CVE-2026-64018
In the Linux kernel, the following vulnerability has been resolved: net: mana: validate rx_req_idx to prevent out-of-bounds array access In mana_hwc_rx_event_handler(), rx_req_idx is derived from sge->address in DMA-coherent memory.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.14%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
In the Linux kernel, the following vulnerability has been resolved: net: mana: validate rx_req_idx to prevent out-of-bounds array access In mana_hwc_rx_event_handler(), rx_req_idx is derived from sge->address in DMA-coherent memory. In Confidential VMs (SEV-SNP/TDX), this memory is shared unencrypted and HW can modify WQE contents at any time. No bounds check exists on rx_req_idx, which can lead to an out-of-bounds access into reqs[]. Add bounds check on rx_req_idx in mana_hwc_rx_event_handler() before using it to index the reqs[] array.
- CVSS 3.1
- 9.3 CRITICALCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
- EPSS
- 0.14% probability · 4th percentile
- CISA KEV
- Not listed
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/01f7f893d5e1baae995beeb86cd0f3e6bb2a3b01
- https://git.kernel.org/stable/c/355e9f2b2a7887ca38100127989af3e422ba71d0
- https://git.kernel.org/stable/c/5ddc715324badd7f2641bc177db1d027b402adae
- https://git.kernel.org/stable/c/763a372d344fb12fae566d36ddb46e92454ad58c
- https://git.kernel.org/stable/c/b809d0409991b75a6cff846a5ac27c3062953f84
- https://git.kernel.org/stable/c/fa627a5eaa83fc0261f44ef3769693b886ca6e27
- https://git.kernel.org/stable/c/ff1d5af207bcea857d45fe81505f1bc4b29eaef0
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.