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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2024-26689 Detail

Description

In the Linux kernel, the following vulnerability has been resolved: ceph: prevent use-after-free in encode_cap_msg() In fs/ceph/caps.c, in encode_cap_msg(), "use after free" error was caught by KASAN at this line - 'ceph_buffer_get(arg->xattr_buf);'. This implies before the refcount could be increment here, it was freed. In same file, in "handle_cap_grant()" refcount is decremented by this line - 'ceph_buffer_put(ci->i_xattrs.blob);'. It appears that a race occurred and resource was freed by the latter line before the former line could increment it. encode_cap_msg() is called by __send_cap() and __send_cap() is called by ceph_check_caps() after calling __prep_cap(). __prep_cap() is where arg->xattr_buf is assigned to ci->i_xattrs.blob. This is the spot where the refcount must be increased to prevent "use after free" error.


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/70e329b440762390258a6fe8c0de93c9fdd56c77 CVE, kernel.org Patch 
https://git.kernel.org/stable/c/7958c1bf5b03c6f1f58e724dbdec93f8f60b96fc CVE, kernel.org Patch 
https://git.kernel.org/stable/c/8180d0c27b93a6eb60da1b08ea079e3926328214 CVE, kernel.org Patch 
https://git.kernel.org/stable/c/ae20db45e482303a20e56f2db667a9d9c54ac7e7 CVE, kernel.org Patch 
https://git.kernel.org/stable/c/cda4672da1c26835dcbd7aec2bfed954eda9b5ef CVE, kernel.org Patch 
https://git.kernel.org/stable/c/f3f98d7d84b31828004545e29fd7262b9f444139 CVE, kernel.org Patch 
https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html CVE Mailing List 

Weakness Enumeration

CWE-ID CWE Name Source
CWE-416 Use After Free cwe source acceptance level NIST  

Known Affected Software Configurations Switch to CPE 2.2

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Change History

7 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2024-26689
NVD Published Date:
04/03/2024
NVD Last Modified:
01/14/2025
Source:
kernel.org