CVE-2026-90094

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

• https://git.kernel.org/stable/c/00a73ce437e27fdc636a5ede445a4a491e01788d
• https://git.kernel.org/stable/c/2f10bc3ff24c91657887901c3235b803e5055f2b
• https://git.kernel.org/stable/c/b8f070ac3167595069feb1f794c127b805115645