by Kastro CVE-2026-64018
Linux Linux — net: mana: validate rx_req_idx to prevent out-of-bounds array access
Description · from the CVE record
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
ProductAffectedFixed inSource
Linuxca9c54d2d6a5ab2430c4eda364c77125d62e5e0f – < 5ddc715324badd7f2641bc177db1d027b402adae5ddc715324badd7f2641bc177db1d027b402adaeCNA
Linuxca9c54d2d6a5ab2430c4eda364c77125d62e5e0f – < ff1d5af207bcea857d45fe81505f1bc4b29eaef0ff1d5af207bcea857d45fe81505f1bc4b29eaef0CNA
Linuxca9c54d2d6a5ab2430c4eda364c77125d62e5e0f – < 01f7f893d5e1baae995beeb86cd0f3e6bb2a3b0101f7f893d5e1baae995beeb86cd0f3e6bb2a3b01CNA
Linuxca9c54d2d6a5ab2430c4eda364c77125d62e5e0f – < 763a372d344fb12fae566d36ddb46e92454ad58c763a372d344fb12fae566d36ddb46e92454ad58cCNA
Linuxca9c54d2d6a5ab2430c4eda364c77125d62e5e0f – < fa627a5eaa83fc0261f44ef3769693b886ca6e27fa627a5eaa83fc0261f44ef3769693b886ca6e27CNA
Linuxca9c54d2d6a5ab2430c4eda364c77125d62e5e0f – < 355e9f2b2a7887ca38100127989af3e422ba71d0355e9f2b2a7887ca38100127989af3e422ba71d0CNA
Linuxca9c54d2d6a5ab2430c4eda364c77125d62e5e0f – < b809d0409991b75a6cff846a5ac27c3062953f84b809d0409991b75a6cff846a5ac27c3062953f84CNA
Linux5.135.15.209CNA
Scores by source
Linux (CNA)9.3CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
CISA ADPSSVCExploitation: none · Automatable: no · Technical impact: total