netfilter: nat: use kfree_rcu to release ops
- 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- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean?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 6.6.160, 6.12.114, 6.18.33, 7.0.10
- 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: nat: use kfree_rcu to release ops Florian Westphal says: "Historically this is not an issue, even for normal base hooks: the data path doesn't use the original nf_hook_ops that are used to register the callbacks. However, in v5.14 I added the ability to dump the active netfilter hooks from userspace. This code will peek back into the nf_hook_ops that are available at the tail of the pointer-array blob used by the datapath. The nat hooks are special, because they are called indirectly from the central nat dispatcher hook. They are currently invisible to the nfnl hook dump subsystem though. But once that changes the nat ops structures have to be deferred too." Update nf_nat_register_fn() to deal with partial exposition of the hooks from error path which can be also an issue for nfnetlink_hook.
Timeline
- CVE published
- CISA SSVC assessment
Exploitation: none · Automatable: no · Technical impact: total
- Record last updated
Affected versions
- Linux Linux
From e2cf17d3774c323ef6dab6e9f7c0cfc5e742afd9 · fixed in ede973d62d26d9c550269af05366ab9e30fc92ee; From e2cf17d3774c323ef6dab6e9f7c0cfc5e742afd9 · fixed in 050f98e56782b14677c5bae50800e60775bbf6bb; From e2cf17d3774c323ef6dab6e9f7c0cfc5e742afd9 · fixed in 32fdd2e38e7435a368d88f5977a7d6585ebc8b0e; From e2cf17d3774c323ef6dab6e9f7c0cfc5e742afd9 · fixed in 3c7511f38ab511b791196b13ae48bf4973bf7dfd; From e2cf17d3774c323ef6dab6e9f7c0cfc5e742afd9 · fixed in 6eda0d771f94267f73f57c94630aa47e90957915
- Linux Linux
5.14
- KernelLinux
From 5.14.0 · fixed in 6.6.160; From 6.7.0 · fixed in 6.12.114; From 6.13.0 · fixed in 6.18.33; From 6.19.0 · fixed in 7.0.10