CVE-2026-68257High· 7.8▾ TwilightIn the Linux kernel, the following vulnerability has been resolved: drm/amdkfd: fix 32-bit overflow in CWSR total size calculation total_cwsr_size was computed in 32-bit before being used as a BO/SVM allocation size. With large ctx_sav…
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 42.9 · likelihood 0 · exploitation 0
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Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake. The CVSS score shown above comes from the assigning CNA record, not NVD.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CVEORG
Last analysed / modified upstream
0.1%
In the Linux kernel, the following vulnerability has been resolved:
drm/amdkfd: fix 32-bit overflow in CWSR total size calculation
total_cwsr_size was computed in 32-bit before being used as a BO/SVM allocation size. With large ctx_save_restore_area_size and debug_memory_size multiplied by the XCC count, the product can wrap, yielding an undersized CWSR save area that firmware later overruns.
Promote total_cwsr_size to u64 and use check_add_overflow()/ check_mul_overflow() in both kfd_queue_acquire_buffers() and kfd_queue_release_buffers().
(cherry picked from commit 319f7e13423ae3f486b9aea82f9ad2d6af0ee608)
Linux >= 325aa07165394b8e866ffe9ec1d4c99d9195b2f2 < b88ffe6593607364a8c06a48c6f29e55437cdf8eLinux >= d15deafab5d722afb9e2f83c5edcdef9d9d98bd1 < abce3276c57e36c955627307469b9f009057a467Linux >= d15deafab5d722afb9e2f83c5edcdef9d9d98bd1 < 865532d54eb57b660b1cb1b0e1755776ce21b849Linux >= d15deafab5d722afb9e2f83c5edcdef9d9d98bd1 < 2b0386d4293920e690c0e017708f999b93cc729bLinux 63600103d2ac5c09fdeec5b931b396e4e0efd5d8Linux >= 6.12.59 < 6.12.101Linux >= 6.17.9 < 6.18Linux 6.18Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Connected by shared product, vendor, weakness, or advisory.
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