Memory Leak Affecting kernel-uek-devel package, versions <0:4.14.35-2047.543.3.el7uek


Severity

Recommended
high

Based on Oracle Linux security rating.

Threat Intelligence

EPSS
0.04% (6th percentile)

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  • Snyk IDSNYK-ORACLE7-KERNELUEKDEVEL-8370689
  • published14 Nov 2024
  • disclosed17 Aug 2024

Introduced: 17 Aug 2024

CVE-2024-43854  (opens in a new tab)
CWE-401  (opens in a new tab)

How to fix?

Upgrade Oracle:7 kernel-uek-devel to version 0:4.14.35-2047.543.3.el7uek or higher.
This issue was patched in ELSA-2024-12868.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-uek-devel package and not the kernel-uek-devel package as distributed by Oracle. See How to fix? for Oracle:7 relevant fixed versions and status.

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

block: initialize integrity buffer to zero before writing it to media

Metadata added by bio_integrity_prep is using plain kmalloc, which leads to random kernel memory being written media. For PI metadata this is limited to the app tag that isn't used by kernel generated metadata, but for non-PI metadata the entire buffer leaks kernel memory.

Fix this by adding the __GFP_ZERO flag to allocations for writes.

CVSS Scores

version 3.1