netfilter: nfnetlink_queue: make hash table per queue
- 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- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean?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 6.12.83, 6.18.24, 6.19.14
- 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: nfnetlink_queue: make hash table per queue Sharing a global hash table among all queues is tempting, but it can cause crash: BUG: KASAN: slab-use-after-free in nfqnl_recv_verdict+0x11ac/0x15e0 [nfnetlink_queue] [..] nfqnl_recv_verdict+0x11ac/0x15e0 [nfnetlink_queue] nfnetlink_rcv_msg+0x46a/0x930 kmem_cache_alloc_node_noprof+0x11e/0x450 struct nf_queue_entry is freed via kfree, but parallel cpu can still encounter such an nf_queue_entry when walking the list. Alternative fix is to free the nf_queue_entry via kfree_rcu() instead, but as we have to alloc/free for each skb this will cause more mem pressure.
Timeline
- CVE published
- CISA SSVC assessment
Exploitation: none · Automatable: no · Technical impact: total
- Record last updated
Affected versions
- Linux Linux
From 371de2bef6582a3f58049b3d18e190924af9c9a0 · fixed in 22730cb96093b5be0609063bbb1923dbecd61252; From 870e3e63da8e88daffe9d692a025c711658018a8 · fixed in 41e3652a178cb0eecd48e0e6e27fbb73a004046a; From 70e2e3ce4f6841e12ec1c104fc76c0e707398ec4 · fixed in 9e5ebef91120d2764aefe557c3a484b6288f341f; From e19079adcd26a25d7d3e586b1837493361fdf8b6 · fixed in 936206e3f6ff411581e615e930263d6f8b78df9d
- Linux Linux
From 6.12.75 · fixed in 6.12.83; From 6.18.14 · fixed in 6.18.24; From 6.19.4 · fixed in 6.19.14
- KernelLinux
From 6.12.75 · fixed in 6.12.83; From 6.18.14 · fixed in 6.18.24; From 6.19.4 · fixed in 6.19.14