Answer in brief
CVE-2026-53015 records a Medium severity (CVSS 5.5) vulnerability in erofs: unify lcn as u64 for 32-bit platforms. 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.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=152a333a589560bee002e4c96761f1b560a5793c <18f9f3ddbf2ed6d245a4c6f91c51f7248f8a982c || >=152a333a589560bee002e4c96761f1b560a5793c <4fc9b12e43a3f19a01a8fb61f7961be79de20253 || >=152a333a589560bee002e4c96761f1b560a5793c <858e4d98a86adf34584767388deb6c9b217f70c5 || >=152a333a589560bee002e4c96761f1b560a5793c <582b0bf201157632cb5474c885989a6ebda46521 || >=152a333a589560bee002e4c96761f1b560a5793c <2d8c7edcb661812249469f4a5b62e9339118846f | 18f9f3ddbf2ed6d245a4c6f91c51f7248f8a982c, 4fc9b12e43a3f19a01a8fb61f7961be79de20253, 858e4d98a86adf34584767388deb6c9b217f70c5, 582b0bf201157632cb5474c885989a6ebda46521, 2d8c7edcb661812249469f4a5b62e9339118846f |
| Linux/Linuxgeneric | 5.3 | Not reported |
Published upstream
Jun 24, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 21, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Jun 24, 2026
In the Linux kernel, the following vulnerability has been resolved: erofs: unify lcn as u64 for 32-bit platforms As sashiko reported [1], `lcn` was typed as `unsigned long` (or `unsigned int` sometimes), which is only 32 bits wide on 32-bit platforms, which causes `(lcn << lclusterbits)` to be truncated at 4 GiB. In order to consolidate the logic, just use `u64` consistently around the codebase. [1] https://sashiko.dev/r/20260420034612.1899973-1-hsiangkao%40linux.alibaba.com
Quoted source text, attributed separately from HOL analysis.