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.

No CVSS v4.0

Attack Vector Local

Attack Complexity Low

Privileges Required None

Scope Changed

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00172.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
Linux Linux unaffected
Version Status Constraints
ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f affected < 5ddc715324badd7f2641bc177db1d027b402adae
ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f affected < ff1d5af207bcea857d45fe81505f1bc4b29eaef0
ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f affected < 01f7f893d5e1baae995beeb86cd0f3e6bb2a3b01
ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f affected < 763a372d344fb12fae566d36ddb46e92454ad58c
ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f affected < fa627a5eaa83fc0261f44ef3769693b886ca6e27
ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f affected < 355e9f2b2a7887ca38100127989af3e422ba71d0
ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f affected < b809d0409991b75a6cff846a5ac27c3062953f84
Linux Linux affected
Version Status Constraints
5.13 affected —
0 unaffected < 5.13
5.15.209 unaffected ≤ 5.15.*
6.1.175 unaffected ≤ 6.1.*
6.6.142 unaffected ≤ 6.6.*
6.12.92 unaffected ≤ 6.12.*
6.18.34 unaffected ≤ 6.18.*
7.0.11 unaffected ≤ 7.0.*
7.1 unaffected ≤ *

No data.

No data.

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Advisories
Source ID Title
Ubuntu USN Ubuntu USN USN-8575-1 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-8576-1 Linux kernel (NVIDIA Tegra) vulnerabilities
Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://git.kernel.org/stable/c/01f7f893d5e1baae995beeb86cd0f3e6bb2a3b01 cve-icon
https://git.kernel.org/stable/c/355e9f2b2a7887ca38100127989af3e422ba71d0 cve-icon
https://git.kernel.org/stable/c/5ddc715324badd7f2641bc177db1d027b402adae cve-icon
https://git.kernel.org/stable/c/763a372d344fb12fae566d36ddb46e92454ad58c cve-icon
https://git.kernel.org/stable/c/b809d0409991b75a6cff846a5ac27c3062953f84 cve-icon
https://git.kernel.org/stable/c/fa627a5eaa83fc0261f44ef3769693b886ca6e27 cve-icon
https://git.kernel.org/stable/c/ff1d5af207bcea857d45fe81505f1bc4b29eaef0 cve-icon
History

Mon, 20 Jul 2026 14:45:00 +0000

Type Values Removed Values Added
Metrics cvssV3_1

{'score': 9.3, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H'}

Sun, 19 Jul 2026 15:45:00 +0000

Type Values Removed Values Added
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.
Title net: mana: validate rx_req_idx to prevent out-of-bounds array access
First Time appeared Linux
Linux linux Kernel
CPEs cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Vendors & Products Linux
Linux linux Kernel
References

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: Linux

Published:

Updated: 2026-07-20T13:42:26.010Z

Reserved: 2026-07-19T07:54:57.027Z

Link: CVE-2026-64018

cve-icon Vulnrichment

No data.

cve-icon NVD

No data.

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-07-21T07:30:03Z

Weaknesses

No weakness.