CVE-2024-47703 Affecting kernel-syms-azure package, versions <6.4.0-150600.8.20.1


Severity

Recommended
0.0
medium
0
10

Based on SUSE Linux Enterprise Server security rating.

Threat Intelligence

EPSS
0.04% (6th percentile)

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  • Snyk IDSNYK-SLES156-KERNELSYMSAZURE-8503424
  • published14 Dec 2024
  • disclosed13 Dec 2024

Introduced: 13 Dec 2024

NewCVE-2024-47703  (opens in a new tab)

How to fix?

Upgrade SLES:15.6 kernel-syms-azure to version 6.4.0-150600.8.20.1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-syms-azure package and not the kernel-syms-azure 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:

bpf, lsm: Add check for BPF LSM return value

A bpf prog returning a positive number attached to file_alloc_security hook makes kernel panic.

This happens because file system can not filter out the positive number returned by the LSM prog using IS_ERR, and misinterprets this positive number as a file pointer.

Given that hook file_alloc_security never returned positive number before the introduction of BPF LSM, and other BPF LSM hooks may encounter similar issues, this patch adds LSM return value check in verifier, to ensure no unexpected value is returned.

CVSS Scores

version 3.1