{"api_version":"1","generated_at":"2026-06-26T14:54:11+00:00","cve":"CVE-2026-53273","urls":{"html":"https://cve.report/CVE-2026-53273","api":"https://cve.report/api/cve/CVE-2026-53273.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-53273","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-53273"},"summary":{"title":"tee: optee: prevent use-after-free when the client exits before the supplicant","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ntee: optee: prevent use-after-free when the client exits before the supplicant\n\nCommit 70b0d6b0a199 (\"tee: optee: Fix supplicant wait loop\") made the\nclient wait as killable so it can be interrupted during shutdown or\nafter a supplicant crash. This changes the original lifetime expectations:\nthe client task can now terminate while the supplicant is still processing\nits request.\n\nIf the client exits first it removes the request from its queue and\nkfree()s it, while the request ID remains in supp->idr. A subsequent\nlookup on the supplicant path then dereferences freed memory, leading to\na use-after-free.\n\nSerialise access to the request with supp->mutex:\n\n  * Hold supp->mutex in optee_supp_recv() and optee_supp_send() while\n    looking up and touching the request.\n  * Let optee_supp_thrd_req() notice that the client has terminated and\n    signal optee_supp_send() accordingly.\n\nWith these changes the request cannot be freed while the supplicant still\nhas a reference, eliminating the race.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-06-25 09:16:45","updated_at":"2026-06-25 09:16:45"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/373152c94e57e9592b68c100e224fbd943cfd608","name":"https://git.kernel.org/stable/c/373152c94e57e9592b68c100e224fbd943cfd608","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/387a926ee166814611acecb960207fe2f3c4fd3e","name":"https://git.kernel.org/stable/c/387a926ee166814611acecb960207fe2f3c4fd3e","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/d366a01475f927402c96a3fe78bfc06b924fc87d","name":"https://git.kernel.org/stable/c/d366a01475f927402c96a3fe78bfc06b924fc87d","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/9a0dc9279d0907b198f205a693aedf696b08145d","name":"https://git.kernel.org/stable/c/9a0dc9279d0907b198f205a693aedf696b08145d","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/d5b57bb314d79e99bebb58a53588fa11dd4dbf69","name":"https://git.kernel.org/stable/c/d5b57bb314d79e99bebb58a53588fa11dd4dbf69","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/724d0caffd4204b46f78efe22f18f8338031c6e1","name":"https://git.kernel.org/stable/c/724d0caffd4204b46f78efe22f18f8338031c6e1","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/ae847ab29ded2d7cece4d5970f0edefa4137bf2f","name":"https://git.kernel.org/stable/c/ae847ab29ded2d7cece4d5970f0edefa4137bf2f","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/416259cb5bffecaaae5f76539deb535a8c1b2c34","name":"https://git.kernel.org/stable/c/416259cb5bffecaaae5f76539deb535a8c1b2c34","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-53273","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-53273","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 0180cf0373f84fff61b16f8c062553a13dd7cfca 416259cb5bffecaaae5f76539deb535a8c1b2c34 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected c0a9a948159153be145f9471435695373904ee6d 724d0caffd4204b46f78efe22f18f8338031c6e1 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected ec18520f5edc20a00c34a8c9fdd6507c355e880f ae847ab29ded2d7cece4d5970f0edefa4137bf2f git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected d61cc1a435e6894bfb0dd3370c6f765d2d12825d 9a0dc9279d0907b198f205a693aedf696b08145d git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 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semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5.15.179 5.15.210 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.1.130 6.1.176 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.6.80 6.6.143 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.12.17 6.12.94 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5.4.291 5.5 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.13.5 6.14 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.14","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.14 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.10.259 5.10.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.15.210 5.15.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.1.176 6.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.143 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.94 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.36 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.0.13 7.0.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.1 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"53273","cve":"CVE-2026-53273","epss":"0.001720000","percentile":"0.068470000","score_date":"2026-06-25","updated_at":"2026-06-26 00:06:14"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["drivers/tee/optee/supp.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"416259cb5bffecaaae5f76539deb535a8c1b2c34","status":"affected","version":"0180cf0373f84fff61b16f8c062553a13dd7cfca","versionType":"git"},{"lessThan":"724d0caffd4204b46f78efe22f18f8338031c6e1","status":"affected","version":"c0a9a948159153be145f9471435695373904ee6d","versionType":"git"},{"lessThan":"ae847ab29ded2d7cece4d5970f0edefa4137bf2f","status":"affected","version":"ec18520f5edc20a00c34a8c9fdd6507c355e880f","versionType":"git"},{"lessThan":"9a0dc9279d0907b198f205a693aedf696b08145d","status":"affected","version":"d61cc1a435e6894bfb0dd3370c6f765d2d12825d","versionType":"git"},{"lessThan":"d366a01475f927402c96a3fe78bfc06b924fc87d","status":"affected","version":"fd9d2d6124c293e40797a080adf8a9c237efd8b8","versionType":"git"},{"lessThan":"d5b57bb314d79e99bebb58a53588fa11dd4dbf69","status":"affected","version":"70b0d6b0a199c5a3ee6c72f5e61681ed6f759612","versionType":"git"},{"lessThan":"373152c94e57e9592b68c100e224fbd943cfd608","status":"affected","version":"70b0d6b0a199c5a3ee6c72f5e61681ed6f759612","versionType":"git"},{"lessThan":"387a926ee166814611acecb960207fe2f3c4fd3e","status":"affected","version":"70b0d6b0a199c5a3ee6c72f5e61681ed6f759612","versionType":"git"},{"status":"affected","version":"3eb4911364c764572e9db4ab900a57689a54e8ce","versionType":"git"},{"status":"affected","version":"21234efe2a8474a6d2d01ea9573319de7858ce44","versionType":"git"},{"lessThan":"5.10.259","status":"affected","version":"5.10.235","versionType":"semver"},{"lessThan":"5.15.210","status":"affected","version":"5.15.179","versionType":"semver"},{"lessThan":"6.1.176","status":"affected","version":"6.1.130","versionType":"semver"},{"lessThan":"6.6.143","status":"affected","version":"6.6.80","versionType":"semver"},{"lessThan":"6.12.94","status":"affected","version":"6.12.17","versionType":"semver"},{"lessThan":"5.5","status":"affected","version":"5.4.291","versionType":"semver"},{"lessThan":"6.14","status":"affected","version":"6.13.5","versionType":"semver"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["drivers/tee/optee/supp.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"6.14"},{"lessThan":"6.14","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"5.10.*","status":"unaffected","version":"5.10.259","versionType":"semver"},{"lessThanOrEqual":"5.15.*","status":"unaffected","version":"5.15.210","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.176","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.143","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.94","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.36","versionType":"semver"},{"lessThanOrEqual":"7.0.*","status":"unaffected","version":"7.0.13","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.1","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.10.259","versionStartIncluding":"5.10.235","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.15.210","versionStartIncluding":"5.15.179","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.1.176","versionStartIncluding":"6.1.130","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.143","versionStartIncluding":"6.6.80","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.94","versionStartIncluding":"6.12.17","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.36","versionStartIncluding":"6.14","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.0.13","versionStartIncluding":"6.14","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.1","versionStartIncluding":"6.14","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.4.291","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.13.5","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\ntee: optee: prevent use-after-free when the client exits before the supplicant\n\nCommit 70b0d6b0a199 (\"tee: optee: Fix supplicant wait loop\") made the\nclient wait as killable so it can be interrupted during shutdown or\nafter a supplicant crash. This changes the original lifetime expectations:\nthe client task can now terminate while the supplicant is still processing\nits request.\n\nIf the client exits first it removes the request from its queue and\nkfree()s it, while the request ID remains in supp->idr. A subsequent\nlookup on the supplicant path then dereferences freed memory, leading to\na use-after-free.\n\nSerialise access to the request with supp->mutex:\n\n  * Hold supp->mutex in optee_supp_recv() and optee_supp_send() while\n    looking up and touching the request.\n  * Let optee_supp_thrd_req() notice that the client has terminated and\n    signal optee_supp_send() accordingly.\n\nWith these changes the request cannot be freed while the supplicant still\nhas a reference, eliminating the race."}],"providerMetadata":{"dateUpdated":"2026-06-25T08:39:57.811Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/416259cb5bffecaaae5f76539deb535a8c1b2c34"},{"url":"https://git.kernel.org/stable/c/724d0caffd4204b46f78efe22f18f8338031c6e1"},{"url":"https://git.kernel.org/stable/c/ae847ab29ded2d7cece4d5970f0edefa4137bf2f"},{"url":"https://git.kernel.org/stable/c/9a0dc9279d0907b198f205a693aedf696b08145d"},{"url":"https://git.kernel.org/stable/c/d366a01475f927402c96a3fe78bfc06b924fc87d"},{"url":"https://git.kernel.org/stable/c/d5b57bb314d79e99bebb58a53588fa11dd4dbf69"},{"url":"https://git.kernel.org/stable/c/373152c94e57e9592b68c100e224fbd943cfd608"},{"url":"https://git.kernel.org/stable/c/387a926ee166814611acecb960207fe2f3c4fd3e"}],"title":"tee: optee: prevent use-after-free when the client exits before the supplicant","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-53273","datePublished":"2026-06-25T08:39:57.811Z","dateReserved":"2026-06-09T07:44:35.395Z","dateUpdated":"2026-06-25T08:39:57.811Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-06-25 09:16:45","lastModifiedDate":"2026-06-25 09:16:45","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"53273","Ordinal":"1","Title":"tee: optee: prevent use-after-free when the client exits before ","CVE":"CVE-2026-53273","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"53273","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\ntee: optee: prevent use-after-free when the client exits before the supplicant\n\nCommit 70b0d6b0a199 (\"tee: optee: Fix supplicant wait loop\") made the\nclient wait as killable so it can be interrupted during shutdown or\nafter a supplicant crash. This changes the original lifetime expectations:\nthe client task can now terminate while the supplicant is still processing\nits request.\n\nIf the client exits first it removes the request from its queue and\nkfree()s it, while the request ID remains in supp->idr. A subsequent\nlookup on the supplicant path then dereferences freed memory, leading to\na use-after-free.\n\nSerialise access to the request with supp->mutex:\n\n  * Hold supp->mutex in optee_supp_recv() and optee_supp_send() while\n    looking up and touching the request.\n  * Let optee_supp_thrd_req() notice that the client has terminated and\n    signal optee_supp_send() accordingly.\n\nWith these changes the request cannot be freed while the supplicant still\nhas a reference, eliminating the race.","Type":"Description","Title":"tee: optee: prevent use-after-free when the client exits before "}]}}}