{"id":"CVE-2026-90094","state":"PUBLISHED","title":"arm64: process: Fix context switching MTE store-only tag check","description":"In the Linux kernel, the following vulnerability has been resolved:\n\narm64: process: Fix context switching MTE store-only tag check\n\nSCTLR_EL1.TCSO0 is set when user opt-in for MTE store-only tag check\nmode. However, it is not part of SCTLR_USER_MASK which imply that on\ncontext switch we never clear SCTLR_EL1.TCSO0, so we are leaking that\nsetting into another task.\n\nFix that by including SCTLR_EL1_TCSO0_MASK into SCTLR_USER_MASK","publishedAt":"2026-09-17T16:06:07.494Z","updatedAt":"2026-10-19T08:57:52.615Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"4d51ff5bba00a13ca9b0b24883fa7adb07a167fc","status":"affected","lessThan":"00a73ce437e27fdc636a5ede445a4a491e01788d","versionType":"git"},{"version":"4d51ff5bba00a13ca9b0b24883fa7adb07a167fc","status":"affected","lessThan":"2f10bc3ff24c91657887901c3235b803e5055f2b","versionType":"git"},{"version":"4d51ff5bba00a13ca9b0b24883fa7adb07a167fc","status":"affected","lessThan":"b8f070ac3167595069feb1f794c127b805115645","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["arch/arm64/include/asm/processor.h"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.17","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.17","versionType":"semver"},{"version":"6.18.52","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.6","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["arch/arm64/include/asm/processor.h"]}],"references":["https://git.kernel.org/stable/c/00a73ce437e27fdc636a5ede445a4a491e01788d","https://git.kernel.org/stable/c/2f10bc3ff24c91657887901c3235b803e5055f2b","https://git.kernel.org/stable/c/b8f070ac3167595069feb1f794c127b805115645"],"weaknesses":[],"ingestedAt":"2026-10-29T20:13:34.582Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/90xxx/CVE-2026-90094.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-90094","state":"PUBLISHED","datePublished":"2026-09-17T16:06:07.494Z","dateUpdated":"2026-10-19T08:57:52.615Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-09-11T19:38:34.786Z"},"containers":{"cna":{"title":"arm64: process: Fix context switching MTE store-only tag check","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\narm64: process: Fix context switching MTE store-only tag check\n\nSCTLR_EL1.TCSO0 is set when user opt-in for MTE store-only tag check\nmode. However, it is not part of SCTLR_USER_MASK which imply that on\ncontext switch we never clear SCTLR_EL1.TCSO0, so we are leaking that\nsetting into another task.\n\nFix that by including SCTLR_EL1_TCSO0_MASK into SCTLR_USER_MASK"}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"4d51ff5bba00a13ca9b0b24883fa7adb07a167fc","status":"affected","lessThan":"00a73ce437e27fdc636a5ede445a4a491e01788d","versionType":"git"},{"version":"4d51ff5bba00a13ca9b0b24883fa7adb07a167fc","status":"affected","lessThan":"2f10bc3ff24c91657887901c3235b803e5055f2b","versionType":"git"},{"version":"4d51ff5bba00a13ca9b0b24883fa7adb07a167fc","status":"affected","lessThan":"b8f070ac3167595069feb1f794c127b805115645","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["arch/arm64/include/asm/processor.h"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.17","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.17","versionType":"semver"},{"version":"6.18.52","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.6","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["arch/arm64/include/asm/processor.h"]}],"references":[{"url":"https://git.kernel.org/stable/c/00a73ce437e27fdc636a5ede445a4a491e01788d"},{"url":"https://git.kernel.org/stable/c/2f10bc3ff24c91657887901c3235b803e5055f2b"},{"url":"https://git.kernel.org/stable/c/b8f070ac3167595069feb1f794c127b805115645"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-10-19T08:57:52.615Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.17","versionEndExcluding":"6.18.52"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.17","versionEndExcluding":"7.2.6"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.17","versionEndExcluding":"7.3"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}