CVE-2022-36946

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 8.9% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2022-07-27 · updated 2026-10-14

Description

nfqnl_mangle in net/netfilter/nfnetlink_queue.c in the Linux kernel through 5.18.14 allows remote attackers to cause a denial of service (panic) because, in the case of an nf_queue verdict with a one-byte nfta_payload attribute, an skb_pull can encounter a negative skb->len.

Affected products

Debian Linux: 10.0, 11.0
Linux kernel: from 2.6.14 before 4.9.326; from 4.10 before 4.14.291; from 4.15 before 4.19.255; from 4.20 before 5.4.209; from 5.5 before 5.10.135; from 5.11 before 5.15.59 — fixed in 4.14.291, 4.19.255, 4.9.326, 5.10.135, 5.15.59, 5.18.16
Active IQ Unified Manager for VMware vSphere, Linux, and Microsoft Windows: all versions
NetApp Hci Compute Node: all versions
NetApp Solidfire & Hci Management Node: all versions
NetApp Solidfire & Hci Storage Node: all versions
NetApp Solidfire Enterprise Sds: all versions

How to fix

Upgrade to a fixed version: Linux kernel 4.14.291, 4.19.255, 4.9.326, 5.10.135. Check the vendor advisory for mitigations.

References

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