Answer in brief
CVE-2026-80758 records a Unknown severity vulnerability in futex: Avoid private hash use-after-free on final put. 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 | >=bd54df5ea7cadac520e346d5f0fe5d58e635b6ba <dba60d26e9dda3e157ad6b0934d4232f6c6904ee || >=bd54df5ea7cadac520e346d5f0fe5d58e635b6ba <12cd315a7b6a7d7db3f69d98bfe3909275e9451d || >=bd54df5ea7cadac520e346d5f0fe5d58e635b6ba <25408c62ed4ebcd491d0e9e4b4a5b512547512e4 || >=bd54df5ea7cadac520e346d5f0fe5d58e635b6ba <1c7efabfbaf796f11000a46094a69955a01ec6cc | dba60d26e9dda3e157ad6b0934d4232f6c6904ee, 12cd315a7b6a7d7db3f69d98bfe3909275e9451d, 25408c62ed4ebcd491d0e9e4b4a5b512547512e4, 1c7efabfbaf796f11000a46094a69955a01ec6cc |
| Linux/Linuxgeneric | 6.16 | Not reported |
Published upstream
Sep 4, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Sep 4, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Sep 4, 2026
In the Linux kernel, the following vulnerability has been resolved: futex: Avoid private hash use-after-free on final put futex_private_hash_put() drops the reference to fph before evaluating fph->mm for wake_up_var(). futex_ref_put() enables preemption again before returning. If that put drops the final reference and the task is preempted, another task can pivot to the replacement hash and free the old hash after an RCU grace period. The first task then reads fph->mm from the freed allocation when it resumes. KASAN reports a slab-use-after-free in futex_private_hash_put(), with the read at offset 24 in a freed kmalloc-512 allocation. The allocation and free stacks point to futex_hash_allocate() and the RCU free path, respectively. Load the mm pointer while the fph reference is still held and pass the saved value to wake_up_var(). wake_up_var() uses the pointer as a waitqueue key and does not dereference the mm through it.
Quoted source text, attributed separately from HOL analysis.