ghsa-4fhg-56x9-rf4r
Vulnerability from github
Published
2023-09-06 15:30
Modified
2024-01-11 21:31
Severity ?
Details
A use-after-free vulnerability in the Linux kernel's net/sched: cls_fw component can be exploited to achieve local privilege escalation.
When fw_change() is called on an existing filter, the whole tcf_result struct is always copied into the new instance of the filter. This causes a problem when updating a filter bound to a class, as tcf_unbind_filter() is always called on the old instance in the success path, decreasing filter_cnt of the still referenced class and allowing it to be deleted, leading to a use-after-free.
We recommend upgrading past commit 76e42ae831991c828cffa8c37736ebfb831ad5ec.
{ "affected": [], "aliases": [ "CVE-2023-4207" ], "database_specific": { "cwe_ids": [ "CWE-416" ], "github_reviewed": false, "github_reviewed_at": null, "nvd_published_at": "2023-09-06T14:15:11Z", "severity": "HIGH" }, "details": "A use-after-free vulnerability in the Linux kernel\u0027s net/sched: cls_fw component can be exploited to achieve local privilege escalation.\n\nWhen fw_change() is called on an existing filter, the whole tcf_result struct is always copied into the new instance of the filter. This causes a problem when updating a filter bound to a class, as tcf_unbind_filter() is always called on the old instance in the success path, decreasing filter_cnt of the still referenced class and allowing it to be deleted, leading to a use-after-free.\n\nWe recommend upgrading past commit 76e42ae831991c828cffa8c37736ebfb831ad5ec.\n\n", "id": "GHSA-4fhg-56x9-rf4r", "modified": "2024-01-11T21:31:15Z", "published": "2023-09-06T15:30:27Z", "references": [ { "type": "ADVISORY", "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-4207" }, { "type": "WEB", "url": "https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=76e42ae831991c828cffa8c37736ebfb831ad5ec" }, { "type": "WEB", "url": "https://kernel.dance/76e42ae831991c828cffa8c37736ebfb831ad5ec" }, { "type": "WEB", "url": "https://lists.debian.org/debian-lts-announce/2024/01/msg00004.html" }, { "type": "WEB", "url": "https://www.debian.org/security/2023/dsa-5492" } ], "schema_version": "1.4.0", "severity": [ { "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "type": "CVSS_V3" } ] }
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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.