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CVE-2021-47477— comedi: dt9812: fix DMA buffers on stack

EPSS 0.06% · P19

Affected Version Matrix 20

VendorProductVersion RangeStatus
LinuxLinux63274cd7d38a3322d90b66a5bc976de1fb899051< a6af69768d5cb4b2528946d53be5fa19ade37723affected
63274cd7d38a3322d90b66a5bc976de1fb899051< 365a346cda82f51d835c49136a00a9df8a78c7f2affected
63274cd7d38a3322d90b66a5bc976de1fb899051< 8a52bc480992c7c9da3ebfea456af731f50a4b97affected
63274cd7d38a3322d90b66a5bc976de1fb899051< 39ea61037ae78f14fa121228dd962ea3280eacf3affected
63274cd7d38a3322d90b66a5bc976de1fb899051< 3efb7af8ac437085b6c776e5b54830b149d86efeaffected
63274cd7d38a3322d90b66a5bc976de1fb899051< 786f5b03450454557ff858a8bead5d7c0cbf78d6affected
63274cd7d38a3322d90b66a5bc976de1fb899051< 3ac273d154d634e2034508a14db82a95d7ad12edaffected
63274cd7d38a3322d90b66a5bc976de1fb899051< 20cebb8b620dc987e55ddc46801de986e081757eaffected
… +12 more rows
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I. Basic Information for CVE-2021-47477

Vulnerability Information
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Vulnerability Title
comedi: dt9812: fix DMA buffers on stack
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: comedi: dt9812: fix DMA buffers on stack USB transfer buffers are typically mapped for DMA and must not be allocated on the stack or transfers will fail. Allocate proper transfer buffers in the various command helpers and return an error on short transfers instead of acting on random stack data. Note that this also fixes a stack info leak on systems where DMA is not used as 32 bytes are always sent to the device regardless of how short the command is.
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，该漏洞源于不支持 DMA 的系统上存在堆栈信息泄漏问题。
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 63274cd7d38a3322d90b66a5bc976de1fb899051 ~ a6af69768d5cb4b2528946d53be5fa19ade37723 -
LinuxLinux 2.6.29 -

II. Public POCs for CVE-2021-47477

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III. Intelligence Information for CVE-2021-47477

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Other References for CVE-2021-47477 (8)

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

CVE-2021-47476comedi: ni_usb6501: fix NULL-deref in command paths
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-2021-47475comedi: 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 &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2021-47477

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