In the Linux kernel, the following vulnerability has been resolved:
drm: Fix potential null-ptr-deref in drm_vblank_destroy_worker()
drm_vblank_init() call drmm_add_action_or_reset() with drm_vblank_init_release() as action. If __drmm_add_action() failed, will directly call drm_vblank_init_release() with the vblank whose worker is NULL. As the resule, a null-ptr-deref will happen in kthread_destroy_worker(). Add the NULL check before calling drm_vblank_destroy_worker().
BUG: null-ptr-deref KASAN: null-ptr-deref in range [0x0000000000000068-0x000000000000006f] CPU: 5 PID: 961 Comm: modprobe Not tainted 6.0.0-11331-gd465bff130bf-dirty RIP: 0010:kthread_destroy_worker+0x25/0xb0 Call Trace: <TASK> drm_vblank_init_release+0x124/0x220 [drm] ? drm_crtc_vblank_restore+0x8b0/0x8b0 [drm] __drmm_add_action_or_reset+0x41/0x50 [drm] drm_vblank_init+0x282/0x310 [drm] vkms_init+0x35f/0x1000 [vkms] ? 0xffffffffc4508000 ? lock_is_held_type+0xd7/0x130 ? __kmem_cache_alloc_node+0x1c2/0x2b0 ? lock_is_held_type+0xd7/0x130 ? 0xffffffffc4508000 do_one_initcall+0xd0/0x4f0 ... do_syscall_64+0x35/0x80 entry_SYSCALL_64_after_hwframe+0x46/0xb0
CVSS Details
- CVSS 3.1 Base Score: 5.5
- CVSS 3.1 Vector: (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Amazon Linux Ami 2 | — | Upgrade kernel-livepatch-5.15.86-53.137Upgrade bpftool-debuginfoUpgrade perfUpgrade kernel-toolsUpgrade perf-debuginfoUpgrade kernel-debuginfo-common-aarch64Upgrade python-perfUpgrade bpftoolUpgrade kernel-headersUpgrade kernel-tools-develUpgrade kernel-tools-debuginfoUpgrade kernel-debuginfo-common-x86_64Upgrade kernel-debuginfoUpgrade kernel-develUpgrade kernelUpgrade python-perf-debuginfoUpgrade kernel-livepatch-5.10.157-139.675 | Jun 23, 2025 | May 1, 2025 |
| Debian | — | Upgrade linux | May 5, 2025 | May 1, 2025 |
| Huawei Euleros 2_0_sp13 | — | Upgrade kernel-toolsUpgrade kernel-tools-libsUpgrade bpftoolUpgrade kernel-abi-stablelistsUpgrade python3-perfUpgrade kernel | Aug 13, 2025 | Aug 9, 2025 |
| Redhat_linux | — | No solution exists | Jul 9, 2025 | May 1, 2025 |
| Ubuntu | — | Upgrade linux-lowlatency-hwe-5.15Upgrade linux-gcp-5.15Upgrade linux-intel-iotgUpgrade linux-riscv-5.15Upgrade linux-awsUpgrade linux-gcpUpgrade linux-intel-iot-realtimeUpgrade linux-nvidia-tegra-5.15Upgrade linux-intel-iotg-5.15Upgrade linux-realtimeUpgrade linux-bluefieldUpgrade linux-raspiUpgrade linux-aws-5.15Upgrade linux-ibmUpgrade linuxUpgrade linux-oracle-5.15Upgrade linux-lowlatencyUpgrade linux-kvmUpgrade linux-azureUpgrade linux-hwe-5.15Upgrade linux-gkeUpgrade linux-oracleUpgrade linux-gkeopUpgrade linux-azure-5.15Upgrade linux-nvidia | May 8, 2025 | May 1, 2025 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | May 27, 2026 | May 1, 2025 |
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