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cve[email protected]CVE-2022-48643
HistoryApr 28, 2024 - 1:15 p.m.

CVE-2022-48643

2024-04-2813:15:00
web.nvd.nist.gov
23
linux kernel
nf_tables
netfilter vulnerability
syzbot reporting
counter underflow

7.4 High

AI Score

Confidence

Low

0.0004 Low

EPSS

Percentile

15.1%

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().

VendorProductVersionCPE
linuxlinux_kernel*cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linuxlinux_kernel*cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linuxlinux_kernel*cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

7.4 High

AI Score

Confidence

Low

0.0004 Low

EPSS

Percentile

15.1%