Skip to main content
Public proof of conceptFix available

CVE-2022-25636

A public proof of concept exists; no exploitation attested.

  • Published2022-02-24
  • Fixed in5.16.12 · 5.15.26 · 5.10.103 · 5.4.182
  • WeaknessCWE-269

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

net/netfilter/nf_dup_netdev.c in the Linux kernel 5.4 through 5.6.10 allows local users to gain privileges because of a heap out-of-bounds write. This is related to nf_tables_offload.

Timeline

dates in UTC
  1. 2022-02-2415:15CVE publishedNVD

Versions per branch

NVD
Linux linux kernel
BranchAffectedFixed in
5.16≥ 5.16, < 5.16.125.16.12
5.x≥ 5.11, < 5.15.265.15.26
5.x≥ 5.5, < 5.10.1035.10.103
5.4≥ 5.4, < 5.4.1825.4.182
Debian debian linux
BranchAffectedFixed in
11.0= 11.0no fix published
Netapp h300e
BranchAffectedFixed in
—all versionsno fix published

10 more products in the sources.

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • dtb-aarch64openSUSE:Leap 15.3all versions · fixed in 5.3.18-150300.59.60.4and 11 other packages
  • kernelTuxCare:CentOS:8.5all versions · fixed in 4.18.0-348.7.1.el8_5.tuxcare.els8and 21 other packages
  • kernelTuxCare:CentOS:8.4all versions · fixed in 4.18.0-305.25.1.el8_4.tuxcare.els8and 21 other packages
  • kernelRocky Linux:8all versions · fixed in 0:4.18.0-348.23.1.el8_5
  • kernelRed Hat:rhel_eus:8.4::baseosall versions · fixed in 0:4.18.0-305.45.1.el8_4and 32 other packages
  • kernelRed Hat:enterprise_linux:8::baseosall versions · fixed in 0:4.18.0-348.23.1.el8_5and 32 other packages
  • kernelMageia:8all versions · fixed in 5.15.25-1.mga8
  • kernel-64kbSUSE:Linux Enterprise Module for Basesystem 15 SP3all versions · fixed in 5.3.18-150300.59.60.4and 4 other packages

112 more package ranges on OSV.dev

Vendor advisories

  • CVE-2022-25636 Red Hat Product Security428 products fixed

    kernel: heap out of bounds write in nf_dup_netdev.c

  • RHSA-2022:4896 Red Hat Product Security2 products fixed

    Red Hat Security Advisory: Red Hat Virtualization security, bug fix, and enhancement update [ovirt-4.5.0]

  • RHSA-2022:1550 Red Hat Product Security120 products fixed

    Red Hat Security Advisory: kernel security and bug fix update

  • RHSA-2022:1535 Red Hat Product Security35 products fixed

    Red Hat Security Advisory: kpatch-patch security update

  • RHSA-2022:1555 Red Hat Product Security30 products fixed

    Red Hat Security Advisory: kernel-rt security and bug fix update

  • RHSA-2022:1455 Red Hat Product Security120 products fixed

    Red Hat Security Advisory: kernel security, bug fix, and enhancement update

2 more advisories

Full record on NVD

Fix

  1. Update Linux linux kernel to 5.16.12 · 5.15.26 · 5.10.103 · 5.4.182
  2. Vendor fix Red Hat Product Security RHSA-2022:4896 · 2 productsFor details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/2974891
  3. Vendor fix Red Hat Product Security RHSA-2022:1550 · 120 productsFor details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 The system must be rebooted for this update to take effect.
  4. Vendor fix Red Hat Product Security RHSA-2022:1535 · 35 productsFor details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258
  5. Workaround from the vendor Red Hat Product Security RHSA-2022:4896 · 23 productsThe mitigation for the Red Hat Enterprise Linux 8 is to disable for unprivileged user possibilities of running unshare(CLONE_NEWUSER) or unshare(CLONE_NEWNET) that could be done with the next command: echo 0 > /proc/sys/user/max_user_namespaces For making this change in configuration permanent. No…

Advisories and patches

Detection

read 2026-11-01 01:02 UTC
Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Published
2022-02-24
Last Modified
2026-06-17
NVD status
Modified
GitHub Advisory
GHSA-44m9-c2jp-x4c5

Frequently asked questions

What is CVE-2022-25636?

net/netfilter/nf_dup_netdev.c in the Linux kernel 5.4 through 5.6.10 allows local users to gain privileges because of a heap out-of-bounds write. This is related to nf_tables_offload.

Is CVE-2022-25636 actively exploited?

Active exploitation of CVE-2022-25636 has not been confirmed. Its EPSS score was 2.6% on 2026-11-08, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2022-25636?

CVE-2022-25636 has a CVSS v3 base score of 7.8 (HIGH severity), with vector string CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Running Linux kernel? Hear about its next vulnerability

Surveillance reads the versions in your stack — a domain, a lockfile or a list — checks each CVE against the ranges its sources publish, and alerts you when one you run is exploited or enters CISA KEV. A version it cannot read stays « version not verified ».

Get alerts for this productCISA KEV additions, November 2026Search CVEs

No credit card required · No monthly cap on website lookups · 250 API requests/month

Go further

Related vulnerabilities

Same product first, then the same vendor advisory and the same publication week.

Back to CVE Database

Sources for this record