Bug 1223480 (CVE-2022-48643) - VUL-0: CVE-2022-48643: kernel: netfilter: nf_tables: fix nft_counters_enabled underflow at nf_tables_addchain()
Summary: VUL-0: CVE-2022-48643: kernel: netfilter: nf_tables: fix nft_counters_enabled...
Status: RESOLVED FIXED
Alias: CVE-2022-48643
Product: SUSE Security Incidents
Classification: Novell Products
Component: Incidents (show other bugs)
Version: unspecified
Hardware: Other Other
: P5 - None : Normal
Target Milestone: ---
Assignee: Kernel Bugs
QA Contact: Security Team bot
URL: https://smash.suse.de/issue/403400/
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Reported: 2024-04-29 09:13 UTC by SMASH SMASH
Modified: 2024-04-29 09:13 UTC (History)
1 user (show)

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Found By: Security Response Team
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Marketing QA Status: ---
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Description SMASH SMASH 2024-04-29 09:13:08 UTC 
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().

References:
http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2022-48643
https://www.cve.org/CVERecord?id=CVE-2022-48643
https://git.kernel.org/stable/c/710e3f526bd23a0d33435dedc52c3144de284378
https://git.kernel.org/stable/c/8bcad2a931313aeba076b76922d5813ef97d0a91
https://git.kernel.org/stable/c/91aa52652f4b37089aff3cb53e83049d826fef6d
https://git.kernel.org/stable/c/921ebde3c0d22c8cba74ce8eb3cc4626abff1ccd
https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2022/CVE-2022-48643.mbox
Comment 1 Robert Frohl 2024-04-29 09:13:40 UTC 
does not affect any SUSE/openSUSE kernels, closing