Linux kernel mana driver OOB array access via rx_req_idx in SEV-SNP/TDX
CVE-2026-64018 Published on July 19, 2026
net: mana: validate rx_req_idx to prevent out-of-bounds array access
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.
Products Associated with CVE-2026-64018
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Affected Versions
Linux:- Version ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f and below 5ddc715324badd7f2641bc177db1d027b402adae is affected.
- Version ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f and below ff1d5af207bcea857d45fe81505f1bc4b29eaef0 is affected.
- Version ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f and below 01f7f893d5e1baae995beeb86cd0f3e6bb2a3b01 is affected.
- Version ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f and below 763a372d344fb12fae566d36ddb46e92454ad58c is affected.
- Version ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f and below fa627a5eaa83fc0261f44ef3769693b886ca6e27 is affected.
- Version ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f and below 355e9f2b2a7887ca38100127989af3e422ba71d0 is affected.
- Version ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f and below b809d0409991b75a6cff846a5ac27c3062953f84 is affected.
- Version 5.13 is affected.
- Before 5.13 is unaffected.
- Version 5.15.209, <= 5.15.* is unaffected.
- Version 6.1.175, <= 6.1.* is unaffected.
- Version 6.6.142, <= 6.6.* is unaffected.
- Version 6.12.92, <= 6.12.* is unaffected.
- Version 6.18.34, <= 6.18.* is unaffected.
- Version 7.0.11, <= 7.0.* is unaffected.
- Version 7.1, <= * is unaffected.