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CVE-2026-90094NVD
Vulnerability Summary
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
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
Affected & Patched Versions
- Linux Linux >= 4d51ff5bba00a13ca9b0b24883fa7adb07a167fc and < 00a73ce437e27fdc636a5ede445a4a491e01788d
- Linux Linux >= 4d51ff5bba00a13ca9b0b24883fa7adb07a167fc and < 2f10bc3ff24c91657887901c3235b803e5055f2b
- Linux Linux >= 4d51ff5bba00a13ca9b0b24883fa7adb07a167fc and < b8f070ac3167595069feb1f794c127b805115645
- Linux Linux >= 6.17
- Linux Linux 00a73ce437e27fdc636a5ede445a4a491e01788d
- Linux Linux 2f10bc3ff24c91657887901c3235b803e5055f2b
- Linux Linux b8f070ac3167595069feb1f794c127b805115645