netfilter: nf_tables: add hook transactions for device deletions
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Not listed in CISA KEV
- Fix
- Fixed in 5.11, 5.16, 5.18, 5.19, 6.18.57, and 1 more
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
- Exploitation: none
- Automatable: no
- Technical impact: total
Summary
In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_tables: add hook transactions for device deletions Restore the flag that indicates that the hook is going away, ie. NFT_HOOK_REMOVE, but add a new transaction object to track deletion of hooks without altering the basechain/flowtable hook_list during the preparation phase. The existing approach that moves the hook from the basechain/flowtable hook_list to transaction hook_list breaks netlink dump path readers of this RCU-protected list. It should be possible use an array for nft_trans_hook to store the deleted hooks to compact the representation but I am not expecting many hook object, specially now that wildcard support for devices is in place. Note that the nft_trans_chain_hooks() list contains a list of struct nft_trans_hook objects for DELCHAIN and DELFLOWTABLE commands, while this list stores struct nft_hook objects for NEWCHAIN and NEWFLOWTABLE. Note that new commands can be updated to use nft_trans_hook for consistency. This patch also adapts the event notification path to deal with the list of hook transactions.
Timeline
- CVE published
- CISA SSVC assessment
Exploitation: none · Automatable: no · Technical impact: total
- Record last updated
Affected versions
- Linux Linux
From b6d9014a3335194590abdd2a2471ef5147a67645 · fixed in 768daa9f4276be4007e88dea61a378c8582ba008; From b6d9014a3335194590abdd2a2471ef5147a67645 · fixed in 4e69bfb32b2db323d9205fdb30e284481b37817c; From b6d9014a3335194590abdd2a2471ef5147a67645 · fixed in 10f79dbd7719d1da9f5884d13060322d8729f091; From 5.10.122 · fixed in 5.11; From 5.15.47 · fixed in 5.16; From 5.17.15 · fixed in 5.18; From 5.18.4 · fixed in 5.19
- Linux Linux
5.19
- KernelLinux
From 5.19.0 · fixed in 6.18.57; From 6.19.0 · fixed in 7.0.10