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CVE-2025-40266 (GCVE-0-2025-40266)

Vulnerability from cvelistv5 – Published: 2025-12-04 16:08 – Updated: 2026-08-05 12:09
VLAI
Title
KVM: arm64: Check the untrusted offset in FF-A memory share
Summary
In the Linux kernel, the following vulnerability has been resolved: KVM: arm64: Check the untrusted offset in FF-A memory share Verify the offset to prevent OOB access in the hypervisor FF-A buffer in case an untrusted large enough value [U32_MAX - sizeof(struct ffa_composite_mem_region) + 1, U32_MAX] is set from the host kernel.
Severity
8.2 (High)
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-16 19:59 UTC
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 6211753fdfd05af9e08f54c8d0ba3ee516034878 , < fc3139d9f4c1fe1c7d5f25f99676bd8e9c6a1041 (git)
Affected: 6211753fdfd05af9e08f54c8d0ba3ee516034878 , < bc1909ef38788f2ee3d8011d70bf029948433051 (git)
Affected: 6211753fdfd05af9e08f54c8d0ba3ee516034878 , < f9f1aed6c8a3427900da3121e1868124854569c3 (git)
Affected: 6211753fdfd05af9e08f54c8d0ba3ee516034878 , < 103e17aac09cdd358133f9e00998b75d6c1f1518 (git)
guessed Create a notification for this product.
Linux Linux Affected: 3.11
Unaffected: 0 , < 3.11 (semver)
Unaffected: 6.6.118 , ≤ 6.6.* (semver)
Unaffected: 6.12.60 , ≤ 6.12.* (semver)
Unaffected: 6.17.10 , ≤ 6.17.* (semver)
Unaffected: 6.18 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
Show details on NVD website
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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.

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  • 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.
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  • 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.


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