CVE-2022-48643

Summary

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().

Affected Software

VendorProductVersion RangeStatus
LinuxLinuxc907dfe4eaca9665694a0340de1458a093abe354 < 710e3f526bd23a0d33435dedc52c3144de284378affected
LinuxLinux6d7ddee503951641f3ec6f0e3269446970bbcdab < 91aa52652f4b37089aff3cb53e83049d826fef6daffected
LinuxLinux98a621ef45e3605c7487f7fa6fec7df94697d6a2 < 8bcad2a931313aeba076b76922d5813ef97d0a91affected
LinuxLinux43eb8949cfdffa764b92bc6c54b87cbe5b0003fe < 921ebde3c0d22c8cba74ce8eb3cc4626abff1ccdaffected
LinuxLinux5.10.140 < 5.10.146affected
LinuxLinux5.15.64 < 5.15.71affected
LinuxLinux5.19.6 < 5.19.12affected

Weaknesses

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: no
    • Technical Impact: partial

CVE Program Container

Additional References

References