CVE-2026-64018 (GCVE-0-2026-64018)

Vulnerability from cvelistv5 – Published: 2026-07-19 15:39 – Updated: 2026-07-20 13:42
VLAI
Title
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.
Severity
9.3 (Critical)
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f , < 5ddc715324badd7f2641bc177db1d027b402adae (git)
Affected: ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f , < ff1d5af207bcea857d45fe81505f1bc4b29eaef0 (git)
Affected: ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f , < 01f7f893d5e1baae995beeb86cd0f3e6bb2a3b01 (git)
Affected: ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f , < 763a372d344fb12fae566d36ddb46e92454ad58c (git)
Affected: ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f , < fa627a5eaa83fc0261f44ef3769693b886ca6e27 (git)
Affected: ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f , < 355e9f2b2a7887ca38100127989af3e422ba71d0 (git)
Affected: ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f , < b809d0409991b75a6cff846a5ac27c3062953f84 (git)
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Linux Linux Affected: 5.13
Unaffected: 0 , < 5.13 (semver)
Unaffected: 5.15.209 , ≤ 5.15.* (semver)
Unaffected: 6.1.175 , ≤ 6.1.* (semver)
Unaffected: 6.6.142 , ≤ 6.6.* (semver)
Unaffected: 6.12.92 , ≤ 6.12.* (semver)
Unaffected: 6.18.34 , ≤ 6.18.* (semver)
Unaffected: 7.0.11 , ≤ 7.0.* (semver)
Unaffected: 7.1 , ≤ * (original_commit_for_fix)
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  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.