CVE-2026-23471 Detail
Received
This CVE record has recently been published to the CVE List and has been included within the NVD dataset. DescriptionIn the Linux kernel, the following vulnerability has been resolved: drm: Fix use-after-free on framebuffers and property blobs when calling drm_dev_unplug When trying to do a rather aggressive test of igt's "xe_module_load --r reload" with a full desktop environment and game running I noticed a few OOPSes when dereferencing freed pointers, related to framebuffers and property blobs after the compositor exits. Solve this by guarding the freeing in drm_file with drm_dev_enter/exit, and immediately put the references from struct drm_file objects during drm_dev_unplug(). Related warnings for framebuffers on the subtest: [ 739.713076] ------------[ cut here ]------------ WARN_ON(!list_empty(&dev->mode_config.fb_list)) [ 739.713079] WARNING: drivers/gpu/drm/drm_mode_config.c:584 at drm_mode_config_cleanup+0x30b/0x320 [drm], CPU#12: xe_module_load/13145 .... [ 739.713328] Call Trace: [ 739.713330] <TASK> [ 739.713335] ? intel_pmdemand_destroy_state+0x11/0x20 [xe] [ 739.713574] ? intel_atomic_global_obj_cleanup+0xe4/0x1a0 [xe] [ 739.713794] intel_display_driver_remove_noirq+0x51/0xb0 [xe] [ 739.714041] xe_display_fini_early+0x33/0x50 [xe] [ 739.714284] devm_action_release+0xf/0x20 [ 739.714294] devres_release_all+0xad/0xf0 [ 739.714301] device_unbind_cleanup+0x12/0xa0 [ 739.714305] device_release_driver_internal+0x1b7/0x210 [ 739.714311] device_driver_detach+0x14/0x20 [ 739.714315] unbind_store+0xa6/0xb0 [ 739.714319] drv_attr_store+0x21/0x30 [ 739.714322] sysfs_kf_write+0x48/0x60 [ 739.714328] kernfs_fop_write_iter+0x16b/0x240 [ 739.714333] vfs_write+0x266/0x520 [ 739.714341] ksys_write+0x72/0xe0 [ 739.714345] __x64_sys_write+0x19/0x20 [ 739.714347] x64_sys_call+0xa15/0xa30 [ 739.714355] do_syscall_64+0xd8/0xab0 [ 739.714361] entry_SYSCALL_64_after_hwframe+0x4b/0x53 and [ 739.714459] ------------[ cut here ]------------ [ 739.714461] xe 0000:67:00.0: [drm] drm_WARN_ON(!list_empty(&fb->filp_head)) [ 739.714464] WARNING: drivers/gpu/drm/drm_framebuffer.c:833 at drm_framebuffer_free+0x6c/0x90 [drm], CPU#12: xe_module_load/13145 [ 739.714715] RIP: 0010:drm_framebuffer_free+0x7a/0x90 [drm] ... [ 739.714869] Call Trace: [ 739.714871] <TASK> [ 739.714876] drm_mode_config_cleanup+0x26a/0x320 [drm] [ 739.714998] ? __drm_printfn_seq_file+0x20/0x20 [drm] [ 739.715115] ? drm_mode_config_cleanup+0x207/0x320 [drm] [ 739.715235] intel_display_driver_remove_noirq+0x51/0xb0 [xe] [ 739.715576] xe_display_fini_early+0x33/0x50 [xe] [ 739.715821] devm_action_release+0xf/0x20 [ 739.715828] devres_release_all+0xad/0xf0 [ 739.715843] device_unbind_cleanup+0x12/0xa0 [ 739.715850] device_release_driver_internal+0x1b7/0x210 [ 739.715856] device_driver_detach+0x14/0x20 [ 739.715860] unbind_store+0xa6/0xb0 [ 739.715865] drv_attr_store+0x21/0x30 [ 739.715868] sysfs_kf_write+0x48/0x60 [ 739.715873] kernfs_fop_write_iter+0x16b/0x240 [ 739.715878] vfs_write+0x266/0x520 [ 739.715886] ksys_write+0x72/0xe0 [ 739.715890] __x64_sys_write+0x19/0x20 [ 739.715893] x64_sys_call+0xa15/0xa30 [ 739.715900] do_syscall_64+0xd8/0xab0 [ 739.715905] entry_SYSCALL_64_after_hwframe+0x4b/0x53 and then finally file close blows up: [ 743.186530] Oops: general protection fault, probably for non-canonical address 0xdead000000000122: 0000 [#1] SMP [ 743.186535] CPU: 3 UID: 1000 PID: 3453 Comm: kwin_wayland Tainted: G W 7.0.0-rc1-valkyria+ #110 PREEMPT_{RT,(lazy)} [ 743.186537] Tainted: [W]=WARN [ 743.186538] Hardware name: Gigabyte Technology Co., Ltd. X299 AORUS Gaming 3/X299 AORUS Gaming 3-CF, BIOS F8n 12/06/2021 [ 743.186539] RIP: 0010:drm_framebuffer_cleanup+0x55/0xc0 [drm] [ 743.186588] Code: d8 72 73 0f b6 42 05 ff c3 39 c3 72 e8 49 8d bd 50 07 00 00 31 f6 e8 3a 80 d3 e1 49 8b 44 24 10 49 8d 7c 24 08 49 8b 54 24 08 <48> 3b 38 0f 85 95 7f 02 00 48 3b 7a 08 0f 85 8b 7f 02 00 48 89 42 [ 743.186589] RSP: 0018:ffffc900085e3cf8 EFLAGS: 00 ---truncated--- Metrics
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Quick InfoCVE Dictionary Entry:CVE-2026-23471 NVD Published Date: 04/03/2026 NVD Last Modified: 04/03/2026 Source: kernel.org |
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