CVE-2024-26689

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Source
https://cve.org/CVERecord?id=CVE-2024-26689
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2024-26689.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2024-26689
Downstream
Related
Published
2024-04-03T14:54:50.885Z
Modified
2026-05-18T05:56:02.967061212Z
Summary
ceph: prevent use-after-free in encode_cap_msg()
Details

In the Linux kernel, the following vulnerability has been resolved:

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

In fs/ceph/caps.c, in encodecapmsg(), "use after free" error was caught by KASAN at this line - 'cephbufferget(arg->xattr_buf);'. This implies before the refcount could be increment here, it was freed.

In same file, in "handlecapgrant()" refcount is decremented by this line - 'cephbufferput(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.

encodecapmsg() is called by __send_cap() and __sendcap() is called by cephcheck_caps() after calling __prep_cap(). _prepcap() is where arg->xattrbuf is assigned to ci->ixattrs.blob. This is the spot where the refcount must be increased to prevent "use after free" error.

Database specific 
{
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/26xxx/CVE-2024-26689.json",
    "cna_assigner": "Linux"
}
References

Affected packages

Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git

Affected ranges

Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
9030aaf9bf0a1eee47a154c316c789e959638b0f
Fixed
8180d0c27b93a6eb60da1b08ea079e3926328214
Fixed
70e329b440762390258a6fe8c0de93c9fdd56c77
Fixed
f3f98d7d84b31828004545e29fd7262b9f444139
Fixed
ae20db45e482303a20e56f2db667a9d9c54ac7e7
Fixed
7958c1bf5b03c6f1f58e724dbdec93f8f60b96fc
Fixed
cda4672da1c26835dcbd7aec2bfed954eda9b5ef

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2024-26689.json"

Linux / Kernel

Package

Name
Kernel

Affected ranges

Type
ECOSYSTEM
Events
Introduced
2.6.34
Fixed
5.10.210
Type
ECOSYSTEM
Events
Introduced
5.11.0
Fixed
5.15.149
Type
ECOSYSTEM
Events
Introduced
5.16.0
Fixed
6.1.79
Type
ECOSYSTEM
Events
Introduced
6.2.0
Fixed
6.6.18
Type
ECOSYSTEM
Events
Introduced
6.7.0
Fixed
6.7.6

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2024-26689.json"