CVE-2026-90094

Not scored yetLast modified Oct 19, 2026

Description

In the Linux kernel, the following vulnerability has been resolved:

arm64: process: Fix context switching MTE store-only tag check

SCTLR_EL1.TCSO0 is set when user opt-in for MTE store-only tag check mode. However, it is not part of SCTLR_USER_MASK which imply that on context switch we never clear SCTLR_EL1.TCSO0, so we are leaking that setting into another task.

Fix that by including SCTLR_EL1_TCSO0_MASK into SCTLR_USER_MASK

Metrics

No CVSS score has been published yet.

Affected software

Source: the vendor's advisory (CNA). NVD analysis pending.

VendorProductVersions
LinuxLinux>= 4d51ff5bba00a13ca9b0b24883fa7adb07a167fc, < 00a73ce437e27fdc636a5ede445a4a491e01788d; >= 4d51ff5bba00a13ca9b0b24883fa7adb07a167fc, < 2f10bc3ff24c91657887901c3235b803e5055f2b; >= 4d51ff5bba00a13ca9b0b24883fa7adb07a167fc, < b8f070ac3167595069feb1f794c127b805115645
LinuxLinux6.17

References

Timeline

Published
Sep 17, 2026
Last modified
Oct 19, 2026
NVD status
Received

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CVE-2026-90094: Unscored | Vulnix