CVE-2026-53015erofs: unify lcn as u64 for 32-bit platforms
- 5.5MediumCVSS base score
- 0.12%Exploitation in 30 daysEPSS · top 98% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
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
Timeline
ID reserved
By Linux
- 15 days later
· 15 days later
Published
- 4 months later
· 4 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 3.1 | Medium5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.12% · top 98% of all CVEs (13 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.5.
Affected products
- affected 152a333a589560bee002e4c96761f1b560a5793c – < d142250132454bf86cba87018fb2d29c482dacd6
- affected 152a333a589560bee002e4c96761f1b560a5793c – < 18f9f3ddbf2ed6d245a4c6f91c51f7248f8a982c
- affected 152a333a589560bee002e4c96761f1b560a5793c – < 4fc9b12e43a3f19a01a8fb61f7961be79de20253
- affected 152a333a589560bee002e4c96761f1b560a5793c – < 858e4d98a86adf34584767388deb6c9b217f70c5
- affected 152a333a589560bee002e4c96761f1b560a5793c – < 582b0bf201157632cb5474c885989a6ebda46521
- affected 152a333a589560bee002e4c96761f1b560a5793c – < 2d8c7edcb661812249469f4a5b62e9339118846f
- affected 5.3
- unaffected < 5.3
- unaffected 6.1.191 – ≤ 6.1.*
- unaffected 6.6.160 – ≤ 6.6.*
- unaffected 6.12.91 – ≤ 6.12.*
- unaffected 6.18.33 – ≤ 6.18.*
- unaffected 7.0.10 – ≤ 7.0.*
- unaffected 7.1 – ≤ *
References
References6
- https://git.kernel.org/stable/c/d142250132454bf86cba87018fb2d29c482dacd6 (opens in a new tab)
- https://git.kernel.org/stable/c/18f9f3ddbf2ed6d245a4c6f91c51f7248f8a982c (opens in a new tab)
- https://git.kernel.org/stable/c/4fc9b12e43a3f19a01a8fb61f7961be79de20253 (opens in a new tab)
- https://git.kernel.org/stable/c/858e4d98a86adf34584767388deb6c9b217f70c5 (opens in a new tab)
- https://git.kernel.org/stable/c/582b0bf201157632cb5474c885989a6ebda46521 (opens in a new tab)
- https://git.kernel.org/stable/c/2d8c7edcb661812249469f4a5b62e9339118846f (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-38883 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-53015)Record last updated .