CVE-2026-53000
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.
Key facts
- CVSS score
- 7.8 (v3.1)
- Severity
- HIGH
- CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H- Weakness (CWE)
- CWE-763
- EPSS score
- 0.1% (3th percentile)
- In CISA KEV
- No
- In EU EUVD
- Yes (EUVD-2026-38868)
- Published
- June 24, 2026
- NVD last modified
- September 17, 2026
- Status
- Modified
EU Vulnerability Database (EUVD)
This vulnerability is also tracked by ENISA as EUVD-2026-38868 in the EU Vulnerability Database. Last updated in EUVD on September 17, 2026.
View on the EU Vulnerability DatabaseAffected products
- linux / linux kernel
- redhat / enterprise linux
- redhat / enterprise linux
Certified products that may be affected
8 FIPS 140 or Common Criteria certified products, from automated matching by sec-certs.org.
- Red Hat Enterprise Linux 9 Kernel Cryptographic API - Red Hat, Inc. - FIPS 140 5445 - active
- Red Hat Enterprise Linux 9 libgcrypt - Red Hat, Inc. - FIPS 140 5366 - active
- Red Hat Enterprise Linux 9 Kernel Cryptographic API - Red Hat, Inc. - FIPS 140 5034 - active
- Red Hat Enterprise Linux 9 NSS Cryptographic Module - Red Hat, Inc - FIPS 140 5022 - active
- Red Hat Enterprise Linux 9 gnutls - Red Hat, Inc. - FIPS 140 4846 - active
See all 8 in the Security Certifications Explorer.
References
- 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(Third Party Advisory)
- https://bugzilla.redhat.com/show_bug.cgi?id=2492273(Third Party Advisory)
- https://git.kernel.org/stable/c/32fdd2e38e7435a368d88f5977a7d6585ebc8b0e(Patch)
- https://git.kernel.org/stable/c/3c7511f38ab511b791196b13ae48bf4973bf7dfd(Patch)
- https://git.kernel.org/stable/c/6eda0d771f94267f73f57c94630aa47e90957915(Patch)
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-53000.json(Third Party Advisory)
Last updated September 19, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS
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