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CVE-2022-50628— drm/gud: Fix UBSAN warning

EPSS 0.02% · P6
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I. Basic Information for CVE-2022-50628

Vulnerability Information
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Vulnerability Title
drm/gud: Fix UBSAN warning
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: drm/gud: Fix UBSAN warning UBSAN complains about invalid value for bool: [ 101.165172] [drm] Initialized gud 1.0.0 20200422 for 2-3.2:1.0 on minor 1 [ 101.213360] gud 2-3.2:1.0: [drm] fb1: guddrmfb frame buffer device [ 101.213426] usbcore: registered new interface driver gud [ 101.989431] ================================================================================ [ 101.989441] UBSAN: invalid-load in linux/include/linux/iosys-map.h:253:9 [ 101.989447] load of value 121 is not a valid value for type '_Bool' [ 101.989451] CPU: 1 PID: 455 Comm: kworker/1:6 Not tainted 5.18.0-rc5-gud-5.18-rc5 #3 [ 101.989456] Hardware name: Hewlett-Packard HP EliteBook 820 G1/1991, BIOS L71 Ver. 01.44 04/12/2018 [ 101.989459] Workqueue: events_long gud_flush_work [gud] [ 101.989471] Call Trace: [ 101.989474] <TASK> [ 101.989479] dump_stack_lvl+0x49/0x5f [ 101.989488] dump_stack+0x10/0x12 [ 101.989493] ubsan_epilogue+0x9/0x3b [ 101.989498] __ubsan_handle_load_invalid_value.cold+0x44/0x49 [ 101.989504] dma_buf_vmap.cold+0x38/0x3d [ 101.989511] ? find_busiest_group+0x48/0x300 [ 101.989520] drm_gem_shmem_vmap+0x76/0x1b0 [drm_shmem_helper] [ 101.989528] drm_gem_shmem_object_vmap+0x9/0xb [drm_shmem_helper] [ 101.989535] drm_gem_vmap+0x26/0x60 [drm] [ 101.989594] drm_gem_fb_vmap+0x47/0x150 [drm_kms_helper] [ 101.989630] gud_prep_flush+0xc1/0x710 [gud] [ 101.989639] ? _raw_spin_lock+0x17/0x40 [ 101.989648] gud_flush_work+0x1e0/0x430 [gud] [ 101.989653] ? __switch_to+0x11d/0x470 [ 101.989664] process_one_work+0x21f/0x3f0 [ 101.989673] worker_thread+0x200/0x3e0 [ 101.989679] ? rescuer_thread+0x390/0x390 [ 101.989684] kthread+0xfd/0x130 [ 101.989690] ? kthread_complete_and_exit+0x20/0x20 [ 101.989696] ret_from_fork+0x22/0x30 [ 101.989706] </TASK> [ 101.989708] ================================================================================ The source of this warning is in iosys_map_clear() called from dma_buf_vmap(). It conditionally sets values based on map->is_iomem. The iosys_map variables are allocated uninitialized on the stack leading to ->is_iomem having all kinds of values and not only 0/1. Fix this by zeroing the iosys_map variables.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于gud驱动加载无效布尔值，可能导致UBSAN警告。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

VendorProductAffected VersionsCPESubscribe
LinuxLinux 40e1a70b4aedf2859a1829991b48ef0ebe650bf2 ~ 832f861a46039d50536dcfda0a9fb334b48d0f8b -
LinuxLinux 5.13 -

II. Public POCs for CVE-2022-50628

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III. Intelligence Information for CVE-2022-50628

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Same Patch Batch · Linux · 2025-12-08 · 82 CVEs total

CVE-2022-50630mm: hugetlb: fix UAF in hugetlb_handle_userfault
CVE-2023-53752net: deal with integer overflows in kmalloc_reserve()
CVE-2022-50626media: dvb-usb: fix memory leak in dvb_usb_adapter_init()
CVE-2022-50627wifi: ath11k: fix monitor mode bringup crash
CVE-2022-50625serial: amba-pl011: avoid SBSA UART accessing DMACR register
CVE-2022-50622ext4: fix potential memory leak in ext4_fc_record_modified_inode()
CVE-2022-50621dm: verity-loadpin: Only trust verity targets with enforcement
CVE-2022-50620f2fs: fix to invalidate dcc->f2fs_issue_discard in error path
CVE-2022-50619drm/amdkfd: Fix memory leak in kfd_mem_dmamap_userptr()
CVE-2022-50623fpga: prevent integer overflow in dfl_feature_ioctl_set_irq()
CVE-2022-50629wifi: rsi: Fix memory leak in rsi_coex_attach()
CVE-2023-53742kcsan: Avoid READ_ONCE() in read_instrumented_memory()
CVE-2023-53743PCI: Free released resource after coalescing
CVE-2023-53744soc: ti: pm33xx: Fix refcount leak in am33xx_pm_probe
CVE-2023-53745um: vector: Fix memory leak in vector_config
CVE-2023-53746s390/vfio-ap: fix memory leak in vfio_ap device driver
CVE-2023-53747vc_screen: reload load of struct vc_data pointer in vcs_write() to avoid UAF
CVE-2023-53748media: mediatek: vcodec: Fix potential array out-of-bounds in decoder queue_setup
CVE-2023-53750pinctrl: freescale: Fix a memory out of bounds when num_configs is 1
CVE-2023-53751cifs: fix potential use-after-free bugs in TCP_Server_Info::hostname

Showing top 20 of 82 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

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