CVE-2023-3776

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 0323bce598eea038714f941ce2b22541c46d488f.

Weakness classification

• CWE-416: Use After Free

Primary references

• cve-coordination@google.com — Third Party Advisory, VDB Entry
• cve-coordination@google.com — Third Party Advisory, VDB Entry
• cve-coordination@google.com — Mailing List, Patch, Vendor Advisory
• cve-coordination@google.com — Patch, Vendor Advisory
• cve-coordination@google.com — Mailing List, Third Party Advisory
• cve-coordination@google.com — Mailing List, Third Party Advisory
• cve-coordination@google.com — Third Party Advisory
• cve-coordination@google.com — Third Party Advisory
• cve-coordination@google.com — Third Party Advisory
• af854a3a-2127-422b-91ae-364da2661108 — Third Party Advisory, VDB Entry
• af854a3a-2127-422b-91ae-364da2661108 — Third Party Advisory, VDB Entry
• af854a3a-2127-422b-91ae-364da2661108 — Mailing List, Patch, Vendor Advisory