CVE-2022-49873 Affecting perf package, versions *


Severity

Recommended
0.0
medium
0
10

Based on CentOS security rating.

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  • Snyk IDSNYK-CENTOS8-PERF-9983726
  • published2 May 2025
  • disclosed1 May 2025

Introduced: 1 May 2025

NewCVE-2022-49873  (opens in a new tab)

How to fix?

There is no fixed version for Centos:8 perf.

NVD Description

Note: Versions mentioned in the description apply only to the upstream perf package and not the perf package as distributed by Centos. See How to fix? for Centos:8 relevant fixed versions and status.

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

bpf: Fix wrong reg type conversion in release_reference()

Some helper functions will allocate memory. To avoid memory leaks, the verifier requires the eBPF program to release these memories by calling the corresponding helper functions.

When a resource is released, all pointer registers corresponding to the resource should be invalidated. The verifier use release_references() to do this job, by apply __mark_reg_unknown() to each relevant register.

It will give these registers the type of SCALAR_VALUE. A register that will contain a pointer value at runtime, but of type SCALAR_VALUE, which may allow the unprivileged user to get a kernel pointer by storing this register into a map.

Using __mark_reg_not_init() while NOT allow_ptr_leaks can mitigate this problem.

CVSS Base Scores

version 3.1