cve-2023-4207
Vulnerability from cvelistv5
Published
2023-09-06 13:53
Modified
2024-08-02 07:17
Severity ?
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Summary
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.
References
cve-coordination@google.comhttps://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=76e42ae831991c828cffa8c37736ebfb831ad5ecIssue Tracking, Mailing List, Patch, Vendor Advisory
cve-coordination@google.comhttps://kernel.dance/76e42ae831991c828cffa8c37736ebfb831ad5ecPatch, Vendor Advisory
cve-coordination@google.comhttps://lists.debian.org/debian-lts-announce/2024/01/msg00004.htmlMailing List, Third Party Advisory, VDB Entry
cve-coordination@google.comhttps://www.debian.org/security/2023/dsa-5492Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=76e42ae831991c828cffa8c37736ebfb831ad5ecIssue Tracking, Mailing List, Patch, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108https://kernel.dance/76e42ae831991c828cffa8c37736ebfb831ad5ecPatch, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108https://lists.debian.org/debian-lts-announce/2024/01/msg00004.htmlMailing List, Third Party Advisory, VDB Entry
af854a3a-2127-422b-91ae-364da2661108https://www.debian.org/security/2023/dsa-5492Third Party Advisory
Impacted products
Vendor Product Version
Show details on NVD website

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}


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