CVE-2023-3776
Severity
7.8HIGH
EPSS
0.0%
top 87.96%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
Timeline
PublishedJul 21
Latest updateNov 28
Description
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 0323bce598eea038…
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HExploitability: 1.8 | Impact: 5.9
Affected Packages3 packages
Also affects: Debian Linux 10.0, 11.0, 12.0
Patches
🔴Vulnerability Details
3GHSA▶
GHSA-fcg7-9x44-gx43: A use-after-free vulnerability in the Linux kernel's net/sched: cls_fw component can be exploited to achieve local privilege escalation↗2023-07-21
OSV▶
CVE-2023-3776: A use-after-free vulnerability in the Linux kernel's net/sched: cls_fw component can be exploited to achieve local privilege escalation↗2023-07-21