Answer in brief
CVE-2026-64258 records a Medium severity (CVSS 5.5) vulnerability in fuse-uring: remove request-less entries from ent_w_req_queue to fix NULL deref. 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 5.5. 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.
| Product | Affected versions | Fixed versions |
|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | Not reported | Not reported |
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=4fea593e625cd50d4d11be227007849b12f17bfb <0b466cf1b96e191b06b496c4de79da15315c3a9a || >=4fea593e625cd50d4d11be227007849b12f17bfb <0a7f33010c0e4cd92937e088a54350381fd0fbf2 || >=4fea593e625cd50d4d11be227007849b12f17bfb <1c57a69be962d459c5e705f5cb4355b841b3461c | 0b466cf1b96e191b06b496c4de79da15315c3a9a, 0a7f33010c0e4cd92937e088a54350381fd0fbf2, 1c57a69be962d459c5e705f5cb4355b841b3461c |
| Linux/Linuxgeneric | 6.16 | Not reported |
Published upstream
Jul 25, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 17, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 12, 2026
In the Linux kernel, the following vulnerability has been resolved: fuse-uring: remove request-less entries from ent_w_req_queue to fix NULL deref If a copy into the userspace ring buffer fails, a request will be terminated and fuse_uring_req_end() will set ent->fuse_req to NULL but it will leave the entry on ent_w_req_queue in FRRS_FUSE_REQ state. This can lead to a NULL deref if the request expiration logic scans ent_w_req_queue in the window before the entry is moved off it. Fix this by taking the entry off ent_w_req_queue and changing its state from FRRS_FUSE_REQ to FRRS_INVALID before terminating the request.
Quoted source text, attributed separately from HOL analysis.
Answer in brief
CVE-2026-64258 records a Medium severity (CVSS 5.5) vulnerability in fuse-uring: remove request-less entries from ent_w_req_queue to fix NULL deref. 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 5.5. 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.
| Product | Affected versions | Fixed versions |
|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | Not reported | Not reported |
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=4fea593e625cd50d4d11be227007849b12f17bfb <0b466cf1b96e191b06b496c4de79da15315c3a9a || >=4fea593e625cd50d4d11be227007849b12f17bfb <0a7f33010c0e4cd92937e088a54350381fd0fbf2 || >=4fea593e625cd50d4d11be227007849b12f17bfb <1c57a69be962d459c5e705f5cb4355b841b3461c | 0b466cf1b96e191b06b496c4de79da15315c3a9a, 0a7f33010c0e4cd92937e088a54350381fd0fbf2, 1c57a69be962d459c5e705f5cb4355b841b3461c |
| Linux/Linuxgeneric | 6.16 | Not reported |
Published upstream
Jul 25, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 17, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 12, 2026
In the Linux kernel, the following vulnerability has been resolved: fuse-uring: remove request-less entries from ent_w_req_queue to fix NULL deref If a copy into the userspace ring buffer fails, a request will be terminated and fuse_uring_req_end() will set ent->fuse_req to NULL but it will leave the entry on ent_w_req_queue in FRRS_FUSE_REQ state. This can lead to a NULL deref if the request expiration logic scans ent_w_req_queue in the window before the entry is moved off it. Fix this by taking the entry off ent_w_req_queue and changing its state from FRRS_FUSE_REQ to FRRS_INVALID before terminating the request.
Quoted source text, attributed separately from HOL analysis.