In the Linux kernel, the following vulnerability has been resolved:
drm/amdkfd: fix 32-bit overflow in CWSR total size calculation
totalcwsrsize was computed in 32-bit before being used as a BO/SVM allocation size. With large ctxsaverestoreareasize and debugmemorysize multiplied by the XCC count, the product can wrap, yielding an undersized CWSR save area that firmware later overruns.
Promote totalcwsrsize to u64 and use checkaddoverflow()/ checkmuloverflow() in both kfdqueueacquirebuffers() and kfdqueuereleasebuffers().
(cherry picked from commit 319f7e13423ae3f486b9aea82f9ad2d6af0ee608)
{
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/68xxx/CVE-2026-68257.json",
"cna_assigner": "Linux"
}