CVE-2026-53015erofs: unify lcn as u64 for 32-bit platforms
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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
- CVSS
- 5.5 MEDIUM (v3.1, NVD)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Modified
- Record last updated
- Oct 21, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | 152a333a589560bee002e4c96761f1b560a5793c builds before 18f9f3ddbf2ed6d245a4c6f91c51f7248f8a982c; 152a333a589560bee002e4c96761f1b560a5793c builds before 4fc9b12e43a3f19a01a8fb61f7961be79de20253; from 152a333a589560bee002e4c96761f1b560a5793c before 858e4d98a86adf34584767388deb6c9b217f70c5; from 152a333a589560bee002e4c96761f1b560a5793c before 582b0bf201157632cb5474c885989a6ebda46521; 152a333a589560bee002e4c96761f1b560a5793c builds before 2d8c7edcb661812249469f4a5b62e9339118846f | CNA record |
linux linux_kernel linux:linux_kernel | from 5.3 before 6.12.91; from 6.13 before 6.18.33; from 6.19 before 7.0.10 | NVD |
References
- https://git.kernel.org/stable/c/18f9f3ddbf2ed6d245a4c6f91c51f7248f8a982c
- https://git.kernel.org/stable/c/4fc9b12e43a3f19a01a8fb61f7961be79de20253patch
- https://git.kernel.org/stable/c/858e4d98a86adf34584767388deb6c9b217f70c5patch
- https://git.kernel.org/stable/c/582b0bf201157632cb5474c885989a6ebda46521patch
- https://git.kernel.org/stable/c/2d8c7edcb661812249469f4a5b62e9339118846fpatch
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.