CVE-2024-26835: netfilter: nf_tables: set dormant flag on hook register failure

Severity: medium (CVSS 5.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2024-04-17 · updated 2026-10-15

Description

In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_tables: set dormant flag on hook register failure We need to set the dormant flag again if we fail to register the hooks. During memory pressure hook registration can fail and we end up with a table marked as active but no registered hooks. On table/base chain deletion, nf_tables will attempt to unregister the hook again which yields a warn splat from the nftables core.

Affected products

Debian Linux: 10.0
Linux kernel: from 5.4.262 before 5.4.270; from 5.10.202 before 5.10.211; from 5.13 before 5.15.150; from 5.16 before 6.1.80; from 6.2 before 6.6.19; from 6.7 before 6.7.7 — fixed in 5.10.211, 5.15.150, 5.4.270, 6.1.80, 6.6.19, 6.7.7

How to fix

Upgrade to a fixed version: Linux kernel 5.10.211, 5.15.150, 5.4.270, 6.1.80. Check the vendor advisory for mitigations.

References

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