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Fencer Vulns
high 7.8

CVE-2024-26723 json

lan966x: Fix crash when adding interface under a lag

published 2024-04-03 2 y ago modified 2026-06-17 4 mo ago also EUVD-2024-23985

cvss
7.8
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.2%
EPSS 0.2% chance of exploitation in 30 days, percentile 15%
public exploits
0
none known

Summary

In the Linux kernel, the following vulnerability has been resolved:

lan966x: Fix crash when adding interface under a lag

There is a crash when adding one of the lan966x interfaces under a lag interface. The issue can be reproduced like this: ip link add name bond0 type bond miimon 100 mode balance-xor ip link set dev eth0 master bond0

The reason is because when adding a interface under the lag it would go through all the ports and try to figure out which other ports are under that lag interface. And the issue is that lan966x can have ports that are NULL pointer as they are not probed. So then iterating over these ports it would just crash as they are NULL pointers. The fix consists in actually checking for NULL pointers before accessing something from the ports. Like we do in other places.

Patch / fix

  • Linux Linux 6.1.79, 6.6.18, 6.7.6, 6.8
  • linux linux_kernel 2a492f01228b, 6.1.79, 6.6.18, 6.76, 15faa1f67ab4, 48fae67d8374, b9357489c46c
  • linux Debian 12 6.1.82-1
  • linux Debian 14, Debian 13 6.7.7-1

debian advisories DEBIAN-CVE-2024-26723

  • linux-aws-6.5 Ubuntu 22.04 LTS 6.5.0-1023.23~22.04.1
  • linux-gcp-6.5 Ubuntu 22.04 LTS 6.5.0-1024.26~22.04.1
  • linux-hwe-6.5 Ubuntu 22.04 LTS 6.5.0-44.44~22.04.1
  • linux-oem-6.5 Ubuntu 22.04 LTS 6.5.0-1027.28
  • linux-azure-6.5 Ubuntu 22.04 LTS 6.5.0-1024.25~22.04.1
  • linux-nvidia-6.5 Ubuntu 22.04 LTS 6.5.0-1023.24
  • linux-oracle-6.5 Ubuntu 22.04 LTS 6.5.0-1026.26~22.04.1
  • linux-starfive-6.5 Ubuntu 22.04 LTS 6.5.0-1017.18~22.04.1

ubuntu advisories UBUNTU-CVE-2024-26723

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

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-2024-26723 updated cvss 4.4

kernel: lan966x: Fix crash when adding interface under a lag

  • Red Hat Enterprise Linux 6 perf, kernel, python-perf, kernel-kdump, kernel-firmware, kernel-bootwrapper, +1 more Red Hat Enterprise Linux 7 perf, kernel, bpftool, kernel-rt, python-perf, kernel-kdump, +8 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
total
Assessed
2 y ago

Exploit prediction

0.24% chance of exploitation in the next 30 days, higher than 15% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

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

  • Linux Linux
  • linux linux_kernel

Classification

Weakness
  • CWE-400 Uncontrolled Resource Consumption
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.