Integer Underflow Affecting kernel-rt package, versions *
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Test your applications- Snyk ID SNYK-CENTOS7-KERNELRT-6742637
- published 30 Apr 2024
- disclosed 28 Apr 2024
Introduced: 28 Apr 2024
CVE-2022-48643 Open this link in a new tabHow to fix?
There is no fixed version for Centos:7 kernel-rt.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kernel-rt package and not the kernel-rt package as distributed by Centos.
See How to fix? for Centos:7 relevant fixed versions and status.
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
- https://access.redhat.com/security/cve/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