Use After Free Affecting kernel-livepatch-6_4_0-150600_10_5-rt package, versions <1-150600.1.5.1


Severity

Recommended
0.0
medium
0
10

Based on SUSE Linux Enterprise Server security rating.

Threat Intelligence

EPSS
0.25% (17th percentile)

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  • Snyk IDSNYK-SLES156-KERNELLIVEPATCH640150600105RT-7725021
  • published21 Aug 2024
  • disclosed20 Aug 2024

Introduced: 20 Aug 2024

CVE-2024-38630  (opens in a new tab)
CWE-416  (opens in a new tab)

How to fix?

Upgrade SLES:15.6 kernel-livepatch-6_4_0-150600_10_5-rt to version 1-150600.1.5.1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-livepatch-6_4_0-150600_10_5-rt package and not the kernel-livepatch-6_4_0-150600_10_5-rt package as distributed by SLES. See How to fix? for SLES:15.6 relevant fixed versions and status.

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

watchdog: cpu5wdt.c: Fix use-after-free bug caused by cpu5wdt_trigger

When the cpu5wdt module is removing, the origin code uses del_timer() to de-activate the timer. If the timer handler is running, del_timer() could not stop it and will return directly. If the port region is released by release_region() and then the timer handler cpu5wdt_trigger() calls outb() to write into the region that is released, the use-after-free bug will happen.

Change del_timer() to timer_shutdown_sync() in order that the timer handler could be finished before the port region is released.

CVSS Base Scores

version 3.1