CVE-2026-98177drm/amdkfd: Avoid integer underflow in EOP ring size calculation.
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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)
- CVSS
- Not yet scored
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Received
- Record last updated
- Oct 19, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from d696d536f0a97ac779d6176107ac4e96d0a2f8b9 before 287a34c4d712e0bdb67751e21316d9c8d75a528a; from d696d536f0a97ac779d6176107ac4e96d0a2f8b9 before 8ee521b8b189799e361d4233c5180ba56656d4d4 | CNA record |
References
- https://git.kernel.org/stable/c/287a34c4d712e0bdb67751e21316d9c8d75a528a
- https://git.kernel.org/stable/c/8ee521b8b189799e361d4233c5180ba56656d4d4
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.