In the Linux kernel, the following vulnerability has been resolved: drm/bridge: sii902x: Fix probing race issue A null pointer dereference crash has been observed rarely on TI platforms using sii9022 bridge: [ 53.271356] sii902x_get_edid+0x34/0x70 [sii902x] [ 53.276066] sii902x_bridge_get_edid+0x14/0x20 [sii902x] [ 53.281381] drm_bridge_get_edid+0x20/0x34 [drm] [ 53.286305] drm_bridge_connector_get_modes+0x8c/0xcc [drm_kms_helper] [ 53.292955] drm_helper_probe_single_connector_modes+0x190/0x538 [drm_kms_helper] [ 53.300510] drm_client_modeset_probe+0x1f0/0xbd4 [drm] [ 53.305958] __drm_fb_helper_initial_config_and_unlock+0x50/0x510 [drm_kms_helper] [ 53.313611] drm_fb_helper_initial_config+0x48/0x58 [drm_kms_helper] [ 53.320039] drm_fbdev_dma_client_hotplug+0x84/0xd4 [drm_dma_helper] [ 53.326401] drm_client_register+0x5c/0xa0 [drm] [ 53.331216] drm_fbdev_dma_setup+0xc8/0x13c [drm_dma_helper] [ 53.336881] tidss_probe+0x128/0x264 [tidss] [ 53.341174] platform_probe+0x68/0xc4 [ 53.344841] really_probe+0x188/0x3c4 [ 53.348501] __driver_probe_device+0x7c/0x16c [ 53.352854] driver_probe_device+0x3c/0x10c [ 53.357033] __device_attach_driver+0xbc/0x158 [ 53.361472] bus_for_each_drv+0x88/0xe8 [ 53.365303] __device_attach+0xa0/0x1b4 [ 53.369135] device_initial_probe+0x14/0x20 [ 53.373314] bus_probe_device+0xb0/0xb4 [ 53.377145] deferred_probe_work_func+0xcc/0x124 [ 53.381757] process_one_work+0x1f0/0x518 [ 53.385770] worker_thread+0x1e8/0x3dc [ 53.389519] kthread+0x11c/0x120 [ 53.392750] ret_from_fork+0x10/0x20 The issue here is as follows: - tidss probes, but is deferred as sii902x is still missing. - sii902x starts probing and enters sii902x_init(). - sii902x calls drm_bridge_add(). Now the sii902x bridge is ready from DRM's perspective. - sii902x calls sii902x_audio_codec_init() and platform_device_register_data() - The registration of the audio platform device causes probing of the deferred devices. - tidss probes, which eventually causes sii902x_bridge_get_edid() to be called. - sii902x_bridge_get_edid() tries to use the i2c to read the edid. However, the sii902x driver has not set up the i2c part yet, leading to the crash. Fix this by moving the drm_bridge_add() to the end of the sii902x_init(), which is also at the very end of sii902x_probe().

ID	Name	Product	Family	Severity
195118	Ubuntu 22.04 LTS : Linux kernel (OEM) vulnerabilities (USN-6765-1)	Nessus	Ubuntu Local Security Checks	high
194886	SUSE SLED15 / SLES15 / openSUSE 15 Security Update : kernel (SUSE-SU-2024:1480-1)	Nessus	SuSE Local Security Checks	high
194745	SUSE SLES15 / openSUSE 15 Security Update : kernel (SUSE-SU-2024:1466-1)	Nessus	SuSE Local Security Checks	high
193454	SUSE SLES15 / openSUSE 15 Security Update : kernel (SUSE-SU-2024:1322-1)	Nessus	SuSE Local Security Checks	high
192490	SUSE SLES15 Security Update : kernel (SUSE-SU-2024:0977-1)	Nessus	SuSE Local Security Checks	high
192487	SUSE SLES15 Security Update : kernel (SUSE-SU-2024:0926-1)	Nessus	SuSE Local Security Checks	high
192178	SUSE SLES15 Security Update : kernel (SUSE-SU-2024:0900-2)	Nessus	SuSE Local Security Checks	high
192141	SUSE SLES15 Security Update : kernel (SUSE-SU-2024:0900-1)	Nessus	SuSE Local Security Checks	high
192014	SUSE SLES15 Security Update : kernel (SUSE-SU-2024:0857-1)	Nessus	SuSE Local Security Checks	high
192006	SUSE SLES15 / openSUSE 15 Security Update : kernel (SUSE-SU-2024:0855-1)	Nessus	SuSE Local Security Checks	high

Detections

Analytics

CVE-2024-26607

medium

Tenable Plugins

high

high

high

high

high

high

high

high

high

high