Instituto Nacional de ciberseguridad. Sección Incibe
Instituto Nacional de Ciberseguridad. Sección INCIBE-CERT

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CVE-2022-49975

Severity CVSS v4.0:
Pending analysis
Type:
Unavailable / Other
Publication date:
18/06/2025
Last modified:
13/11/2025

Description

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> bpf: Don&amp;#39;t redirect packets with invalid pkt_len<br /> <br /> Syzbot found an issue [1]: fq_codel_drop() try to drop a flow whitout any<br /> skbs, that is, the flow-&gt;head is null.<br /> The root cause, as the [2] says, is because that bpf_prog_test_run_skb()<br /> run a bpf prog which redirects empty skbs.<br /> So we should determine whether the length of the packet modified by bpf<br /> prog or others like bpf_prog_test is valid before forwarding it directly.

Impact

Vector 3.x
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVSS v3.1 Severity and Metrics:

Base Score: 7.80 HIGH
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): Low
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): High
Integrity (I): High
Availability (A): High

Base Score 3.x
7.80
Severity 3.x
HIGH

Vulnerable products and versions

CPE From Up to
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 5.4.212 (excluding)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 5.5 (including) 5.10.141 (excluding)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 5.11 (including) 5.15.65 (excluding)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 5.16 (including) 5.19.7 (excluding)

To consult the complete list of CPE names with products and versions, see this page


References to Advisories, Solutions, and Tools