Bug 2418884 (CVE-2025-40266) - CVE-2025-40266 kernel: KVM: arm64: Check the untrusted offset in FF-A memory share
Summary: CVE-2025-40266 kernel: KVM: arm64: Check the untrusted offset in FF-A memory ...
Keywords:
Status: NEW
Alias: CVE-2025-40266
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
unspecified
unspecified
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2025-12-04 17:02 UTC by OSIDB Bzimport
Modified: 2025-12-19 14:20 UTC (History)
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Description OSIDB Bzimport 2025-12-04 17:02:59 UTC 
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.
Comment 1 Jon Moroney 2025-12-04 17:52:59 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025120435-CVE-2025-40266-30a1@gregkh/T
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