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().
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 5.10.140, < 5.10.146 |
Related Weaknesses (CWE)
References
- https://git.kernel.org/stable/c/710e3f526bd23a0d33435dedc52c3144de284378Patch
- https://git.kernel.org/stable/c/8bcad2a931313aeba076b76922d5813ef97d0a91Patch
- https://git.kernel.org/stable/c/91aa52652f4b37089aff3cb53e83049d826fef6dPatch
- https://git.kernel.org/stable/c/921ebde3c0d22c8cba74ce8eb3cc4626abff1ccdPatch
- https://git.kernel.org/stable/c/710e3f526bd23a0d33435dedc52c3144de284378Patch
- https://git.kernel.org/stable/c/8bcad2a931313aeba076b76922d5813ef97d0a91Patch
- https://git.kernel.org/stable/c/91aa52652f4b37089aff3cb53e83049d826fef6dPatch
- https://git.kernel.org/stable/c/921ebde3c0d22c8cba74ce8eb3cc4626abff1ccdPatch
FAQ
What is CVE-2022-48643?
CVE-2022-48643 is a vulnerability with a CVSS score of 5.5 (MEDIUM). 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_ena...
How severe is CVE-2022-48643?
CVE-2022-48643 has been rated MEDIUM with a CVSS base score of 5.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2022-48643?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.