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CVE-2021-47494— cfg80211: fix management registrations locking

EPSS 0.03% · P7
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I. Basic Information for CVE-2021-47494

Vulnerability Information
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Vulnerability Title
cfg80211: fix management registrations locking
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: cfg80211: fix management registrations locking The management registrations locking was broken, the list was locked for each wdev, but cfg80211_mgmt_registrations_update() iterated it without holding all the correct spinlocks, causing list corruption. Rather than trying to fix it with fine-grained locking, just move the lock to the wiphy/rdev (still need the list on each wdev), we already need to hold the wdev lock to change it, so there's no contention on the lock in any case. This trivially fixes the bug since we hold one wdev's lock already, and now will hold the lock that protects all lists.
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cfg80211_mgmt_registrations_update函数对其进行迭代而没有持有所有正确的自旋锁，从而导致列表损坏。
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 6cd536fe62ef58d7c4eac2da07ab0ed7fd19010d ~ 4c22227e39c7a0b4dab55617ee8d34d171fab8d4 -
LinuxLinux 5.8 -

II. Public POCs for CVE-2021-47494

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III. Intelligence Information for CVE-2021-47494

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

CVE-2021-47476comedi: ni_usb6501: fix NULL-deref in command paths
CVE-2021-47492mm, thp: bail out early in collapse_file for writeback page
CVE-2021-47495usbnet: sanity check for maxpacket
CVE-2021-47496net/tls: Fix flipped sign in tls_err_abort() calls
CVE-2021-47493ocfs2: fix race between searching chunks and release journal_head from buffer_head
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-2021-47477comedi: dt9812: fix DMA buffers on stack
CVE-2021-47481RDMA/mlx5: Initialize the ODP xarray when creating an ODP MR
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-2021-47471drm: mxsfb: Fix NULL pointer dereference crash on unload
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 → →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

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