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
{
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53015.json",
"cna_assigner": "Linux"
}