CVE-2026-98177
drm/amdkfd: Avoid integer underflow in EOP ring size calculation.
No known exploitation. EPSS puts it in the 4th percentile. Fixed versions are out.
What to do
Find your product and version, then upgrade to the build on the right.
- LinuxAffected: ≥ d696d536f0a97ac779d6176107ac4e96d0a2f8b9, < 287a34c4d712e0bdb67751e21316d9c8d75a528aUpgrade to: 287a34c4d712e0bdb67751e21316d9c8d75a528aAffected: ≥ d696d536f0a97ac779d6176107ac4e96d0a2f8b9, < 8ee521b8b189799e361d4233c5180ba56656d4d4Upgrade to: 8ee521b8b189799e361d4233c5180ba56656d4d4Stated 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 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)
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 4th 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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