CVE-2023-3776
Use-after-free in Linux kernel's net/sched: cls_fw component
Summary
Use-after-free in Linux kernel's net/sched: cls_fw component
Original description
The description as published by the source.
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.
Fix status by distribution
Fixed packages published by each distribution for this CVE
- Debian DEBIAN-CVE-2023-3776 linux Fixed in: 5.10.191-1
- Ubuntu UBUNTU-CVE-2023-3776 linux Fixed in: 3.13.0-193.244
References
- advisory github.com
- advisory nvd.nist.gov
- advisory security.netapp.com
- advisory debian.org
- advisory debian.org
- patch git.kernel.org
- web packetstormsecurity.com
- web packetstormsecurity.com
- web git.kernel.org
- web kernel.dance
- web lists.debian.org
- web lists.debian.org