UBUNTU-CVE-2026-92493: Null Pointer Dereference
In the Linux kernel, the following vulnerability has been resolved: cpufreq: amd-pstate-ut: Skip tests when amd-pstate driver is not active The crash issue may occur when modprobe amdpstateut on intel platform. amdpstateut: 1 amdpstateutacpicpcvalid success! amdpstateut: 2 amdpstateutcheckenabled success! BUG: kernel NULL pointer dereference, address: 0000000000000080 #PF: supervisor read access in kernel mode #PF: errorcode(0x0000) - not-present page PGD 0 P4D 0 Oops: 0000 [#1] SMP NOPTI CPU: 0 PID: 20300 Comm: modprobe Kdump: loaded Tainted: G O 6.6.0-0010.rc1.ctl4.x8664 #1 Hardware name: FiberHome R2200 V5/Xeon Boards, BIOS 3.1a 02/24/2020 RIP: 0010:amdpstateutcheckperf+0x141/0x280 [amdpstateut] Call Trace: <TASK> amdpstateutinit+0x1b/0xff0 [amdpstateut] ? pfxamdpstateutinit+0x10/0x10 [amdpstateut] dooneinitcall+0x42/0x2e0 ? kmalloctrace+0x26/0x90 doinitmodule+0x60/0x240 sesysinitmodule+0x185/0x1c0 dosyscall64+0x62/0x190 entrySYSCALL64afterhwframe+0x76/0x7e </TASK> Add state detection to amd pstate driver to prevent amdpstateut driver from testing on non-AMD platforms. (ML: adjust title)
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Compensating control
Add state detection to the amd-pstate driver so amd_pstate_ut tests are skipped when the amd-pstate driver is not active, preventing amd_pstate_ut from running on non-AMD platforms.