netfilter: nf_conntrack: defer invalid log until after unlock
- 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- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean?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 6.1.184, 6.6.152, 6.12.104, 6.18.45, 7.1.9
- 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: yes
- Technical impact: partial
Summary
In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_conntrack: defer invalid log until after unlock TCP and SCTP conntrack paths can emit invalid-packet logs while ct->lock is still held. When invalid logging is routed to nfnetlink_log and conntrack export is enabled, the log path can re-enter conntrack netlink glue and dump the same conntrack again. Protocol attribute dumping may take ct->lock, so logging while holding that lock can deadlock. Defer the TCP invalid logs by storing only the minimal log context while ct->lock is held and emitting the log after unlocking. Also make the TCP timeout-lowering invalid path return whether a log is needed, then emit that log after unlocking. Do the same for the SCTP invalid state-transition log that can be reached while ct->lock is held. Add a lockdep assertion to nf_ct_l4proto_log_invalid() so future callers that log invalid conntracks while holding ct->lock are caught outside TCP and SCTP as well.
Timeline
- CVE published
- CISA SSVC assessment
Exploitation: none · Automatable: yes · Technical impact: partial
- Record last updated
Affected versions
- Linux Linux
From d9a6f0d0df1899ff9086a57abc600e414f4b8cdd · fixed in ca97360eba4b3dc67f1804625542f4ccc774242a; From d9a6f0d0df1899ff9086a57abc600e414f4b8cdd · fixed in 63853eb20bba4e00b7cd0b8cfc19337bbaaf5037; From d9a6f0d0df1899ff9086a57abc600e414f4b8cdd · fixed in 9480fcf70a5aa9d320088a01c95df0e5e6391f4a; From d9a6f0d0df1899ff9086a57abc600e414f4b8cdd · fixed in 0424186d570aa4d1ad17f516afb86bd9eaa4f42e; From d9a6f0d0df1899ff9086a57abc600e414f4b8cdd · fixed in c0224327b7cbed9d3198e8dbec847281053dcd06; From d9a6f0d0df1899ff9086a57abc600e414f4b8cdd · fixed in 2d19b95c9723001f214f7a47d67b09f46238f200
- Linux Linux
6.1
- KernelLinux
From 6.1.0 · fixed in 6.1.184; From 6.2.0 · fixed in 6.6.152; From 6.7.0 · fixed in 6.12.104; From 6.13.0 · fixed in 6.18.45; From 6.19.0 · fixed in 7.1.9