We use these services and cookies to improve your user experience. You may opt out if you wish, however, this may limit some features on this site.

Please see our statement on Data Privacy.

Zendesk (Helpdesk and Chat)
Bugpilot (Bug tracking)

Ok

THREATINT CVE Home CVE Diag Help
PUBLISHED

CVE-2024-26689

ceph: prevent use-after-free in encode_cap_msg()

Reserved:2024-02-19
Published:2024-04-03
Updated:2024-04-03

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.

Product status

Default status
unaffected

1da177e4c3f4 before 8180d0c27b93
affected

1da177e4c3f4 before 70e329b44076
affected

1da177e4c3f4 before f3f98d7d84b3
affected

1da177e4c3f4 before ae20db45e482
affected

1da177e4c3f4 before 7958c1bf5b03
affected

1da177e4c3f4 before cda4672da1c2
affected

Default status
affected

5.10.210
unaffected

5.15.149
unaffected

6.1.79
unaffected

6.6.18
unaffected

6.7.6
unaffected

6.8
unaffected

References

https://git.kernel.org/stable/c/8180d0c27b93a6eb60da1b08ea079e3926328214

https://git.kernel.org/stable/c/70e329b440762390258a6fe8c0de93c9fdd56c77

https://git.kernel.org/stable/c/f3f98d7d84b31828004545e29fd7262b9f444139

https://git.kernel.org/stable/c/ae20db45e482303a20e56f2db667a9d9c54ac7e7

https://git.kernel.org/stable/c/7958c1bf5b03c6f1f58e724dbdec93f8f60b96fc

https://git.kernel.org/stable/c/cda4672da1c26835dcbd7aec2bfed954eda9b5ef

cve.org CVE-2024-26689

nvd.nist.gov CVE-2024-26689

Download JSON

Share this page
https://cve.threatint.com/CVE/CVE-2024-26689