CVE-2021-47339
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)
media: v4l2-core: explicitly clear ioctl input data
In the Linux kernel, the following vulnerability has been resolved: media: v4l2-core: explicitly clear ioctl input data As seen from a recent syzbot bug report, mistakes in the compat ioctl implementation can lead to uninitialized kernel stack data getting used as input for driver ioctl handlers. The reported bug is now fixed, but it's possible that other related bugs are still present or get added in the future. As the drivers need to check user input already, the possible impact is fairly low, but it might still cause an information leak. To be on the safe side, always clear the entire ioctl buffer before calling the conversion handler functions that are meant to initialize them.
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) |
|---|---|---|---|---|---|
| 8dbcc3fa387c16abfc88a628cf528c439c91b332 | affected | git | dc02c0b2bd6096f2f3ce63e1fc317aeda05f74d8 | Unavailable | None listed |
| 8dbcc3fa387c16abfc88a628cf528c439c91b332 | affected | git | bfb48b54db25c3b4ef4bef5e0691464ebc4aa335 | Unavailable | None listed |
| 8dbcc3fa387c16abfc88a628cf528c439c91b332 | affected | git | 7b53cca764f9b291b7907fcd39d9e66ad728ee0b | 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) |
|---|---|---|---|---|---|
| 5.11 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 0 | unaffected | semver | 5.11 | Unavailable | None listed |
| 5.12.18 | unaffected | semver | Unavailable | 5.12.* | None listed |
| 5.13.3 | unaffected | semver | Unavailable | 5.13.* | None listed |
| 5.14 | unaffected | original_commit_for_fix | Unavailable | * | None listed |