CVE-2024-38580 Affecting kernel-rt-debug package, versions <0:5.14.0-427.28.1.el9_4


Severity

Recommended
medium

Based on AlmaLinux security rating.

Threat Intelligence

EPSS
0.05% (18th percentile)

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  • Snyk IDSNYK-ALMALINUX9-KERNELRTDEBUG-8330437
  • published4 Nov 2024
  • disclosed31 Jul 2024

Introduced: 31 Jul 2024

CVE-2024-38580  (opens in a new tab)

How to fix?

Upgrade AlmaLinux:9 kernel-rt-debug to version 0:5.14.0-427.28.1.el9_4 or higher.
This issue was patched in ALSA-2024:4928.

NVD Description

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

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

epoll: be better about file lifetimes

epoll can call out to vfs_poll() with a file pointer that may race with the last 'fput()'. That would make f_count go down to zero, and while the ep->mtx locking means that the resulting file pointer tear-down will be blocked until the poll returns, it means that f_count is already dead, and any use of it won't actually get a reference to the file any more: it's dead regardless.

Make sure we have a valid ref on the file pointer before we call down to vfs_poll() from the epoll routines.

CVSS Scores

version 3.1