CVE-2026-64018

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

State: Published
Severity: 9.3 Critical
Published: Jul 19, 2026
Updated: Oct 19, 2026
Reserved: Jul 19, 2026

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.

Scores

CVSS	Score	Vector	Source
3.1	9.3 Critical	CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H	Linux

Weaknesses

CWE-125 Out-of-bounds Read

Affected Products

Product	Versions
LinuxLinux	ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f to before 5ddc715324badd7f2641bc177db1d027b402adaeAffected ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f to before ff1d5af207bcea857d45fe81505f1bc4b29eaef0Affected ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f to before 01f7f893d5e1baae995beeb86cd0f3e6bb2a3b01Affected ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f to before 763a372d344fb12fae566d36ddb46e92454ad58cAffected ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f to before fa627a5eaa83fc0261f44ef3769693b886ca6e27Affected ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f to before 355e9f2b2a7887ca38100127989af3e422ba71d0Affected ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f to before b809d0409991b75a6cff846a5ac27c3062953f84Affected
LinuxLinux	5.13Affected before 5.13Not affected 5.15.209 through 5.15.Not affected 6.1.175 through 6.1.Not affected 6.6.142 through 6.6.Not affected 6.12.92 through 6.12.Not affected 6.18.34 through 6.18.Not affected 7.0.11 through 7.0.Not affected 7.1 and laterNot affected

Product

Versions

LinuxLinux

ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f to before 5ddc715324badd7f2641bc177db1d027b402adaeAffected
ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f to before ff1d5af207bcea857d45fe81505f1bc4b29eaef0Affected
ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f to before 01f7f893d5e1baae995beeb86cd0f3e6bb2a3b01Affected
ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f to before 763a372d344fb12fae566d36ddb46e92454ad58cAffected
ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f to before fa627a5eaa83fc0261f44ef3769693b886ca6e27Affected
ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f to before 355e9f2b2a7887ca38100127989af3e422ba71d0Affected
ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f to before b809d0409991b75a6cff846a5ac27c3062953f84Affected

LinuxLinux

5.13Affected
before 5.13Not affected
5.15.209 through 5.15.*Not affected
6.1.175 through 6.1.*Not affected
6.6.142 through 6.6.*Not affected
6.12.92 through 6.12.*Not affected
6.18.34 through 6.18.*Not affected
7.0.11 through 7.0.*Not affected
7.1 and laterNot affected

References

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