Answer in brief
CVE-2024-56706 records a Unknown severity vulnerability in s390/cpum_sf: Fix and protect memory allocation of SDBs with mutex. 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.
A CVSS score is not reported in the current record. 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 | >=8a6fe8f21ec4f049a7b1fe120ad50a5065a9c7a8 <4b3bdfa89635db6a53e02955548bd07bebcae233 || >=8a6fe8f21ec4f049a7b1fe120ad50a5065a9c7a8 <f55bd479d8663a4a4e403b3d308d3d1aa33d92df | 4b3bdfa89635db6a53e02955548bd07bebcae233, f55bd479d8663a4a4e403b3d308d3d1aa33d92df |
| Linux/Linuxgeneric | 6.12 | Not reported |
Published upstream
Dec 28, 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: s390/cpum_sf: Fix and protect memory allocation of SDBs with mutex Reservation of the PMU hardware is done at first event creation and is protected by a pair of mutex_lock() and mutex_unlock(). After reservation of the PMU hardware the memory required for the PMUs the event is to be installed on is allocated by allocate_buffers() and alloc_sampling_buffer(). This done outside of the mutex protection. Without mutex protection two or more concurrent invocations of perf_event_init() may run in parallel. This can lead to allocation of Sample Data Blocks (SDBs) multiple times for the same PMU. Prevent this and protect memory allocation of SDBs by mutex.
Quoted source text, attributed separately from HOL analysis.
Answer in brief
CVE-2024-56706 records a Unknown severity vulnerability in s390/cpum_sf: Fix and protect memory allocation of SDBs with mutex. 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.
A CVSS score is not reported in the current record. 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 | >=8a6fe8f21ec4f049a7b1fe120ad50a5065a9c7a8 <4b3bdfa89635db6a53e02955548bd07bebcae233 || >=8a6fe8f21ec4f049a7b1fe120ad50a5065a9c7a8 <f55bd479d8663a4a4e403b3d308d3d1aa33d92df | 4b3bdfa89635db6a53e02955548bd07bebcae233, f55bd479d8663a4a4e403b3d308d3d1aa33d92df |
| Linux/Linuxgeneric | 6.12 | Not reported |
Published upstream
Dec 28, 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: s390/cpum_sf: Fix and protect memory allocation of SDBs with mutex Reservation of the PMU hardware is done at first event creation and is protected by a pair of mutex_lock() and mutex_unlock(). After reservation of the PMU hardware the memory required for the PMUs the event is to be installed on is allocated by allocate_buffers() and alloc_sampling_buffer(). This done outside of the mutex protection. Without mutex protection two or more concurrent invocations of perf_event_init() may run in parallel. This can lead to allocation of Sample Data Blocks (SDBs) multiple times for the same PMU. Prevent this and protect memory allocation of SDBs by mutex.
Quoted source text, attributed separately from HOL analysis.