Out-of-Bounds Affecting kernel-modules-core package, versions <0:5.14.0-427.42.1.el9_4


Severity

Recommended
0.0
medium
0
10

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.04% (6th percentile)

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  • Snyk IDSNYK-RHEL9-KERNELMODULESCORE-7426800
  • published6 Jul 2024
  • disclosed5 Jul 2024

Introduced: 5 Jul 2024

CVE-2024-39472  (opens in a new tab)
CWE-119  (opens in a new tab)

How to fix?

Upgrade RHEL:9 kernel-modules-core to version 0:5.14.0-427.42.1.el9_4 or higher.
This issue was patched in RHSA-2024:8617.

NVD Description

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

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.

CVSS Scores

version 3.1