CVE-2023-53047

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For instance, in amdtee_open_session() after\nsess->sess_mask is set, and before setting:\n\n sess->session_info[i] = session_info;\n\nif amdtee_close_session() closes this same session, then 'sess' data\nstructure will be released, causing kernel panic when 'sess' is\naccessed within amdtee_open_session().\n\nThe solution is to set the bit sess->sess_mask as the last step in\namdtee_open_session()."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH"}, "scenarios": [{"lang": "en", "value": "AV:L - The bug is reached via local TEE ioctls (TEE_IOC_OPEN_SESSION / TEE_IOC_CLOSE_SESSION) on /dev/tee*, not via network packet processing or adjacent-link protocols.\nAC:L - The attacker drives both sides of the race with concurrent open/close ioctls on the same context; after one successful open the ta_handle is known and further session IDs are computable, and the window spans the slow TEE firmware open call.\nPR:L - tee_open/ioctl paths have no capability checks; access depends on /dev/tee* permissions, which are commonly 0660 root:tee and usable by unprivileged processes in the tee group (or equivalent Android/embedded TEE clients).\nUI:N - Exploitation requires only the attacker's own open/close ioctl sequence; no separate victim action is needed.\nS:U - This is a host-kernel use-after-free enabling privilege escalation within the same OS security authority, not a VM escape or IOMMU/sandbox boundary cross.\nC:H - The race frees struct amdtee_session while open_session still accesses it; that UAF can be turned into an arbitrary kernel read via heap reuse.\nI:H - The same UAF of the session object enables heap spraying and write/control-flow primitives for integrity compromise or code execution.\nA:H - The commit documents kernel panic on the freed sess access, and UAFs reliably cause oops/panic even when not fully exploited."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/tee/amdtee/core.c"], "versions": [{"version": "757cc3e9ff1d72d014096399d6e2bf03974d9da1", "lessThan": "f632a90f8e39db39b322107b9a8d438b826a7f4f", "status": "affected", "versionType": "git"}, {"version": "757cc3e9ff1d72d014096399d6e2bf03974d9da1", "lessThan": "02b296978a2137d7128151c542e84dc96400bc00", "status": "affected", "versionType": "git"}, {"version": "757cc3e9ff1d72d014096399d6e2bf03974d9da1", "lessThan": "a63cce9393e4e7dbc5af82dc87e68cb321cb1a78", "status": "affected", "versionType": "git"}, {"version": "757cc3e9ff1d72d014096399d6e2bf03974d9da1", "lessThan": "b3ef9e6fe09f1a132af28c623edcf4d4f39d9f35", "status": "affected", "versionType": "git"}, {"version": "757cc3e9ff1d72d014096399d6e2bf03974d9da1", "lessThan": "f8502fba45bd30e1a6a354d9d898bc99d1a11e6d", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/tee/amdtee/core.c"], "versions": [{"version": "5.6", "status": "affected"}, {"version": "0", "lessThan": "5.6", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.177", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.105", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.22", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.2.9", "lessThanOrEqual": "6.2.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.3", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.6", "versionEndExcluding": "5.10.177"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.6", "versionEndExcluding": "5.15.105"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.6", "versionEndExcluding": "6.1.22"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.6", "versionEndExcluding": "6.2.9"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.6", "versionEndExcluding": "6.3"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/f632a90f8e39db39b322107b9a8d438b826a7f4f"}, {"url": "https://git.kernel.org/stable/c/02b296978a2137d7128151c542e84dc96400bc00"}, {"url": "https://git.kernel.org/stable/c/a63cce9393e4e7dbc5af82dc87e68cb321cb1a78"}, {"url": "https://git.kernel.org/stable/c/b3ef9e6fe09f1a132af28c623edcf4d4f39d9f35"}, {"url": "https://git.kernel.org/stable/c/f8502fba45bd30e1a6a354d9d898bc99d1a11e6d"}], "title": "tee: amdtee: fix race condition in amdtee_open_session", "x_generator": {"engine": "bippy-1.2.0"}}}}

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{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/tee/amdtee/core.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "f632a90f8e39db39b322107b9a8d438b826a7f4f", "status": "affected", "version": "757cc3e9ff1d72d014096399d6e2bf03974d9da1", "versionType": "git"}, {"lessThan": "02b296978a2137d7128151c542e84dc96400bc00", "status": "affected", "version": "757cc3e9ff1d72d014096399d6e2bf03974d9da1", "versionType": "git"}, {"lessThan": "a63cce9393e4e7dbc5af82dc87e68cb321cb1a78", "status": "affected", "version": "757cc3e9ff1d72d014096399d6e2bf03974d9da1", "versionType": "git"}, {"lessThan": "b3ef9e6fe09f1a132af28c623edcf4d4f39d9f35", "status": "affected", "version": "757cc3e9ff1d72d014096399d6e2bf03974d9da1", "versionType": "git"}, {"lessThan": "f8502fba45bd30e1a6a354d9d898bc99d1a11e6d", "status": "affected", "version": "757cc3e9ff1d72d014096399d6e2bf03974d9da1", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/tee/amdtee/core.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "5.6"}, {"lessThan": "5.6", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "5.10.*", "status": "unaffected", "version": "5.10.177", "versionType": "semver"}, {"lessThanOrEqual": "5.15.*", "status": "unaffected", "version": "5.15.105", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.22", "versionType": "semver"}, {"lessThanOrEqual": "6.2.*", "status": "unaffected", "version": "6.2.9", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "6.3", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "98341430-98CD-48EB-BD2E-D8C7105EDE74", "versionEndExcluding": "5.10.177", "versionStartIncluding": "5.6", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "0888AE70-CB0A-45C0-B9BD-A5371244C8DB", "versionEndExcluding": "5.15.105", "versionStartIncluding": "5.11", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "642B6F99-95C6-47F5-A9B1-5C45FE08CAD0", "versionEndExcluding": "6.1.22", "versionStartIncluding": "5.16", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "914F22DD-1E6F-4B0A-A14D-3A9F068F6761", "versionEndExcluding": "6.2.9", "versionStartIncluding": "6.2", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.3:rc1:*:*:*:*:*:*", "matchCriteriaId": "B8E3B0E8-FA27-4305-87BB-AF6C25B160CB", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.3:rc2:*:*:*:*:*:*", "matchCriteriaId": "A47F0FC3-CE52-4BA1-BA51-22F783938431", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.3:rc3:*:*:*:*:*:*", "matchCriteriaId": "3583026A-27EC-4A4C-850A-83F2AF970673", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntee: amdtee: fix race condition in amdtee_open_session\n\nThere is a potential race condition in amdtee_open_session that may\nlead to use-after-free. For instance, in amdtee_open_session() after\nsess->sess_mask is set, and before setting:\n\n sess->session_info[i] = session_info;\n\nif amdtee_close_session() closes this same session, then 'sess' data\nstructure will be released, causing kernel panic when 'sess' is\naccessed within amdtee_open_session().\n\nThe solution is to set the bit sess->sess_mask as the last step in\namdtee_open_session()."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: tee: amdtee: correcci\u00f3n de la condici\u00f3n de ejecuci\u00f3n en amdtee_open_session. Existe una posible condici\u00f3n de ejecuci\u00f3n en amdtee_open_session que podr\u00eda provocar un use-after-free. Por ejemplo, en amdtee_open_session(), despu\u00e9s de configurar sess->sess_mask y antes de configurar: sess->session_info[i] = session_info; si amdtee_close_session() cierra esta misma sesi\u00f3n, se liberar\u00e1 la estructura de datos 'sess', lo que provocar\u00e1 un p\u00e1nico del kernel al acceder a 'sess' dentro de amdtee_open_session(). La soluci\u00f3n es configurar el bit sess->sess_mask como \u00faltimo paso en amdtee_open_session()."}], "id": "CVE-2023-53047", "lastModified": "2026-08-04T10:18:53.250", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}, {"cvssData": {"attackComplexity": "HIGH", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 4.7, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.0, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2025-05-02T16:15:23.790", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/02b296978a2137d7128151c542e84dc96400bc00"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/a63cce9393e4e7dbc5af82dc87e68cb321cb1a78"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/b3ef9e6fe09f1a132af28c623edcf4d4f39d9f35"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/f632a90f8e39db39b322107b9a8d438b826a7f4f"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/f8502fba45bd30e1a6a354d9d898bc99d1a11e6d"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-362"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"affected_release": [{"advisory": "RHSA-2024:2394", "cpe": "cpe:/a:redhat:enterprise_linux:9", "package": "kernel-0:5.14.0-427.13.1.el9_4", "product_name": "Red Hat Enterprise Linux 9", "release_date": "2024-04-30T00:00:00Z"}, {"advisory": "RHSA-2024:2394", "cpe": "cpe:/o:redhat:enterprise_linux:9", "package": "kernel-0:5.14.0-427.13.1.el9_4", "product_name": "Red Hat Enterprise Linux 9", "release_date": "2024-04-30T00:00:00Z"}], "bugzilla": {"description": "kernel: tee: amdtee: fix race condition in amdtee_open_session", "id": "2363689", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2363689"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.0", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "status": "verified"}, "cwe": "CWE-826", "details": ["In the Linux kernel, the following vulnerability has been resolved:\ntee: amdtee: fix race condition in amdtee_open_session\nThere is a potential race condition in amdtee_open_session that may\nlead to use-after-free. For instance, in amdtee_open_session() after\nsess->sess_mask is set, and before setting:\nsess->session_info[i] = session_info;\nif amdtee_close_session() closes this same session, then 'sess' data\nstructure will be released, causing kernel panic when 'sess' is\naccessed within amdtee_open_session().\nThe solution is to set the bit sess->sess_mask as the last step in\namdtee_open_session().", "A use-after-free vulnerability was found in the AMD TEE driver in the Linux kernel. The flaw occurs from a race condition in the `amdtee_open_session()` function, where the session is marked as active in `sess->sess_mask` before the corresponding `sess` structure is fully initialized. If a parallel thread invokes `amdtee_close_session()` during this window of time, it can lead to the structure being freed prematurely. This can lead to system instability, a denial of service, or remote code execution."], "name": "CVE-2023-53047", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2025-05-02T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2023-53047\nhttps://nvd.nist.gov/vuln/detail/CVE-2023-53047\nhttps://lore.kernel.org/linux-cve-announce/2025050204-CVE-2023-53047-7e31@gregkh/T"], "threat_severity": "Moderate"}

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