi-realtime vulnerability

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Ubuntu: (CVE-2024-26590): linux-raspi-realtime vulnerability

Severity
4
CVSS
(AV:L/AC:M/Au:N/C:P/I:P/A:P)
Published
02/22/2024
Created
02/12/2025
Added
02/11/2025
Modified
02/11/2025

Description

In the Linux kernel, the following vulnerability has been resolved: erofs: fix inconsistent per-file compression format EROFS can select compression algorithms on a per-file basis, and each per-file compression algorithm needs to be marked in the on-disk superblock for initialization. However, syzkaller can generate inconsistent crafted images that use an unsupported algorithmtype for specific inodes, e.g. use MicroLZMA algorithmtype even it's not set in `sbi->available_compr_algs`.This can lead to an unexpected "BUG: kernel NULL pointer dereference" if the corresponding decompressor isn't built-in. Fix this by checking against `sbi->available_compr_algs` for each m_algorithmformat request.Incorrect !erofs_sb_has_compr_cfgs preset bitmap is now fixed together since it was harmless previously.

Solution(s)

  • ubuntu-upgrade-linux-raspi-realtime

References

  • https://attackerkb.com/topics/cve-2024-26590
  • CVE - 2024-26590
  • https://git.kernel.org/stable/c/118a8cf504d7dfa519562d000f423ee3ca75d2c4
  • https://git.kernel.org/stable/c/823ba1d2106019ddf195287ba53057aee33cf724
  • https://git.kernel.org/stable/c/eed24b816e50c6cd18cbee0ff0d7218c8fced199
  • https://www.cve.org/CVERecord?id=CVE-2024-26590
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