# CVE-2022-49975: linux: In the Linux kernel, the following vulnerability has been resolved:  bpf: Don't redirect packets with invalid pkt_len...

CVE-2022-49975 is fixed in linux on 1 platform, first by DEBIAN-CVE-2022-49975, released June 18, 2025. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2022-49975
- Priority: High
- CVSS: 7.8 (high)
- EPSS: 0.0027
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Jun 18, 2025

## 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.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 12.15 (bookworm) | 6.0.2-1 | [DEBIAN-CVE-2022-49975](https://patchblox.com/security/data/fix/linux/debian-cve-2022-49975.md) | Jun 18, 2025 |
| Linux | linux Debian 13.5 (trixie) | 6.0.2-1 | [DEBIAN-CVE-2022-49975](https://patchblox.com/security/data/fix/linux/debian-cve-2022-49975.md) | Jun 18, 2025 |
| Linux | linux Debian 14 | 6.0.2-1 | [DEBIAN-CVE-2022-49975](https://patchblox.com/security/data/fix/linux/debian-cve-2022-49975.md) | Jun 18, 2025 |

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