Answer in brief
CVE-2026-89584 records a High severity (CVSS 7.8) vulnerability in block: validate user space vectors during extraction. 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 7.8. 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 | >=5ff3f74e145adc79b49668adb8de276446acf6be <d44a97a3b1c00cc571245124e23e5ceb0a0225a0 || >=5ff3f74e145adc79b49668adb8de276446acf6be <14b007e178811db72fbb1ebb3535160db6ec1e6a | d44a97a3b1c00cc571245124e23e5ceb0a0225a0, 14b007e178811db72fbb1ebb3535160db6ec1e6a |
| Linux/Linuxgeneric | 6.18 | Not reported |
Published upstream
Sep 11, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 19, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Sep 11, 2026
In the Linux kernel, the following vulnerability has been resolved: block: validate user space vectors during extraction The bio-based drivers don't necessarily check the alignment split, and stacking block drivers don't always handle a misalignment detected after submitting the bio. Validate user vectors against the device's dma_alignment as the bio is built from the iov_iter, rejecting misaligned early with -EINVAL.
Quoted source text, attributed separately from HOL analysis.