Answer in brief
CVE-2024-26689 records a High severity (CVSS 8.8) vulnerability in ceph: prevent use-after-free in encode_cap_msg(). The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 8.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=9030aaf9bf0a1eee47a154c316c789e959638b0f <8180d0c27b93a6eb60da1b08ea079e3926328214 || >=9030aaf9bf0a1eee47a154c316c789e959638b0f <70e329b440762390258a6fe8c0de93c9fdd56c77 || >=9030aaf9bf0a1eee47a154c316c789e959638b0f <f3f98d7d84b31828004545e29fd7262b9f444139 || >=9030aaf9bf0a1eee47a154c316c789e959638b0f <ae20db45e482303a20e56f2db667a9d9c54ac7e7 || >=9030aaf9bf0a1eee47a154c316c789e959638b0f <7958c1bf5b03c6f1f58e724dbdec93f8f60b96fc || >=9030aaf9bf0a1eee47a154c316c789e959638b0f <cda4672da1c26835dcbd7aec2bfed954eda9b5ef | 8180d0c27b93a6eb60da1b08ea079e3926328214, 70e329b440762390258a6fe8c0de93c9fdd56c77, f3f98d7d84b31828004545e29fd7262b9f444139, ae20db45e482303a20e56f2db667a9d9c54ac7e7, 7958c1bf5b03c6f1f58e724dbdec93f8f60b96fc, cda4672da1c26835dcbd7aec2bfed954eda9b5ef |
| Linux/Linuxgeneric | 2.6.34 | Not reported |
Published upstream
Apr 3, 2024
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 5, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 5, 2026
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.
Quoted source text, attributed separately from HOL analysis.