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nftables binding to an already bound chain

Moderate severity GitHub Reviewed Published Sep 8, 2022 in siderolabs/talos • Updated Jan 11, 2023

Package

gomod github.com/siderolabs/talos (Go)

Affected versions

< 1.2.0

Patched versions

1.2.0

Description

Impact

An issue was discovered in net/netfilter/nf_tables_api.c in the Linux kernel. A denial of service can occur upon binding to an already bound chain.

Affected by this vulnerability is the function nft_verdict_init of the file net/netfilter/nf_tables_api.c. The manipulation with an unknown input leads to a denial of service vulnerability. The program does not release or incorrectly releases a resource before it is made available for re-use.

Patches

The fix has been backported to 5.15.64 version of the upstream Linux kernel (5.15 is the upstream Kernel long term version Talos ships with). Talos >= v1.2.0 is shipped with Linux Kernel 5.15.64 fixing the above issue.

Workarounds

It's recommended to upgrade

References

For more information

References

@frezbo frezbo published to siderolabs/talos Sep 8, 2022
Published to the GitHub Advisory Database Sep 16, 2022
Reviewed Sep 16, 2022
Last updated Jan 11, 2023

Severity

Moderate

EPSS score

Weaknesses

No CWEs

CVE ID

No known CVE

GHSA ID

GHSA-jr8j-2jhp-m67v

Source code

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