Riskcovery

CVE-2024-39472

xfs: fix log recovery buffer allocation for the legacy h_size fixup

State
Published
Severity
7.3 High
Published
Jul 5, 2024
Updated
Aug 5, 2026
Reserved
Jun 25, 2024

Read the record on cve.org

Description

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

xfs: fix log recovery buffer allocation for the legacy h_size fixup

Commit a70f9fe52daa ("xfs: detect and handle invalid iclog size set by mkfs") added a fixup for incorrect h_size values used for the initial umount record in old xfsprogs versions. Later commit 0c771b99d6c9 ("xfs: clean up calculation of LR header blocks") cleaned up the log reover buffer calculation, but stoped using the fixed up h_size value to size the log recovery buffer, which can lead to an out of bounds access when the incorrect h_size does not come from the old mkfs tool, but a fuzzer.

Fix this by open coding xlog_logrec_hblks and taking the fixed h_size into account for this calculation.

Scores

CVSSScoreVectorSource
3.17.3 HighCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:HLinux

Weaknesses

The record names no weakness.

Affected Products

ProductVersions
LinuxLinux
  • 0c771b99d6c9a0552fea5cc43669b726dad8f659 to before f754591b17d0ee91c2b45fe9509d0cdc420527cbAffected
  • 0c771b99d6c9a0552fea5cc43669b726dad8f659 to before 57835c0e7152e36b03875dd6c56dfeed685c1b1fAffected
  • 0c771b99d6c9a0552fea5cc43669b726dad8f659 to before c2389c074973aa94e34992e7f66dac0de37595b5Affected
  • 0c771b99d6c9a0552fea5cc43669b726dad8f659 to before 45cf976008ddef4a9c9a30310c9b4fb2a9a6602aAffected
LinuxLinux
  • 5.10Affected
  • before 5.10Not affected
  • 5.15.165 through 5.15.*Not affected
  • 6.1.105 through 6.1.*Not affected
  • 6.6.46 through 6.6.*Not affected
  • 6.10 and laterNot affected

References

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