Use After Free Affecting kernel-livepatch-6_4_0-150600_10_26-rt package, versions <1-150600.1.3.1


Severity

Recommended
0.0
medium
0
10

Based on SUSE Linux Enterprise Server security rating.

Threat Intelligence

EPSS
0.23% (14th percentile)

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  • Snyk IDSNYK-SLES156-KERNELLIVEPATCH6401506001026RT-8728933
  • published15 Feb 2025
  • disclosed14 Feb 2025

Introduced: 14 Feb 2025

CVE-2024-56675  (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_26-rt to version 1-150600.1.3.1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-livepatch-6_4_0-150600_10_26-rt package and not the kernel-livepatch-6_4_0-150600_10_26-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:

bpf: Fix UAF via mismatching bpf_prog/attachment RCU flavors

Uprobes always use bpf_prog_run_array_uprobe() under tasks-trace-RCU protection. But it is possible to attach a non-sleepable BPF program to a uprobe, and non-sleepable BPF programs are freed via normal RCU (see __bpf_prog_put_noref()). This leads to UAF of the bpf_prog because a normal RCU grace period does not imply a tasks-trace-RCU grace period.

Fix it by explicitly waiting for a tasks-trace-RCU grace period after removing the attachment of a bpf_prog to a perf_event.

CVSS Base Scores

version 3.1