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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2024-42161 Detail

Description

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.


Metrics

 
NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

References to Advisories, Solutions, and Tools

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Hyperlink Resource
https://git.kernel.org/stable/c/009367099eb61a4fc2af44d4eb06b6b4de7de6db Patch 
https://git.kernel.org/stable/c/009367099eb61a4fc2af44d4eb06b6b4de7de6db Patch 
https://git.kernel.org/stable/c/3364c2ed1c241989847f19cf83e3db903ce689e3 Patch 
https://git.kernel.org/stable/c/3364c2ed1c241989847f19cf83e3db903ce689e3 Patch 
https://git.kernel.org/stable/c/7e5471b5efebc30dd0bc035cda86693a5c73d45f Patch 
https://git.kernel.org/stable/c/7e5471b5efebc30dd0bc035cda86693a5c73d45f Patch 
https://git.kernel.org/stable/c/a21d76bd0b0d39518e9a4c19f6cf7c042a974aff Patch 
https://git.kernel.org/stable/c/a21d76bd0b0d39518e9a4c19f6cf7c042a974aff Patch 
https://git.kernel.org/stable/c/b694989bb13ed5f166e633faa1eb0f21c6d261a6 Patch 
https://git.kernel.org/stable/c/b694989bb13ed5f166e633faa1eb0f21c6d261a6 Patch 
https://git.kernel.org/stable/c/ff941a8449e712eaf7efca1a13bfb9afd3d99fc2 Patch 
https://git.kernel.org/stable/c/ff941a8449e712eaf7efca1a13bfb9afd3d99fc2 Patch 

Weakness Enumeration

CWE-ID CWE Name Source
CWE-908 Use of Uninitialized Resource cwe source acceptance level NIST  

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Change History

4 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2024-42161
NVD Published Date:
07/30/2024
NVD Last Modified:
11/21/2024
Source:
kernel.org