CVE-2026-98177
- Source
- https://cve.org/CVERecord?id=CVE-2026-98177
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-98177.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2026-98177
- Downstream
- Published
- 2026-10-06T08:44:20Z
- Modified
- 2026-10-08T02:52:50Z
- Summary
- drm/amdkfd: Avoid integer underflow in EOP ring size calculation.
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
drm/amdkfd: Avoid integer underflow in EOP ring size calculation.
The low 6 bits of cp_hqd_eop_control store the base-2 logarithm of the EOP ring size. This was calculated as
order_base_2(q->eop_ring_buffer_size / 4) - 1
But order_base_2 can in theory return 0, so this could underflow (although in practice the ring buffer size cannot be less than 4096).
Change this to
order_base_2(q->eop_ring_buffer_size / 8)
using properties of logarithms.
Also add to the above comment to make the mathematics more clear.
(cherry picked from commit f0f43fcf8b2b3a924cad9444340921c96ed5f634)
- Database specific
{ "cna_assigner": "Linux", "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98177.json" }- References
-
- https://git.kernel.org/stable/c/287a34c4d712e0bdb67751e21316d9c8d75a528a
- https://git.kernel.org/stable/c/8ee521b8b189799e361d4233c5180ba56656d4d4
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98177.json
- https://nvd.nist.gov/vuln/detail/CVE-2026-98177
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git