PRIOn knowledge basePRION:CVE-2023-3776Design/Logic Flaw
A use-after-free vulnerability in the Linux kernel’s net/sched: cls_fw component can be exploited to achieve local privilege escalation.
If tcf_change_indev() fails, fw_set_parms() will immediately return an error after incrementing or decrementing the reference counter in tcf_bind_filter(). If an attacker can control the reference counter and set it to zero, they can cause the reference to be freed, leading to a use-after-free vulnerability.
We recommend upgrading past commit 0323bce598eea038714f941ce2b22541c46d488f.
| CPE | Name | Operator | Version |
|---|---|---|---|
| debian_linux | eq | 10.0 | |
| debian_linux | eq | 11.0 | |
| debian_linux | eq | 12.0 | |
| linux_kernel | eq | 6.5 rc1 | |
| linux_kernel | ge | 2.6 | |
| linux_kernel | lt | 6.5 |
References
packetstormsecurity.com/files/175072/Kernel-Live-Patch-Security-Notice-LSN-0098-1.html
packetstormsecurity.com/files/175963/Kernel-Live-Patch-Security-Notice-LSN-0099-1.html
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit?id=0323bce598eea038714f941ce2b22541c46d488f
kernel.dance/0323bce598eea038714f941ce2b22541c46d488f
lists.debian.org/debian-lts-announce/2023/10/msg00027.html
lists.debian.org/debian-lts-announce/2024/01/msg00004.html
security.netapp.com/advisory/ntap-20240202-0003/
www.debian.org/security/2023/dsa-5480
www.debian.org/security/2023/dsa-5492
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