Bugzilla – Bug 1215110
VUL-0: CVE-2023-4206: kernel-source,kernel-source-rt,kernel-source-azure: net/sched UAF
Last modified: 2023-09-12 07:15:20 UTC
CVE-2023-4206 A use-after-free vulnerability in the Linux kernel's net/sched: cls_route component can be exploited to achieve local privilege escalation. When route4_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 b80b829e9e2c1b3f7aae34855e04d8f6ecaf13c8. https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=b80b829e9e2c1b3f7aae34855e04d8f6ecaf13c8 https://kernel.dance/b80b829e9e2c1b3f7aae34855e04d8f6ecaf13c8 References: http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2023-4206 https://bugzilla.redhat.com/show_bug.cgi?id=2237757 https://www.cve.org/CVERecord?id=CVE-2023-4206 https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=b80b829e9e2c1b3f7aae34855e04d8f6ecaf13c8 https://kernel.dance/b80b829e9e2c1b3f7aae34855e04d8f6ecaf13c8
It looks like a duplicate to: https://bugzilla.suse.com/show_bug.cgi?id=1214149 I will talk to mitre
Alphabet CNA confirmed that this is the same fix as bnc#1214149, closing as duplicate *** This bug has been marked as a duplicate of bug 1214149 ***