CVE-2021-47475— comedi: vmk80xx: fix transfer-buffer overflows
Affected Version Matrix 20
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Linux | Linux | 985cafccbf9b7f862aa1c5ee566801e18b5161fb< 5229159f1d052821007aff1a1beb7873eacf1a9f | affected |
985cafccbf9b7f862aa1c5ee566801e18b5161fb< ec85bcff4ed09260243d8f39faba99e1041718ba | affected | ||
985cafccbf9b7f862aa1c5ee566801e18b5161fb< 40d2a7e278e2e7c0a5fd7e997e7eb63945bf93f7 | affected | ||
985cafccbf9b7f862aa1c5ee566801e18b5161fb< 7a2021b896de1ad559d33b5c5cdd20b982242088 | affected | ||
985cafccbf9b7f862aa1c5ee566801e18b5161fb< 199acd8c110e3ae62833c24f632b0bb1c9f012a9 | affected | ||
985cafccbf9b7f862aa1c5ee566801e18b5161fb< 33d7a470730dfe7c9bfc8da84575cf2cedd60d00 | affected | ||
985cafccbf9b7f862aa1c5ee566801e18b5161fb< 278484ae93297b1bb1ce755f9d3b6d95a48c7d47 | affected | ||
985cafccbf9b7f862aa1c5ee566801e18b5161fb< 06ac746d57e6d32b062e220415c607b7e2e0fa50 | affected | ||
| … +12 more rows | |||
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I. Basic Information for CVE-2021-47475
Vulnerability Information
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Vulnerability Title
comedi: vmk80xx: fix transfer-buffer overflows
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: comedi: vmk80xx: fix transfer-buffer overflows The driver uses endpoint-sized USB transfer buffers but up until recently had no sanity checks on the sizes. Commit e1f13c879a7c ("staging: comedi: check validity of wMaxPacketSize of usb endpoints found") inadvertently fixed NULL-pointer dereferences when accessing the transfer buffers in case a malicious device has a zero wMaxPacketSize. Make sure to allocate buffers large enough to handle also the other accesses that are done without a size check (e.g. byte 18 in vmk80xx_cnt_insn_read() for the VMK8061_MODEL) to avoid writing beyond the buffers, for example, when doing descriptor fuzzing. The original driver was for a low-speed device with 8-byte buffers. Support was later added for a device that uses bulk transfers and is presumably a full-speed device with a maximum 64-byte wMaxPacketSize.
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，该漏洞源于存在缓冲区溢出漏洞。
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-2021-47475
| # | POC Description | Source Link | Shenlong Link |
|---|
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Other References for CVE-2021-47475 (9)
Same Patch Batch · Linux · 2024-05-22 · 63 CVEs total
| CVE-2021-47477 | comedi: dt9812: fix DMA buffers on stack | |
| CVE-2021-47493 | ocfs2: fix race between searching chunks and release journal_head from buffer_head | |
| CVE-2021-47495 | usbnet: sanity check for maxpacket | |
| CVE-2021-47496 | net/tls: Fix flipped sign in tls_err_abort() calls | |
| CVE-2021-47494 | cfg80211: fix management registrations locking | |
| CVE-2021-47481 | RDMA/mlx5: Initialize the ODP xarray when creating an ODP MR | |
| CVE-2021-47482 | net: batman-adv: fix error handling | |
| CVE-2021-47480 | scsi: core: Put LLD module refcnt after SCSI device is released | |
| CVE-2021-47478 | isofs: Fix out of bound access for corrupted isofs image | |
| CVE-2021-47479 | staging: rtl8712: fix use-after-free in rtl8712_dl_fw | |
| CVE-2021-47483 | regmap: Fix possible double-free in regcache_rbtree_exit() | |
| CVE-2021-47476 | comedi: ni_usb6501: fix NULL-deref in command paths | |
| CVE-2021-47474 | comedi: vmk80xx: fix bulk-buffer overflow | |
| CVE-2021-47473 | scsi: qla2xxx: Fix a memory leak in an error path of qla2x00_process_els() | |
| CVE-2021-47471 | drm: mxsfb: Fix NULL pointer dereference crash on unload | |
| CVE-2021-47470 | mm, slub: fix potential use-after-free in slab_debugfs_fops | |
| CVE-2021-47468 | isdn: mISDN: Fix sleeping function called from invalid context | |
| CVE-2021-47467 | kunit: fix reference count leak in kfree_at_end | |
| CVE-2021-47466 | mm, slub: fix potential memoryleak in kmem_cache_open() | |
| CVE-2021-47465 | KVM: 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
- CVE-2026-45846
bareudp: fix NULL pointer dereference in bareudp_fill_metada - CVE-2026-45845
net/sched: taprio: fix NULL pointer dereference in class dum - CVE-2026-45844
netfilter: arp_tables: fix IEEE1394 ARP payload parsing - CVE-2026-45843
slip: bound decode() reads against the compressed packet len - CVE-2026-45842
slip: reject VJ receive packets on instances with no rstate
Same vendor: Linux
- CVE-2026-45846
bareudp: fix NULL pointer dereference in bareudp_fill_metada - CVE-2026-45845
net/sched: taprio: fix NULL pointer dereference in class dum - CVE-2026-45844
netfilter: arp_tables: fix IEEE1394 ARP payload parsing - CVE-2026-45843
slip: bound decode() reads against the compressed packet len - CVE-2026-45842
slip: reject VJ receive packets on instances with no rstate
V. Comments for CVE-2021-47475
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