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CVE-2021-47471— drm: mxsfb: Fix NULL pointer dereference crash on unload

AI Predicted 4.4 Difficulty: Theoretical EPSS 0.05% · P15

Affected Version Matrix 8

VendorProductVersion RangeStatus
LinuxLinuxae1ed0093281939b80664a687689f12436c0e874< f40c2281d2c0674d32ba732fee45222d76495472affected
ae1ed0093281939b80664a687689f12436c0e874< b0e6db0656ddfd8bb57303c2ef61ee1c1cc694a8affected
ae1ed0093281939b80664a687689f12436c0e874< 3cfc183052c3dbf8eae57b6c1685dab00ed3db4aaffected
5.10affected
< 5.10unaffected
5.10.76≤ 5.10.*unaffected
5.14.15≤ 5.14.*unaffected
5.15≤ *unaffected
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I. Basic Information for CVE-2021-47471

Vulnerability Information
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Vulnerability Title
drm: mxsfb: Fix NULL pointer dereference crash on unload
Source: NVD (National Vulnerability Database)
Vulnerability 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.
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

VendorProductAffected VersionsCPESubscribe
LinuxLinux ae1ed0093281939b80664a687689f12436c0e874 ~ f40c2281d2c0674d32ba732fee45222d76495472 -
LinuxLinux 5.10 -

II. Public POCs for CVE-2021-47471

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III. Intelligence Information for CVE-2021-47471

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Other References for CVE-2021-47471 (3)

Same Patch Batch · Linux · 2024-05-22 · 63 CVEs total

CVE-2021-47477comedi: dt9812: fix DMA buffers on stack
CVE-2021-47493ocfs2: fix race between searching chunks and release journal_head from buffer_head
CVE-2021-47495usbnet: sanity check for maxpacket
CVE-2021-47496net/tls: Fix flipped sign in tls_err_abort() calls
CVE-2021-47494cfg80211: fix management registrations locking
CVE-2021-47481RDMA/mlx5: Initialize the ODP xarray when creating an ODP MR
CVE-2021-47482net: batman-adv: fix error handling
CVE-2021-47480scsi: core: Put LLD module refcnt after SCSI device is released
CVE-2021-47478isofs: Fix out of bound access for corrupted isofs image
CVE-2021-47479staging: rtl8712: fix use-after-free in rtl8712_dl_fw
CVE-2021-47483regmap: Fix possible double-free in regcache_rbtree_exit()
CVE-2021-47476comedi: ni_usb6501: fix NULL-deref in command paths
CVE-2021-47475comedi: vmk80xx: fix transfer-buffer overflows
CVE-2021-47474comedi: vmk80xx: fix bulk-buffer overflow
CVE-2021-47473scsi: qla2xxx: Fix a memory leak in an error path of qla2x00_process_els()
CVE-2021-47470mm, slub: fix potential use-after-free in slab_debugfs_fops
CVE-2021-47468isdn: mISDN: Fix sleeping function called from invalid context
CVE-2021-47467kunit: fix reference count leak in kfree_at_end
CVE-2021-47466mm, slub: fix potential memoryleak in kmem_cache_open()
CVE-2021-47465KVM: PPC: Book3S HV: Fix stack handling in idle_kvm_start_guest()

Showing top 20 of 63 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2021-47471

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