CVE-2022-49975

HIGH

MEDIUM Priority: 0.02 BB Relevance: 41/100

Published: 2025-06-18 Modified: 2026-11-05 First seen: 2026-11-05 Status: active

Attack Surface

Low Complexity No Interaction Conf. Impact Integ. Impact

CVSS Vector Breakdown

AV: Local

AC: Low

PR: Low

UI: None

S: Unchanged

C: High

I: High

A: High

Description

In the Linux kernel, the following vulnerability has been resolved: bpf: Don't redirect packets with invalid pkt_len Syzbot found an issue [1]: fq_codel_drop() try to drop a flow whitout any skbs, that is, the flow->head is null. The root cause, as the [2] says, is because that bpf_prog_test_run_skb() run a bpf prog which redirects empty skbs. So we should determine whether the length of the packet modified by bpf prog or others like bpf_prog_test is valid before forwarding it directly.

Affected Software (7)

Vendor	Product	Version
Linux	Linux	5293efe62df81908f2e90c9820c7edcc8e61f5e9 < 8b68e53d56697a59b5c53893b53f508bbdf272a0
Linux	Linux	5293efe62df81908f2e90c9820c7edcc8e61f5e9 < 6204bf78b2a903b96ba43afff6abc0b04d6e0462
Linux	Linux	5293efe62df81908f2e90c9820c7edcc8e61f5e9 < a75987714bd2d8e59840667a28e15c1fa5c47554
Linux	Linux	5293efe62df81908f2e90c9820c7edcc8e61f5e9 < 72f2dc8993f10262092745a88cb2dd0fef094f23
Linux	Linux	5293efe62df81908f2e90c9820c7edcc8e61f5e9 < fd1894224407c484f652ad456e1ce423e89bb3eb
Linux	Linux	4.9
linux	linux_kernel	< 5.4.212