Not yet scoredPublished Sep 17, 2026

CVE-2026-90094arm64: process: Fix context switching MTE store-only tag check

Updated under an hour ago (Oct 27, 2026, 10:00 PM ET)

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Exploited in the last 30 days

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

CVSS: Not yet scored
Weakness (CWE): Not given
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Received
Record last updated: Oct 19, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	4d51ff5bba00a13ca9b0b24883fa7adb07a167fc builds before 00a73ce437e27fdc636a5ede445a4a491e01788d; 4d51ff5bba00a13ca9b0b24883fa7adb07a167fc builds before 2f10bc3ff24c91657887901c3235b803e5055f2b; from 4d51ff5bba00a13ca9b0b24883fa7adb07a167fc before b8f070ac3167595069feb1f794c127b805115645	CNA record

References

References

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

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.