CVE-2026-64018

Summary

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.

Affected Software

VendorProductVersion RangeStatus
LinuxLinuxca9c54d2d6a5ab2430c4eda364c77125d62e5e0f < 5ddc715324badd7f2641bc177db1d027b402adaeaffected
LinuxLinuxca9c54d2d6a5ab2430c4eda364c77125d62e5e0f < ff1d5af207bcea857d45fe81505f1bc4b29eaef0affected
LinuxLinuxca9c54d2d6a5ab2430c4eda364c77125d62e5e0f < 01f7f893d5e1baae995beeb86cd0f3e6bb2a3b01affected
LinuxLinuxca9c54d2d6a5ab2430c4eda364c77125d62e5e0f < 763a372d344fb12fae566d36ddb46e92454ad58caffected
LinuxLinuxca9c54d2d6a5ab2430c4eda364c77125d62e5e0f < fa627a5eaa83fc0261f44ef3769693b886ca6e27affected
LinuxLinuxca9c54d2d6a5ab2430c4eda364c77125d62e5e0f < 355e9f2b2a7887ca38100127989af3e422ba71d0affected
LinuxLinuxca9c54d2d6a5ab2430c4eda364c77125d62e5e0f < b809d0409991b75a6cff846a5ac27c3062953f84affected
LinuxLinux5.13affected
LinuxLinux0 < 5.13unaffected
LinuxLinux5.15.209 <= 5.15.*unaffected
LinuxLinux6.1.175 <= 6.1.*unaffected
LinuxLinux6.6.142 <= 6.6.*unaffected
LinuxLinux6.12.92 <= 6.12.*unaffected
LinuxLinux6.18.34 <= 6.18.*unaffected
LinuxLinux7.0.11 <= 7.0.*unaffected
LinuxLinux7.1 <= *unaffected

Weaknesses

References