fkie_cve-2022-4696
Vulnerability from fkie_nvd
Published
2023-01-11 13:15
Modified
2024-11-21 07:35
Severity ?
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Summary
There exists a use-after-free vulnerability in the Linux kernel through io_uring and the IORING_OP_SPLICE operation. If IORING_OP_SPLICE is missing the IO_WQ_WORK_FILES flag, which signals that the operation won't use current->nsproxy, so its reference counter is not increased. This assumption is not always true as calling io_splice on specific files will call the get_uts function which will use current->nsproxy leading to invalidly decreasing its reference counter later causing the use-after-free vulnerability. We recommend upgrading to version 5.10.160 or above
References
Impacted products
Vendor | Product | Version | |
---|---|---|---|
linux | linux_kernel | * |
{ "configurations": [ { "nodes": [ { "cpeMatch": [ { "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "8919F320-7EC7-47EF-AFA9-126CDF30AB7B", "versionEndExcluding": "5.12", "versionStartIncluding": "5.10", "vulnerable": true } ], "negate": false, "operator": "OR" } ] } ], "cveTags": [], "descriptions": [ { "lang": "en", "value": "There exists a use-after-free vulnerability in the Linux kernel through io_uring and the\u00a0IORING_OP_SPLICE operation. If\u00a0IORING_OP_SPLICE is\u00a0missing the IO_WQ_WORK_FILES flag, which signals that the operation won\u0027t use current-\u003ensproxy, so its reference counter is not increased. This assumption is not always true as calling io_splice on specific files will call the get_uts function which will use current-\u003ensproxy leading to invalidly decreasing its reference counter later causing the use-after-free vulnerability. We recommend upgrading to version 5.10.160 or above\n" }, { "lang": "es", "value": "Existe una vulnerabilidad de use-after-free en el kernel de Linux a trav\u00e9s de io_uring y la operaci\u00f3n IORING_OP_SPLICE. Si a IORING_OP_SPLICE le falta el indicador IO_WQ_WORK_FILES, que indica que la operaci\u00f3n no utilizar\u00e1 current-\u0026gt;nsproxy, por lo que su contador de referencia no aumenta. Esta suposici\u00f3n no siempre es cierta, ya que llamar a io_splice en archivos espec\u00edficos llamar\u00e1 a la funci\u00f3n get_uts, que utilizar\u00e1 current-\u0026gt;nsproxy, lo que provocar\u00e1 una disminuci\u00f3n no v\u00e1lida de su contador de referencia y luego provocar\u00e1 la vulnerabilidad de use-after-free. Recomendamos actualizar a la versi\u00f3n 5.10.160 o superior" } ], "id": "CVE-2022-4696", "lastModified": "2024-11-21T07:35:45.190", "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": "cve-coordination@google.com", "type": "Secondary" }, { "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": "nvd@nist.gov", "type": "Primary" } ] }, "published": "2023-01-11T13:15:09.307", "references": [ { "source": "cve-coordination@google.com", "tags": [ "Mailing List", "Patch", "Vendor Advisory" ], "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=linux-5.10.y\u0026id=75454b4bbfc7e6a4dd8338556f36ea9107ddf61a" }, { "source": "cve-coordination@google.com", "tags": [ "Exploit", "Third Party Advisory" ], "url": "https://kernel.dance/#75454b4bbfc7e6a4dd8338556f36ea9107ddf61a" }, { "source": "af854a3a-2127-422b-91ae-364da2661108", "tags": [ "Mailing List", "Patch", "Vendor Advisory" ], "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=linux-5.10.y\u0026id=75454b4bbfc7e6a4dd8338556f36ea9107ddf61a" }, { "source": "af854a3a-2127-422b-91ae-364da2661108", "tags": [ "Exploit", "Third Party Advisory" ], "url": "https://kernel.dance/#75454b4bbfc7e6a4dd8338556f36ea9107ddf61a" }, { "source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://security.netapp.com/advisory/ntap-20230223-0003/" } ], "sourceIdentifier": "cve-coordination@google.com", "vulnStatus": "Modified", "weaknesses": [ { "description": [ { "lang": "en", "value": "CWE-763" } ], "source": "cve-coordination@google.com", "type": "Secondary" }, { "description": [ { "lang": "en", "value": "CWE-416" } ], "source": "nvd@nist.gov", "type": "Primary" } ] }
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Sightings
Author | Source | Type | Date |
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Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
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