Vulnerability 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 Score
CRITICAL
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
FAQ
What is CVE-2026-64018?
CVE-2026-64018 is a vulnerability with a CVSS score of 9.3 (CRITICAL). 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 sg...
How severe is CVE-2026-64018?
CVE-2026-64018 has been rated CRITICAL with a CVSS base score of 9.3/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2026-64018?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.