Improper access control in Linux kernel - CVE-2026-98822

Vulnerability identifier: #VU157190

CSH Severity: Low

CVSS v4: 4.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N]

CVE-ID: CVE-2026-98822

CWE-ID: CWE-284

Exploitation vector: Local access

Exploit availability: No public exploit available

The vulnerability allows a local user to bypass VLAN isolation and potentially disclose network traffic to a station on a different VLAN within the same basic service set (BSS).

The vulnerability exists due to improper access control in the Linux kernel mac80211 function ieee80211_lookup_ra_sta() when resolving destination stations for AP and AP VLAN unicast frames. A local user can submit a unicast frame on one interface addressed to a station on another VLAN in the same BSS to cause unauthorized cross-VLAN delivery, because the station lookup searches across the BSS rather than restricting matches to the transmitting interface.

Linux kernel
SUSE Linux Micro
SUSE Linux Micro Extras
kernel-default
kernel-64kb
kernel-64kb-debugsource
kernel-64kb-devel
kernel-default-devel
kernel-syms
kernel-obs-build
kernel-obs-build-debugsource
kernel-default-debugsource
kernel-default-devel-debuginfo

Install security update from vendor's repository.

Linux kernel - update to 7.0 rc3
kernel-default - update to 6.4.0-159998.55.1
kernel-64kb - update to 6.4.0-159998.55.1
kernel-64kb-debugsource - update to 6.4.0-159998.55.1
kernel-64kb-devel - update to 6.4.0-159998.55.1
kernel-default-devel - update to 6.4.0-159998.55.1
kernel-syms - update to 6.4.0-159998.55.1
kernel-obs-build - update to 6.4.0-159998.55.1
kernel-obs-build-debugsource - update to 6.4.0-159998.55.1
kernel-default-debugsource - update to 6.4.0-159998.55.1
kernel-default-devel-debuginfo - update to 6.4.0-159998.55.1

• https://git.kernel.org/stable/c/2fe08c8ff26841430a3c98ab755337325b5d47b5
• https://git.kernel.org/stable/c/7f93ca31f7fd9b42e7d692f59514436d448ac908
• https://git.kernel.org/stable/c/88e96d902efeefbffc34450969f40dc61a0c8a42
• https://git.kernel.org/stable/c/ad61b9a5febb42e4b96df8d30ad76ddc36dda9d0
• https://git.kernel.org/stable/c/fd875e24e8f2b202e3636b3ef8e6060874eca0e5

• Improper access control in Linux kernel mac80211
• SUSE update for the Linux Kernel