CVE-2021-47652— video: fbdev: smscufx: Fix null-ptr-deref in ufx_usb_probe()
Affected Version Matrix 20
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Linux | Linux | 3c8a63e22a0802fd56380f6ab305b419f18eb6f5< d1b6a1f0c23b7164250479bf92e2893291dca539 | affected |
3c8a63e22a0802fd56380f6ab305b419f18eb6f5< 0fd28daec73525382e5c992db8743bf76e42cd5c | affected | ||
3c8a63e22a0802fd56380f6ab305b419f18eb6f5< dd3a6cc7385b89ec2303f39dfc3bafa4e24cec4b | affected | ||
3c8a63e22a0802fd56380f6ab305b419f18eb6f5< da8b269cc0a2526ebeaccbe2484c999eb0f822cf | affected | ||
3c8a63e22a0802fd56380f6ab305b419f18eb6f5< 64ec3e678d76419f207b9cdd338dda438ca10b1c | affected | ||
3c8a63e22a0802fd56380f6ab305b419f18eb6f5< c420b540db4b5d69de0a36d8b9d9a6a79a04f05a | affected | ||
3c8a63e22a0802fd56380f6ab305b419f18eb6f5< d396c651e2b508b6179bb678cc029f3becbf5170 | affected | ||
3c8a63e22a0802fd56380f6ab305b419f18eb6f5< 9280ef235b05e8f19f8bc6d547b992f0a0ef398d | affected | ||
| … +12 more rows | |||
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I. Basic Information for CVE-2021-47652
Vulnerability Information
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Vulnerability Title
video: fbdev: smscufx: Fix null-ptr-deref in ufx_usb_probe()
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: video: fbdev: smscufx: Fix null-ptr-deref in ufx_usb_probe() I got a null-ptr-deref report: BUG: kernel NULL pointer dereference, address: 0000000000000000 ... RIP: 0010:fb_destroy_modelist+0x38/0x100 ... Call Trace: ufx_usb_probe.cold+0x2b5/0xac1 [smscufx] usb_probe_interface+0x1aa/0x3c0 [usbcore] really_probe+0x167/0x460 ... ret_from_fork+0x1f/0x30 If fb_alloc_cmap() fails in ufx_usb_probe(), fb_destroy_modelist() will be called to destroy modelist in the error handling path. But modelist has not been initialized yet, so it will result in null-ptr-deref. Initialize modelist before calling fb_alloc_cmap() to fix this bug.
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，该漏洞源于未初始化modelist导致空指针取消引用。
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
II. Public POCs for CVE-2021-47652
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|---|
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Patches & Fixes for CVE-2021-47652 (9)
Same Patch Batch · Linux · 2025-02-26 · 706 CVEs total
| CVE-2022-49498 | ALSA: pcm: Check for null pointer of pointer substream before dereferencing it | |
| CVE-2022-49486 | ASoC: fsl: Fix refcount leak in imx_sgtl5000_probe | |
| CVE-2022-49488 | drm/msm/mdp5: Return error code in mdp5_mixer_release when deadlock is detected | |
| CVE-2022-49489 | drm/msm/disp/dpu1: set vbif hw config to NULL to avoid use after memory free during pm run | |
| CVE-2022-49490 | drm/msm/mdp5: Return error code in mdp5_pipe_release when deadlock is detected | |
| CVE-2022-49491 | drm/rockchip: vop: fix possible null-ptr-deref in vop_bind() | |
| CVE-2022-49492 | nvme-pci: fix a NULL pointer dereference in nvme_alloc_admin_tags | |
| CVE-2022-49493 | ASoC: rt5645: Fix errorenous cleanup order | |
| CVE-2022-49494 | mtd: rawnand: cadence: fix possible null-ptr-deref in cadence_nand_dt_probe() | |
| CVE-2022-49495 | drm/msm/hdmi: check return value after calling platform_get_resource_byname() | |
| CVE-2022-49497 | net: remove two BUG() from skb_checksum_help() | |
| CVE-2022-49496 | media: mediatek: vcodec: prevent kernel crash when rmmod mtk-vcodec-dec.ko | |
| CVE-2022-49502 | media: rga: fix possible memory leak in rga_probe | |
| CVE-2022-49507 | regulator: da9121: Fix uninit-value in da9121_assign_chip_model() | |
| CVE-2022-49508 | HID: elan: Fix potential double free in elan_input_configured | |
| CVE-2022-49506 | drm/mediatek: Add vblank register/unregister callback functions | |
| CVE-2022-49504 | scsi: lpfc: Inhibit aborts if external loopback plug is inserted | |
| CVE-2022-49505 | NFC: NULL out the dev->rfkill to prevent UAF | |
| CVE-2022-49501 | usbnet: Run unregister_netdev() before unbind() again | |
| CVE-2022-49500 | wl1251: dynamically allocate memory used for DMA |
Showing top 20 of 706 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
Same product: Linux
- CVE-2026-46331
net/sched: fix pedit partial COW leading to page cache corru - CVE-2026-52907
media: rockchip: rkcif: fix off by one bugs - CVE-2026-52906
9p: fix access mode flags being ORed instead of replaced - CVE-2026-52905
mm/damon/core: disallow non-power of two min_region_sz on da - CVE-2026-52904
drm/nouveau: fix nvkm_device leak on aperture removal failur
Same vendor: Linux
- CVE-2026-46331
net/sched: fix pedit partial COW leading to page cache corru - CVE-2026-52907
media: rockchip: rkcif: fix off by one bugs - CVE-2026-52906
9p: fix access mode flags being ORed instead of replaced - CVE-2026-52905
mm/damon/core: disallow non-power of two min_region_sz on da - CVE-2026-52904
drm/nouveau: fix nvkm_device leak on aperture removal failur
V. Comments for CVE-2021-47652
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