Description (CNA)
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.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected e2cf17d3774c323ef6dab6e9f7c0cfc5e742afd9 before ede973d62d26d9c550269af05366ab9e30fc92ee; affected e2cf17d3774c323ef6dab6e9f7c0cfc5e742afd9 before 050f98e56782b14677c5bae50800e60775bbf6bb; affected e2cf17d3774c323ef6dab6e9f7c0cfc5e742afd9 before 32fdd2e38e7435a368d88f5977a7d6585ebc8b0e; affected e2cf17d3774c323ef6dab6e9f7c0cfc5e742afd9 before 3c7511f38ab511b791196b13ae48bf4973bf7dfd; affected e2cf17d3774c323ef6dab6e9f7c0cfc5e742afd9 before 6eda0d771f94267f73f57c94630aa47e90957915 |
| Linux / Linux | affected 5.14; unaffected 0 before 5.14; unaffected 6.6.160 through 6.6.*; unaffected 6.12.114 through 6.12.*; unaffected 6.18.33 through 6.18.*; unaffected 7.0.10 through 7.0.*; unaffected 7.1 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/ede973d62d26d9c550269af05366ab9e30fc92ee
- https://git.kernel.org/stable/c/050f98e56782b14677c5bae50800e60775bbf6bb
- https://git.kernel.org/stable/c/32fdd2e38e7435a368d88f5977a7d6585ebc8b0e
- https://git.kernel.org/stable/c/3c7511f38ab511b791196b13ae48bf4973bf7dfd
- https://git.kernel.org/stable/c/6eda0d771f94267f73f57c94630aa47e90957915
ADP enrichment
A flaw was found in the Linux kernel's netfilter component, specifically within the Network Address Translation (NAT) subsystem. This vulnerability involves improper memory management when releasing network filter operation structures. This could potentially allow an attacker to cause a system crash, leading to a Denial of Service (DoS), or to gain unauthorized access to sensitive information due to the partial exposure of internal hook data during error handling.
- https://access.redhat.com/security/cve/CVE-2026-53000
- https://bugzilla.redhat.com/show_bug.cgi?id=2492273
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-53000.json
- https://access.redhat.com/errata/RHSA-2026:55445
- https://access.redhat.com/errata/RHSA-2026:68100
- https://access.redhat.com/errata/RHSA-2026:67720
- https://access.redhat.com/errata/RHSA-2026:64808
No English description supplied.
No references supplied.