CVE-2026-93266

CVE CVE-2026-93266EUVD EUVD-2026-86138Published 2026-09-24T15:52:05.000Z

What the advisory describes

In the Linux kernel, the following vulnerability has been resolved: arm64: RSI: fix field-spanning write warning in attestation token init The challenge is passed in registers a1 through a8. However, copying to &regs.a1 makes FORTIFY treat the destination as the single a1 field, resulting in a field-spanning write warning. [1] Overlay the SMCCC register structure with an RSI-specific argument layout and copy the challenge into an explicit 64-byte array. This keeps the existing a1-a8 argument encoding while giving the copy a correctly sized destination object. [1] memcpy: detected field-spanning write (size 64) of single field "&regs.a1" at ./arch/arm64/include/asm/rsi_cmds.h:119 (size 8) WARNING: ./arch/arm64/include/asm/rsi_cmds.h:119 at rsi_attestation_token_init+0xdc/0xf8 [arm_cca_guest], CPU#0: cat/3314

Source: EUVD (ENISA), in the words of the advisory.

Products the advisory names

These come from the advisory itself, not from any check we performed.

Linux — Linux patch: 7.2.6; patch: 7.3-rc1; b880a80011f56880f32bde47fc6af313359f926b <d29a8ee271da17b5e32d7a76a9c78d43f66447ca; b880a80011f56880f32bde47fc6af313359f926b <221049874b6a78c7d87bc826581b0695cd338e2b; 6.13; b880a80011f56880f32bde47fc6af313359f926b <e505092cb200d430d5b8d8d3e926d45f29474ba3; patch: 0; patch: 6.18.52

The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.

Carried in the product catalogue

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Linux — Linux

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