CVE-2026-98176
- Source
- https://cve.org/CVERecord?id=CVE-2026-98176
- Import Source
- https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-98176.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/CVE-2026-98176
- Downstream
- Related
- Published
- 2026-10-06T08:44:20Z
- Modified
- 2026-10-20T02:33:19Z
- Summary
- drm/amdkfd: Avoid integer underflow with ffs in EOP ring size calc
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
drm/amdkfd: Avoid integer underflow with ffs in EOP ring size calc
The low 6 bits of cp_hqd_eop_control store the base-2 logarithm of the EOP ring size. This was calculated as
ffs(q->eop_ring_buffer_size / sizeof(unsigned int)) - 1 - 1
But ffs can in theory return 1 or 0, so this could underflow (although in practice the ring buffer size cannot be less than 4096).
Change this to
ffs(q->eop_ring_buffer_size / sizeof(unsigned int) / 4)
using properties of logarithms.
(cherry picked from commit 4f18c56630383c14bfc6b2d65f88f2f895d2121a)
- Database specific
{ "cna_assigner": "Linux", "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98176.json" }- References
-
- https://git.kernel.org/stable/c/82e1b8299c6da02ce02185c208d2fdf7572b5ea1
- https://git.kernel.org/stable/c/c883d0a132d430ef7ebb23fd94323be94d0fbdb8
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98176.json
- https://nvd.nist.gov/vuln/detail/CVE-2026-98176
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git