CVE-2026-43103 json
net: lapbether: handle NETDEV_PRE_TYPE_CHANGE
published 2026-05-06 6 mo ago modified 2026-06-17 4 mo ago also EUVD-2026-27616
- cvss
- 5.5
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.1%
- EPSS 0.1% chance of exploitation in 30 days, percentile 2%
- public exploits
- 0
- none known
Summary
In the Linux kernel, the following vulnerability has been resolved:
net: lapbether: handle NETDEV_PRE_TYPE_CHANGE
lapbeth_data_transmit() expects the underlying device type to be ARPHRD_ETHER.
Returning NOTIFY_BAD from lapbeth_device_event() makes sure bonding driver can not break this expectation.
Patch / fix
- Linux Linux 5.10.258, 5.15.209, 6.1.175, 6.6.136, 6.12.83, 6.18.24, 6.19.14, 7.0
- linux Debian 12 6.1.176-1
- linux Debian 13 6.12.85-1
- linux Debian 14 6.19.14-1
debian advisories DEBIAN-CVE-2026-43103
- linux Ubuntu 22.04 LTS 5.15.0-186.196
- linux Ubuntu 24.04 LTS 6.8.0-136.136
- linux-aws Ubuntu 22.04 LTS 5.15.0-1112.119
- linux-aws Ubuntu 24.04 LTS 6.8.0-1061.64
- linux-gcp Ubuntu 22.04 LTS 5.15.0-1112.122
- linux-gcp Ubuntu 24.04 LTS 6.8.0-1064.72
- linux-gke Ubuntu 22.04 LTS 5.15.0-1108.114
- linux-gke Ubuntu 24.04 LTS 6.8.0-1059.67
ubuntu advisories UBUNTU-CVE-2026-43103
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
- git.kernel.org/stable/c/698642a01d53107ce9b3fc08bd801284af478a2b commit
- git.kernel.org/stable/c/ffc5ed59f6dc87c51e8775f002619310225742e8 commit
- git.kernel.org/stable/c/a10570973619cba9dfa6d723177251b846fae587 commit
- git.kernel.org/stable/c/363a38044b8cd5b496d241651a1fb666e7c5fe3e commit
- git.kernel.org/stable/c/328bb2cff5c2ed973f595ded769e15f4b7a117be commit
- git.kernel.org/stable/c/63851f60781aa89258c8f0952cd13940aab0888e commit
- git.kernel.org/stable/c/b117056768ab7deb434e7d72065e48d2083a0c2a commit
- git.kernel.org/stable/c/b120e4432f9f56c7103133d6a11245e617695adb commit
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-2026-43103 updated
kernel: net: lapbether: handle NETDEV_PRE_TYPE_CHANGE
-
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 Red Hat Enterprise Linux 10 kernelnot 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
Exploit prediction
0.12% chance of exploitation in the next 30 days, higher than 2% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
Affected products
- Linux Linux
Classification
- Technology feeds
References
- git.kernel.org /stable/c/698642a01d53107ce9b3fc08bd801284af478a2b
- git.kernel.org /stable/c/ffc5ed59f6dc87c51e8775f002619310225742e8
- git.kernel.org /stable/c/a10570973619cba9dfa6d723177251b846fae587
-
git.kernel.org
/stable/c/363a38044b8cd5b496d241651a1fb666e7c5fe3e
patch
-
git.kernel.org
/stable/c/328bb2cff5c2ed973f595ded769e15f4b7a117be
patch
-
git.kernel.org
/stable/c/63851f60781aa89258c8f0952cd13940aab0888e
patch
-
git.kernel.org
/stable/c/b117056768ab7deb434e7d72065e48d2083a0c2a
patch
-
git.kernel.org
/stable/c/b120e4432f9f56c7103133d6a11245e617695adb
patch
Sources
- CVE List CVE-2026-43103
- NVD CVE-2026-43103
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.