NULL Pointer Dereference The advisory has been revoked - it doesn't affect any version of package kernel-cross-headers (opens in a new tab)
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Start learning- Snyk IDSNYK-CENTOS9-KERNELCROSSHEADERS-9927166
- published2 May 2025
- disclosed1 May 2025
Introduced: 1 May 2025
CVE-2022-49827 (opens in a new tab)Amendment
The Centos security team deemed this advisory irrelevant for Centos:9.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kernel-cross-headers package and not the kernel-cross-headers package as distributed by Centos.
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
References
- https://access.redhat.com/security/cve/CVE-2022-49827
- https://git.kernel.org/stable/c/1d160dfb3fdf11ba9447e862c548447f91f4e74a
- https://git.kernel.org/stable/c/3acd2016421b2e628acad65495d15493bf7a3bc3
- https://git.kernel.org/stable/c/4979524f5a2a8210e87fde2f642b0dc060860821
- https://git.kernel.org/stable/c/e884a6c2d49a6c12761e5bed851e9fe93bd923a1