CVE-2024-26689

Vulnerability overview

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(...

Affected product and versions

Product

Linux Linux, linux kernel, debian linux

Affected versions

>= 9030aaf9bf0a1eee47a154c316c789e959638b0f < 8180d0c27b93a6eb60da1b08ea079e3926328214, >= 9030aaf9bf0a1eee47a154c316c789e959638b0f < 70e329b440762390258a6fe8c0de93c9fdd56c77, >= 9030aaf9bf0a1eee47a154c316c789e959638b0f < f3f98d7d84b31828004545e29fd7262b9f444139, >= 9030aaf9bf0a1eee47a154c316c789e959638b0f < ae20db45e482303a20e56f2db667a9d9c54ac7e7, >= 9030aaf9bf0a1eee47a154c316c789e959638b0f < 7958c1bf5b03c6f1f58e724dbdec93f8f60b96fc, >= 9030aaf9bf0a1eee47a154c316c789e959638b0f < cda4672da1c26835dcbd7aec2bfed954eda9b5ef, >= 2.6.34, < 5.10.210, >= 5.11 < 5.15.149, >= 5.16 < 6.1.79, >= 6.2 < 6.6.18, >= 6.7 < 6.7.6, 6.8, 10.0

Fixed versions

5.10.210, 5.15.149, 6.1.79, 6.6.18, 6.7.6

Technical data

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CWE

CWE-416