CVE-2026-98176
drm/amdkfd: Avoid integer underflow with ffs in EOP ring size calc
No known exploitation. EPSS puts it in the 5th percentile. Fixed versions are out.
What to do
Find your product and version, then upgrade to the build on the right.
- LinuxAffected: ≥ 14328aa58ce523a59996c5a82681c43ec048cc33, < 82e1b8299c6da02ce02185c208d2fdf7572b5ea1Upgrade to: 82e1b8299c6da02ce02185c208d2fdf7572b5ea1Affected: ≥ 14328aa58ce523a59996c5a82681c43ec048cc33, < c883d0a132d430ef7ebb23fd94323be94d0fbdb8Upgrade to: c883d0a132d430ef7ebb23fd94323be94d0fbdb8Stated by: CVE record
Versions as the sources state them. Full version matrix after sign-in
What it is
From the CVE record
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)
In plain language
No plain-language summary for this CVE yet.
Exploitation
Where each signal puts this CVE on the scale from published to confirmed exploited.
- CISA KEV
Not in the catalog. CISA has not confirmed exploitation.
- Public exploits
No public exploit or proof of concept found in the sources we track.
- EPSS
0.2% chance of exploitation activity in the next 30 days, which ranks it in the 5th percentile of scored CVEs.
Exploit Prediction Scoring System, FIRST.org. A probability, not a confirmation.
Lifecycle
3 events over 1 day, from the signal feeds we watch.
- Record updated
- Publishedrecord updated
Affected products
Sources
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