CVE Catalog

CVE-2023-3776

HighCVSS 7.8
Published: Updated: Translated: NVD NIST

Exploitation Probability (EPSS)

Low risk
0.52%

40th percentile - higher than 40% of all known CVEs

Summary

A use-after-free vulnerability in the Linux kernel's net/sched: cls_fw component can be exploited to achieve local privilege escalation.

Risk Assessment

An attacker controlling the reference counter can cause the reference to be freed, leading to a risk of privilege escalation in the system.

Recommendation

We recommend upgrading past commit 0323bce598eea038714f941ce2b22541c46d488f.

Related vulnerabilities

Original NVD description (English 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.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS