CVE-2024-42161

Medium

In the Linux kernel, the following vulnerability has been resolved: bpf: Avoid uninitialized value in BPF_CORE_READ_BITFIELD [Changes from V1: - Use a default branch in the switch statement to initialize `val'.] GCC warns that `val' may be used uninitialized in the BPF_CRE_READ_BITFIELD macro, defined in bpf_core_read.h as: [...] unsigned long long val; \ [...] \ switch (__CORE_RELO(s, field, BYTE_SIZE)) { \ case 1: val = *(const unsigned char *)p; break; \ case 2: val = *(const unsigned short *)p; break; \ case 4: val = *(const unsigned int *)p; break; \ case 8: val = *(const unsigned long long *)p; break; \ } \ [...] val; \ } \ This patch adds a default entry in the switch statement that sets `val' to zero in order to avoid the warning, and random values to be used in case __builtin_preserve_field_info returns unexpected values for BPF_FIELD_BYTE_SIZE. Tested in bpf-next master. No regressions.

Package Linux Kernel
Published 2024-07-30
Last modified 2025-11-03
CVSS version 3.1
Patch available
Yes

CVSS 3.1 score

6.3

out of 10
Medium
Attack Vector
Local
Attack Complexity
Low
Privileges Required
High
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
High
Availability
High
Vector string
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:L/I:H/A:H

Weakness type

CWE-908

CVE-2024-42161 is classified as CWE-908

See CWE-908 on MITRE CWE for full details on this weakness type.

Affected versions

Linux kernel versions 5.5 and later are affected. Fixed in 5.10.222, 5.15.163, 6.1.98, 6.6.39, 6.9.9, 6.10 and their respective stable series.

Affected from
≥ 5.5
Fixed in
✓ 5.10.222 5.10.x ✓ 5.15.163 5.15.x ✓ 6.1.98 6.1.x ✓ 6.6.39 6.6.x ✓ 6.9.9 6.9.x ✓ 6.10

References

7 total
Showing 5 of 7 references View all on NVD

Frequently asked questions

  • What is CVE-2024-42161?

    CVE-2024-42161 is a Medium severity Linux kernel vulnerability with a CVSS score of 6.3 out of 10 . It affects Linux kernel versions from 5.5 onward and has been patched in 5.10.222, 5.15.163, 6.1.98 and others. CVE-2024-42161 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

  • What is the CVSS score for CVE-2024-42161?

    CVE-2024-42161 has a CVSS score of 6.3 out of 10, rated Medium severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:L/I:H/A:H .

  • Is there a patch available for CVE-2024-42161?

    Yes. CVE-2024-42161 has been patched. Fixed versions include 5.10.222, 5.15.163, 6.1.98 and others. If you are running Linux kernel 5.5 or later up to the fix versions, apply the relevant patch for your kernel branch.

  • Is CVE-2024-42161 actively exploited?

    No. CVE-2024-42161 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

Back to
All CVEs
View on
NVD / NIST