Bug 2451274 (CVE-2026-23288)

Summary: CVE-2026-23288 kernel: accel/amdxdna: Fix out-of-bounds memset in command slot handling
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security <prodsec-ir-bot>
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Version: unspecifiedKeywords: Security
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OS: Linux   
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A flaw was found in the Linux kernel's accel/amdxdna component. This vulnerability occurs when clearing a command header with `memset()` before verifying the available slot space, which can be smaller than the header size. This can lead to an out-of-bounds write and memory corruption. An attacker could potentially exploit this to cause a denial of service or other unpredictable system behavior.
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Description OSIDB Bzimport 2026-03-25 11:08:18 UTC 
In the Linux kernel, the following vulnerability has been resolved:

accel/amdxdna: Fix out-of-bounds memset in command slot handling

The remaining space in a command slot may be smaller than the size of
the command header. Clearing the command header with memset() before
verifying the available slot space can result in an out-of-bounds write
and memory corruption.

Fix this by moving the memset() call after the size validation.
Comment 1 Alexander B 2026-03-25 11:39:22 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026032524-CVE-2026-23288-1d11@gregkh/T