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Espec\u00edficamente, el controlador tpm hw_random hace uso de tpm_get_random(), y esta funci\u00f3n se llama en un bucle desde un kthread, lo que significa que no est\u00e1 congelada junto con el espacio de usuario, y por lo tanto puede competir con el trabajo realizado durante la suspensi\u00f3n del sistema: tpm tpm0: tpm_transmit: tpm_recv: error -52 tpm tpm0: TPM_STS.x 0xff no v\u00e1lido, volcando pila para an\u00e1lisis forense CPU: 0 PID: 1 Comm: init No contaminado 6.1.0-rc5+ #135 Nombre del hardware: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.0-20220807_005459-localhost 04/01/2014 Rastreo de llamadas: tpm_tis_status.cold+0x19/0x20 tpm_transmit+0x13b/0x390 tpm_transmit_cmd+0x20/0x80 tpm1_pm_suspend+0xa6/0x110 tpm_pm_suspend+0x53/0x80 __pnp_bus_suspend+0x35/0xe0 __device_suspend+0x10f/0x350 Solucione este problema llamando a tpm_try_get_ops(), que es un contenedor de tpm_chip_start(), pero toma el mutex apropiado. [Jason: mensaje de confirmaci\u00f3n redise\u00f1ado, metadatos agregados]"}], "id": "CVE-2022-48997", "lastModified": "2024-11-07T17:07:08.743", "metrics": {"cvssMetricV31": [{"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": "2024-10-21T20:15:11.503", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/23393c6461422df5bf8084a086ada9a7e17dc2ba"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/25b78bf98b07ff5aceb9b1e24f72ec0236c5c053"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/4e0d6c687c925e27fd4bc78a2721d10acf5614d6"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/571b6bbbf54d835ea6120f65575cb55cd767e603"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/d699373ac5f3545243d3c73a1ccab77fdef8cec6"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "NVD-CWE-noinfo"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"affected_release": [{"advisory": "RHSA-2023:7077", "cpe": "cpe:/o:redhat:enterprise_linux:8", "package": "kernel-0:4.18.0-513.5.1.el8_9", "product_name": "Red Hat Enterprise Linux 8", "release_date": "2023-11-14T00:00:00Z"}, {"advisory": "RHSA-2023:6583", "cpe": "cpe:/a:redhat:enterprise_linux:9", "package": "kernel-0:5.14.0-362.8.1.el9_3", "product_name": "Red Hat Enterprise Linux 9", "release_date": "2023-11-07T00:00:00Z"}, {"advisory": "RHSA-2023:6583", "cpe": "cpe:/o:redhat:enterprise_linux:9", "package": "kernel-0:5.14.0-362.8.1.el9_3", "product_name": "Red Hat Enterprise Linux 9", "release_date": "2023-11-07T00:00:00Z"}], "bugzilla": {"description": "kernel: char: tpm: Protect tpm_pm_suspend with locks", "id": "2320774", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2320774"}, "csaw": false, "cvss3": {"cvss3_base_score": "4.7", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "verified"}, "cwe": "CWE-362", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nchar: tpm: Protect tpm_pm_suspend with locks\nCurrently tpm transactions are executed unconditionally in\ntpm_pm_suspend() function, which may lead to races with other tpm\naccessors in the system.\nSpecifically, the hw_random tpm driver makes use of tpm_get_random(),\nand this function is called in a loop from a kthread, which means it's\nnot frozen alongside userspace, and so can race with the work done\nduring system suspend:\ntpm tpm0: tpm_transmit: tpm_recv: error -52\ntpm tpm0: invalid TPM_STS.x 0xff, dumping stack for forensics\nCPU: 0 PID: 1 Comm: init Not tainted 6.1.0-rc5+ #135\nHardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.0-20220807_005459-localhost 04/01/2014\nCall Trace:\ntpm_tis_status.cold+0x19/0x20\ntpm_transmit+0x13b/0x390\ntpm_transmit_cmd+0x20/0x80\ntpm1_pm_suspend+0xa6/0x110\ntpm_pm_suspend+0x53/0x80\n__pnp_bus_suspend+0x35/0xe0\n__device_suspend+0x10f/0x350\nFix this by calling tpm_try_get_ops(), which itself is a wrapper around\ntpm_chip_start(), but takes the appropriate mutex.\n[Jason: reworked commit message, added metadata]"], "name": "CVE-2022-48997", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2024-10-21T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2022-48997\nhttps://nvd.nist.gov/vuln/detail/CVE-2022-48997\nhttps://lore.kernel.org/linux-cve-announce/2024102149-CVE-2022-48997-cd65@gregkh/T"], "statement": "This issue is fixed in RHEL-9.2 and above (including 8.10):\n~~~\nin (rhel-9.3, rhel-9.4, rhel-9.5, rhel-9.6) char: tpm: Protect tpm_pm_suspend with locks\nin (rhel-8.9, rhel-8.10) char: tpm: Protect tpm_pm_suspend with locks\n~~~\nPlease note that while RHEL-9 kernel-rt still appears as affected, it has been fixed in the same RHSA as RHEL-9 kernel. This is because from RHEL-9.3 onwards, the kernel and kernel-rt fixes are bundled together in a single errata.", "threat_severity": "Moderate"}

{}