CVE-2022-48643
netfilter: nf_tables: fix nft_counters_enabled underflow at nf_tables_addchain()
- Published
- Updated
- Reserved
- Assigned by
- Linux
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().
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Analyzed | 3.1 | Medium5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.23% · top 86% of all CVEs (4 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.5.
Weakness
Affected products
- affected c907dfe4eaca9665694a0340de1458a093abe354 – < 710e3f526bd23a0d33435dedc52c3144de284378
- affected 6d7ddee503951641f3ec6f0e3269446970bbcdab – < 91aa52652f4b37089aff3cb53e83049d826fef6d
- affected 98a621ef45e3605c7487f7fa6fec7df94697d6a2 – < 8bcad2a931313aeba076b76922d5813ef97d0a91
- affected 43eb8949cfdffa764b92bc6c54b87cbe5b0003fe – < 921ebde3c0d22c8cba74ce8eb3cc4626abff1ccd
- affected 5.10.140 – < 5.10.146
- affected 5.15.64 – < 5.15.71
- affected 5.19.6 – < 5.19.12
References (4)
- https://git.kernel.org/stable/c/710e3f526bd23a0d33435dedc52c3144de284378 (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/91aa52652f4b37089aff3cb53e83049d826fef6d (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/8bcad2a931313aeba076b76922d5813ef97d0a91 (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/921ebde3c0d22c8cba74ce8eb3cc4626abff1ccd (opens in a new tab)x_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2022-48643)Record last updated .