CVE-2021-47471

MediumCVSS 5.5/10Last modified Jun 17, 2026

Description

In the Linux kernel, the following vulnerability has been resolved:

drm: mxsfb: Fix NULL pointer dereference crash on unload

The mxsfb->crtc.funcs may already be NULL when unloading the driver, in which case calling mxsfb_irq_disable() via drm_irq_uninstall() from mxsfb_unload() leads to NULL pointer dereference.

Since all we care about is masking the IRQ and mxsfb->base is still valid, just use that to clear and mask the IRQ.

Metrics

CVSS 3.1 5.5/10CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Weakness enumeration

CWE-476

Affected software

No affected versions have been published.

Timeline

Published
May 22, 2024
Last modified
Jun 17, 2026
NVD status
Analyzed

Related CVEs from 2021

CVE-2021-474735.5In the Linux kernel, the following vulnerability has been resolved: scsi: qla2xxx: Fix a memory leak in an error path of qla2x00_process_elCVE-2021-474747.8In the Linux kernel, the following vulnerability has been resolved: comedi: vmk80xx: fix bulk-buffer overflow The driver is using endpointCVE-2021-474757.8In the Linux kernel, the following vulnerability has been resolved: comedi: vmk80xx: fix transfer-buffer overflows The driver uses endpoinCVE-2021-474764.6In the Linux kernel, the following vulnerability has been resolved: comedi: ni_usb6501: fix NULL-deref in command paths The driver uses enCVE-2021-474777.8In the Linux kernel, the following vulnerability has been resolved: comedi: dt9812: fix DMA buffers on stack USB transfer buffers are typiCVE-2021-474789.1In the Linux kernel, the following vulnerability has been resolved: isofs: Fix out of bound access for corrupted isofs image When isofs imCVE-2021-474797.0In the Linux kernel, the following vulnerability has been resolved: staging: rtl8712: fix use-after-free in rtl8712_dl_fw Syzbot reported CVE-2021-474805.5In the Linux kernel, the following vulnerability has been resolved: scsi: core: Put LLD module refcnt after SCSI device is released SCSI hCVE-2021-474815.5In the Linux kernel, the following vulnerability has been resolved: RDMA/mlx5: Initialize the ODP xarray when creating an ODP MR Normally CVE-2021-474825.3In the Linux kernel, the following vulnerability has been resolved: net: batman-adv: fix error handling Syzbot reported ODEBUG warning in CVE-2021-474837.8In the Linux kernel, the following vulnerability has been resolved: regmap: Fix possible double-free in regcache_rbtree_exit() In regcacheCVE-2021-474845.5In the Linux kernel, the following vulnerability has been resolved: octeontx2-af: Fix possible null pointer dereference. This patch fixes
CVE-2021-47471: Medium severity, CVSS 5.5 | Vulnix