net: mana: validate rx_req_idx to prevent out-of-bounds array access

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.

Timeline

1. Jul 19, 2026, 3:39 PM UTCCVE published
2. Oct 16, 2026, 3:35 PM UTCCISA SSVC assessment

   Exploitation: none · Automatable: no · Technical impact: total

3. Oct 19, 2026, 8:28 PM UTCRecord last updated

Affected versions

• Linux Linux

  From ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f · fixed in 5ddc715324badd7f2641bc177db1d027b402adae; From ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f · fixed in ff1d5af207bcea857d45fe81505f1bc4b29eaef0; From ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f · fixed in 01f7f893d5e1baae995beeb86cd0f3e6bb2a3b01; From ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f · fixed in 763a372d344fb12fae566d36ddb46e92454ad58c; From ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f · fixed in fa627a5eaa83fc0261f44ef3769693b886ca6e27; From ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f · fixed in 355e9f2b2a7887ca38100127989af3e422ba71d0; From ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f · fixed in b809d0409991b75a6cff846a5ac27c3062953f84

• Linux Linux

  5.13

• KernelLinux

  From 5.13.0 · fixed in 5.15.209; From 5.16.0 · fixed in 6.1.175; From 6.2.0 · fixed in 6.6.142; From 6.7.0 · fixed in 6.12.92; From 6.13.0 · fixed in 6.18.34; From 6.19.0 · fixed in 7.0.11

References 7