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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2022-49873 Detail

Description

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.


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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URL Source(s) Tag(s)
https://git.kernel.org/stable/c/466ce46f251dfb259a8cbaa895ab9edd6fb56240 kernel.org Patch 
https://git.kernel.org/stable/c/ae5ccad6c711db0f2ca1231be051935dd128b8f5 kernel.org Patch 
https://git.kernel.org/stable/c/cedd4f01f67be94735f15123158f485028571037 kernel.org Patch 
https://git.kernel.org/stable/c/f1db20814af532f85e091231223e5e4818e8464b kernel.org Patch 

Weakness Enumeration

CWE-ID CWE Name Source
CWE-704 Incorrect Type Conversion or Cast cwe source acceptance level NIST  

Known Affected Software Configurations Switch to CPE 2.2

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Change History

2 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2022-49873
NVD Published Date:
05/01/2025
NVD Last Modified:
05/07/2025
Source:
kernel.org