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Fencer Vulns
medium 6.6

CVE-2023-3106 json

Kernel: netlink socket crash (null pointer deref) in netlink_dump function

published 2023-07-12 3 y ago modified 2026-11-07 2 d ago also EUVD-2023-43793

cvss
6.6
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.3%
EPSS 0.3% chance of exploitation in 30 days, percentile 21%
public exploits
0
none known

Summary

A NULL pointer dereference vulnerability was found in netlink_dump. This issue can occur when the Netlink socket receives the message(sendmsg) for the XFRM_MSG_GETSA, XFRM_MSG_GETPOLICY type message, and the DUMP flag is set and can cause a denial of service or possibly another unspecified impact. Due to the nature of the flaw, privilege escalation cannot be fully ruled out, although it is unlikely.

Patch / fix

  • linux linux_kernel 3.16.39, 4.4.223, 4.7.10
  • linux Debian 14, Debian 13, Debian 12 4.8.5-1

debian advisories DEBIAN-CVE-2023-3106

  • linux Ubuntu 16.04 LTS 4.4.0-184.214
  • linux-aws Ubuntu 16.04 LTS 4.4.0-1109.120
  • linux-kvm Ubuntu 16.04 LTS 4.4.0-1075.82
  • linux-aws Ubuntu Pro 14.04 LTS 4.4.0-1073.77
  • linux-fips Ubuntu Pro FIPS-updates 16.04 LTS 4.4.0-1041.46
  • linux-lts-xenial Ubuntu Pro 14.04 LTS 4.4.0-184.214~14.04.1

ubuntu advisories UBUNTU-CVE-2023-3106

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • kernel-syms SLES 12 SP2-BCL 4.4.121-92.208.1
  • kernel-source SLES 12 SP2-BCL 4.4.121-92.208.1
  • kernel-default SLES 12 SP2-BCL 4.4.121-92.208.1

suse advisories SUSE-SU-2023:3324-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2023-3106 updated cvss 6.6

kernel: Netlink socket crash (null pointer deref) in netlink_dump function

  • Red Hat Enterprise Linux 7 perf, kernel, bpftool, kernel-rt, python-perf, kernel-kdump, +8 more
    affected: no fix planned “Out of support scope”
  • Red Hat Enterprise Linux 6 perf, kernel, python-perf, kernel-kdump, kernel-firmware, kernel-bootwrapper, +1 more Red Hat Enterprise Linux 8 perf, kernel, bpftool, kernel-rt, kernel-core, kernel-tools, +29 more Red Hat Enterprise Linux 9 rv, perf, rtla, kernel, bpftool, libperf, +83 more
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
2 y ago

Exploit prediction

0.29% chance of exploitation in the next 30 days, higher than 21% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 6.6 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:H
NVD 3.1 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

  • Red Hat Red Hat Enterprise Linux 6
  • Red Hat Red Hat Enterprise Linux 7
  • Red Hat Red Hat Enterprise Linux 8
  • Red Hat Red Hat Enterprise Linux 9

Classification

Weakness
Technology feeds

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.