CVE-2026-53000
What it is
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.
At a glance
- Exploitability
- Can be exploited locally on the machine with a low-privilege account. High risk of data exposure, data tampering, service disruption.
- Exploit odds
- 0.2% chance of exploitation in the next 30 days (EPSS).
- Fix
- A patch, advisory or fixed version is referenced. Upgrade or apply it.
Timeline
- PublishedDisclosed publicly on CVE.org and NVD
- Last updatedMost recent change to the record
Why it ranks here
- Exploited in the wild: no, CISA does not list it.
- Exploit odds: 0.2% in the next 30 days (EPSS).
- Severity: 7.8 HIGH (CVSS).
- Fix: a patch or advisory is linked.
Details
- Published
- Last modified
- Exploit probability
- 0.2% · EPSS, next 30 days
- Weakness
- CWE-763
- Record status
- Modified
Affected
- Linux Kernel < 6.18.33
- Linux Kernel < 7.0.10
- Redhat Enterprise Linux 9.0
- Redhat Enterprise Linux 10.0
Attack profile CVSS 3.1 · 7.8
- Attack vector
- Local
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Raw vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Is it in your code?
Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.
Read https://cve-list.com/agent/cve/CVE-2026-53000.md and follow it. Check whether this project is affected by CVE-2026-53000. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.
Fix and advisories
- https://git.kernel.org/stable/c/32fdd2e38e7435a368d88f5977a7d6585ebc8b0e
- https://git.kernel.org/stable/c/3c7511f38ab511b791196b13ae48bf4973bf7dfd
- https://git.kernel.org/stable/c/6eda0d771f94267f73f57c94630aa47e90957915
References
- 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
- https://git.kernel.org/stable/c/bf17f1d3b307196d9282c4b1dd8be0d0e5f8e529
- https://git.kernel.org/stable/c/ede973d62d26d9c550269af05366ab9e30fc92ee
- https://access.redhat.com/errata/RHSA-2026:55445
- https://access.redhat.com/errata/RHSA-2026:64808
- https://access.redhat.com/errata/RHSA-2026:67720
- https://access.redhat.com/errata/RHSA-2026:68100
- 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