Use-after-free in Linux kernel - CVE-2026-99282
Published: November 8, 2026
Vulnerability identifier: #VU161901
CSH Severity: Low
CVSS v4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-99282
CWE-ID: CWE-416
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to cause a denial of service through access to freed kernel memory.
The vulnerability exists due to use-after-free in the Linux kernel's teql_master_xmit() function when a slave consumes and frees a packet but returns NET_XMIT_DROP rather than NETDEV_TX_OK. A local user can send a packet through a configured TEQL device with a VLAN slave whose lower queueing discipline drops the packet to trigger further access to the freed packet buffer, potentially causing a kernel crash.
Affected software
Linux kernel
How to mitigate CVE-2026-99282
Install security update from vendor's repository.