CVE-2022-49975

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.

The following products are affected by CVE-2022-49975 vulnerability.

Here, you will find a curated list of external links that provide in-depth information to CVE-2022-49975.

URL	Resource
https://git.kernel.org/stable/c/6204bf78b2a903b96ba43afff6abc0b04d6e0462
https://git.kernel.org/stable/c/72f2dc8993f10262092745a88cb2dd0fef094f23
https://git.kernel.org/stable/c/8b68e53d56697a59b5c53893b53f508bbdf272a0
https://git.kernel.org/stable/c/a75987714bd2d8e59840667a28e15c1fa5c47554
https://git.kernel.org/stable/c/fd1894224407c484f652ad456e1ce423e89bb3eb
https://lore.kernel.org/linux-cve-announce/2025061819-CVE-2022-49975-89e6@gregkh/T
https://nvd.nist.gov/vuln/detail/CVE-2022-49975
https://www.cve.org/CVERecord?id=CVE-2022-49975