CVE-2022-48643 - CVE House
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Status published Medium CVE-2022-48643

netfilter: nf_tables: fix nft_counters_enabled underflow at nf_tables_addchain()

Vulnerability Description

In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_tables: fix nft_counters_enabled underflow at nf_tables_addchain() syzbot is reporting underflow of nft_counters_enabled counter at nf_tables_addchain() [1], for commit 43eb8949cfdffa76 ("netfilter: nf_tables: do not leave chain stats enabled on error") missed that nf_tables_chain_destroy() after nft_basechain_init() in the error path of nf_tables_addchain() decrements the counter because nft_basechain_init() makes nft_is_base_chain() return true by setting NFT_CHAIN_BASE flag. Increment the counter immediately after returning from nft_basechain_init().

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

No credits recorded in the NVD database.

References

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Affected Vendor

Affected Software

Linux
Vulnerable Versions:
c907dfe4eaca9665694a0340de1458a093abe354, 6d7ddee503951641f3ec6f0e3269446970bbcdab, 98a621ef45e3605c7487f7fa6fec7df94697d6a2, 43eb8949cfdffa764b92bc6c54b87cbe5b0003fe, 5.10.140, 5.15.64, 5.19.6

Timeline

Official Publish: April 28th, 2024
Last Modified: May 11th, 2026
Added to House: July 21st, 2026

CVSS Vectors

V3: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Weaknesses (CWE)

No CWE data available

MITRE ATT&CK TTPs

No associated TTPs found for this vulnerability.