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CVE-2021-47474
comedi: vmk80xx: fix bulk-buffer overflow
High7.8EPSS 0.26%
- Published
- Updated
- Reserved
- Assigned by
- Linux
Description
In the Linux kernel, the following vulnerability has been resolved: comedi: vmk80xx: fix bulk-buffer overflow The driver is using endpoint-sized buffers but must not assume that the tx and rx buffers are of equal size or a malicious device could overflow the slab-allocated receive buffer when doing bulk transfers.
Timeline
ID reserved
By Linux
Published
- 24 months later
· 24 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Analyzed | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.26% · top 82% of all CVEs (7 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.8.
Weakness
Affected products
- affected 985cafccbf9b7f862aa1c5ee566801e18b5161fb – < e0e6a63fd97ad95fe05dfd77268a1952551e11a7
- affected 985cafccbf9b7f862aa1c5ee566801e18b5161fb – < 7cfb35db607760698d299fd1cf7402dfa8f09973
- affected 985cafccbf9b7f862aa1c5ee566801e18b5161fb – < 0866dcaa828c21bc2f94dac00e086078f11b5772
- affected 985cafccbf9b7f862aa1c5ee566801e18b5161fb – < 063f576c43d589a4c153554b681d32b3f8317c7b
- affected 985cafccbf9b7f862aa1c5ee566801e18b5161fb – < 1ae4715121a57bc6fa29fd992127b01907f2f993
- affected 985cafccbf9b7f862aa1c5ee566801e18b5161fb – < b7fd7f3387f070215e6be341e68eb5c087eeecc0
- affected 985cafccbf9b7f862aa1c5ee566801e18b5161fb – < 7b0e356189327287d0eb98ec081bd6dd97068cd3
- affected 985cafccbf9b7f862aa1c5ee566801e18b5161fb – < 47b4636ebdbeba2044b3db937c4d2b6a4fe3d0f2
- affected 985cafccbf9b7f862aa1c5ee566801e18b5161fb – < 78cdfd62bd54af615fba9e3ca1ba35de39d3871d
- affected 2.6.31
- unaffected < 2.6.31
- unaffected 4.4.292 – ≤ 4.4.*
- unaffected 4.9.290 – ≤ 4.9.*
- unaffected 4.14.255 – ≤ 4.14.*
- unaffected 4.19.217 – ≤ 4.19.*
- unaffected 5.4.159 – ≤ 5.4.*
- unaffected 5.10.79 – ≤ 5.10.*
- unaffected 5.14.18 – ≤ 5.14.*
- unaffected 5.15.2 – ≤ 5.15.*
- unaffected 5.16 – ≤ *
References (9)
- https://git.kernel.org/stable/c/e0e6a63fd97ad95fe05dfd77268a1952551e11a7 (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/7cfb35db607760698d299fd1cf7402dfa8f09973 (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/0866dcaa828c21bc2f94dac00e086078f11b5772 (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/063f576c43d589a4c153554b681d32b3f8317c7b (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/1ae4715121a57bc6fa29fd992127b01907f2f993 (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/b7fd7f3387f070215e6be341e68eb5c087eeecc0 (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/7b0e356189327287d0eb98ec081bd6dd97068cd3 (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/47b4636ebdbeba2044b3db937c4d2b6a4fe3d0f2 (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/78cdfd62bd54af615fba9e3ca1ba35de39d3871d (opens in a new tab)x_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2021-47474)Record last updated .