What is CVE-2026-93266?

CVE-2026-93266 is a unscored severity Linux kernel vulnerability, affecting Linux kernel versions from 6.13 onward and patched in 6.18.52, 7.2.6 and 7.3-rc1. CVE-2026-93266 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2026-93266?

CVE-2026-93266 has a CVSS score of pending NVD analysis out of 10, rated awaiting scoring severity.

Is there a patch available for CVE-2026-93266?

Yes, CVE-2026-93266 has been patched. Fixed versions include 6.18.52, 7.2.6 and 7.3-rc1. If you are running Linux kernel 6.13 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2026-93266 actively exploited?

CVE-2026-93266 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2026-93266

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

Package Linux Kernel

Published 2026-09-24

Last modified 2026-09-24

Patch available

Yes

Affected versions

Linux kernel versions 6.13 and later are affected. Fixed in 6.18.52, 7.2.6, 7.3-rc1 and their respective stable series.

Affected from

≥ 6.13

Fixed in

✓ 6.18.52 6.18.x ✓ 7.2.6 7.2.x ✓ 7.3-rc1

References

3 total

Frequently asked questions

What is CVE-2026-93266?

CVE-2026-93266 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 6.13 onward and has been patched in 6.18.52, 7.2.6 and 7.3-rc1. CVE-2026-93266 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
Is there a patch available for CVE-2026-93266?

Yes. CVE-2026-93266 has been patched. Fixed versions include 6.18.52, 7.2.6 and 7.3-rc1. If you are running Linux kernel 6.13 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2026-93266 actively exploited?

No. CVE-2026-93266 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.