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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2021-47259 Detail

Description

In the Linux kernel, the following vulnerability has been resolved: NFS: Fix use-after-free in nfs4_init_client() KASAN reports a use-after-free when attempting to mount two different exports through two different NICs that belong to the same server. Olga was able to hit this with kernels starting somewhere between 5.7 and 5.10, but I traced the patch that introduced the clear_bit() call to 4.13. So something must have changed in the refcounting of the clp pointer to make this call to nfs_put_client() the very last one.


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/3e3c7ebbfac152d08be75c92802a64a1f6471a15 CVE, kernel.org Patch 
https://git.kernel.org/stable/c/42c10b0db064e45f5c5ae7019bbf2168ffab766c CVE, kernel.org Patch 
https://git.kernel.org/stable/c/476bdb04c501fc64bf3b8464ffddefc8dbe01577 CVE, kernel.org Patch 
https://git.kernel.org/stable/c/72651c6579a25317a90536181d311c663d0329ab CVE, kernel.org Patch 
https://git.kernel.org/stable/c/c3b6cf64dfe4ef96e7341508d50d6998da7062c7 CVE, kernel.org Patch 
https://git.kernel.org/stable/c/c7eab9e2d7b4e983ce280276fb920af649955897 CVE, kernel.org Patch 

Weakness Enumeration

CWE-ID CWE Name Source
CWE-416 Use After Free CISA-ADP  

Known Affected Software Configurations Switch to CPE 2.2

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Change History

5 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2021-47259
NVD Published Date:
05/21/2024
NVD Last Modified:
04/04/2025
Source:
kernel.org