CVE-2026-68257
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Summary
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)
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Linux | Linux | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < b88ffe6593607364a8c06a48c6f29e55437cdf8e | affected |
| Linux | Linux | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < abce3276c57e36c955627307469b9f009057a467 | affected |
| Linux | Linux | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 865532d54eb57b660b1cb1b0e1755776ce21b849 | affected |
| Linux | Linux | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 2b0386d4293920e690c0e017708f999b93cc729b | affected |
| Linux | Linux | 0 < 6.12.101 | affected |
| Linux | Linux | 0 < 6.18.42 | affected |
| Linux | Linux | 0 < 7.1.6 | affected |
| Linux | Linux | 6.12.101 <= 6.12.* | unaffected |
| Linux | Linux | 6.18.42 <= 6.18.* | unaffected |
| Linux | Linux | 7.1.6 <= 7.1.* | unaffected |
| Linux | Linux | 7.2-rc4 <= * | unaffected |
Weaknesses
References
- https://git.kernel.org/stable/c/b88ffe6593607364a8c06a48c6f29e55437cdf8e
- https://git.kernel.org/stable/c/abce3276c57e36c955627307469b9f009057a467
- https://git.kernel.org/stable/c/865532d54eb57b660b1cb1b0e1755776ce21b849
- https://git.kernel.org/stable/c/2b0386d4293920e690c0e017708f999b93cc729b
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