cve-2023-23586
Vulnerability from cvelistv5
Published
2023-02-17 12:25
Modified
2024-08-02 10:35
Severity ?
EPSS score ?
Summary
Use after free in io_uring in the Linux Kernel
References
Impacted products
▼ | Vendor | Product |
---|---|---|
Linux | Linux Kernel |
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When this time namespace is destroyed, the vvar page is also freed, but not removed from the process\u0027 memory, and a next page allocated by the kernel will be still available from the user-space process and can leak memory contents via this (read-only) use-after-free vulnerability. We recommend upgrading past version 5.10.161 or commit\u0026nbsp;\u003ca target=\"_blank\" rel=\"nofollow\" href=\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/io_uring?h=linux-5.10.y\u0026amp;id=788d0824269bef539fe31a785b1517882eafed93\"\u003e788d0824269bef539fe31a785b1517882eafed93\u003c/a\u003e\u003c/span\u003e\u003cbr\u003e" } ], "value": "Due to a vulnerability in the io_uring subsystem, it is possible to leak kernel memory information to the user process.\u00a0timens_install calls current_is_single_threaded to determine if the current process is single-threaded, but this call does not consider io_uring\u0027s io_worker threads, thus it is possible to insert a time namespace\u0027s vvar page to process\u0027s memory space via a page fault. When this time namespace is destroyed, the vvar page is also freed, but not removed from the process\u0027 memory, and a next page allocated by the kernel will be still available from the user-space process and can leak memory contents via this (read-only) use-after-free vulnerability. We recommend upgrading past version 5.10.161 or commit\u00a0 788d0824269bef539fe31a785b1517882eafed93 https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/io_uring \n" } ], "impacts": [ { "capecId": "CAPEC-30", "descriptions": [ { "lang": "en", "value": "CAPEC-30 Hijacking a Privileged Thread of Execution" } ] } ], "metrics": [ { "cvssV3_1": { "attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "NONE", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N", "version": "3.1" }, "format": "CVSS", "scenarios": [ { "lang": "en", "value": "GENERAL" } ] } ], "problemTypes": [ { "descriptions": [ { "cweId": "CWE-416", "description": "CWE-416 Use After Free", "lang": "en", "type": "CWE" } ] } ], "providerMetadata": { "dateUpdated": "2023-02-17T12:25:35.255Z", "orgId": "14ed7db2-1595-443d-9d34-6215bf890778", "shortName": "Google" }, "references": [ { "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/io_uring?h=linux-5.10.y\u0026id=788d0824269bef539fe31a785b1517882eafed93" }, { "url": "https://kernel.dance/#788d0824269bef539fe31a785b1517882eafed93" } ], "source": { "discovery": "EXTERNAL" }, "title": "Use after free in io_uring in the Linux Kernel", "x_generator": { "engine": "Vulnogram 0.1.0-dev" } } }, "cveMetadata": { "assignerOrgId": "14ed7db2-1595-443d-9d34-6215bf890778", "assignerShortName": "Google", "cveId": "CVE-2023-23586", "datePublished": "2023-02-17T12:25:35.000Z", "dateReserved": "2023-01-13T13:15:22.698Z", "dateUpdated": "2024-08-02T10:35:33.335Z", "state": "PUBLISHED" }, "dataType": "CVE_RECORD", "dataVersion": "5.1", "meta": { "nvd": "{\"cve\":{\"id\":\"CVE-2023-23586\",\"sourceIdentifier\":\"cve-coordination@google.com\",\"published\":\"2023-02-17T13:15:10.737\",\"lastModified\":\"2023-11-07T04:07:47.083\",\"vulnStatus\":\"Modified\",\"descriptions\":[{\"lang\":\"en\",\"value\":\"Due to a vulnerability in the io_uring subsystem, it is possible to leak kernel memory information to the user process.\u00a0timens_install calls current_is_single_threaded to determine if the current process is single-threaded, but this call does not consider io_uring\u0027s io_worker threads, thus it is possible to insert a time namespace\u0027s vvar page to process\u0027s memory space via a page fault. 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Sightings
Author | Source | Type | Date |
---|
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.