CVE-2021-47477
CVE.org · Published
- Record status
- Published
- Identifier year (not publication year)
- 2021
- Source publication
- Source updated
- Imported by cveboard
- Source snapshot
- cve_2026-10-24_midnight_baseline ·
CNA source text (English)
comedi: dt9812: fix DMA buffers on stack
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.
Scoped product and version facts
Fix information unknown; no fixed version is derived here. Missing information does not prove that no fix exists.
Exploitation unknown; this catalogue does not assess exploitation.
Linux
- Vendor
- Linux
- Product
- Linux
- Platforms
- Unknown
- Default status
unaffected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 63274cd7d38a3322d90b66a5bc976de1fb899051 | affected | git | a6af69768d5cb4b2528946d53be5fa19ade37723 | Unavailable | None listed |
| 63274cd7d38a3322d90b66a5bc976de1fb899051 | affected | git | 365a346cda82f51d835c49136a00a9df8a78c7f2 | Unavailable | None listed |
| 63274cd7d38a3322d90b66a5bc976de1fb899051 | affected | git | 8a52bc480992c7c9da3ebfea456af731f50a4b97 | Unavailable | None listed |
| 63274cd7d38a3322d90b66a5bc976de1fb899051 | affected | git | 39ea61037ae78f14fa121228dd962ea3280eacf3 | Unavailable | None listed |
| 63274cd7d38a3322d90b66a5bc976de1fb899051 | affected | git | 3efb7af8ac437085b6c776e5b54830b149d86efe | Unavailable | None listed |
| 63274cd7d38a3322d90b66a5bc976de1fb899051 | affected | git | 786f5b03450454557ff858a8bead5d7c0cbf78d6 | Unavailable | None listed |
| 63274cd7d38a3322d90b66a5bc976de1fb899051 | affected | git | 3ac273d154d634e2034508a14db82a95d7ad12ed | Unavailable | None listed |
| 63274cd7d38a3322d90b66a5bc976de1fb899051 | affected | git | 20cebb8b620dc987e55ddc46801de986e081757e | Unavailable | None listed |
| 63274cd7d38a3322d90b66a5bc976de1fb899051 | affected | git | 536de747bc48262225889a533db6650731ab25d3 | Unavailable | None listed |
Linux
- Vendor
- Linux
- Product
- Linux
- Platforms
- Unknown
- Default status
affected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 2.6.29 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 0 | unaffected | semver | 2.6.29 | Unavailable | None listed |
| 4.4.292 | unaffected | semver | Unavailable | 4.4.* | None listed |
| 4.9.290 | unaffected | semver | Unavailable | 4.9.* | None listed |
| 4.14.255 | unaffected | semver | Unavailable | 4.14.* | None listed |
| 4.19.217 | unaffected | semver | Unavailable | 4.19.* | None listed |
| 5.4.159 | unaffected | semver | Unavailable | 5.4.* | None listed |
| 5.10.79 | unaffected | semver | Unavailable | 5.10.* | None listed |
| 5.14.18 | unaffected | semver | Unavailable | 5.14.* | None listed |
| 5.15.2 | unaffected | semver | Unavailable | 5.15.* | None listed |
| 5.16 | unaffected | original_commit_for_fix | Unavailable | * | None listed |