CVE-2022-48643
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…
Does this matter?
Lower severity and a low EPSS score (0.23%). Track it; it rarely justifies an emergency change on its own.
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 3.1
- 5.5 MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 0.23% probability · 14th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-191
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
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
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.