CVE-2021-47040
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)
io_uring: fix overflows checks in provide buffers
In the Linux kernel, the following vulnerability has been resolved: io_uring: fix overflows checks in provide buffers Colin reported before possible overflow and sign extension problems in io_provide_buffers_prep(). As Linus pointed out previous attempt did nothing useful, see d81269fecb8ce ("io_uring: fix provide_buffers sign extension"). Do that with help of check_<op>_overflow helpers. And fix struct io_provide_buf::len type, as it doesn't make much sense to keep it signed.
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) |
|---|---|---|---|---|---|
| efe68c1ca8f49e8c06afd74b699411bfbb8ba1ff | affected | git | cbbc13b115b8f18e0a714d89f87fbdc499acfe2d | Unavailable | None listed |
| efe68c1ca8f49e8c06afd74b699411bfbb8ba1ff | affected | git | 51bf90901952aaac564bbdb36b2b503050c53dd9 | Unavailable | None listed |
| efe68c1ca8f49e8c06afd74b699411bfbb8ba1ff | affected | git | 84b8c266c4bfe9ed5128e13253c388deb74b1b03 | Unavailable | None listed |
| efe68c1ca8f49e8c06afd74b699411bfbb8ba1ff | affected | git | 38134ada0ceea3e848fe993263c0ff6207fd46e7 | 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) |
|---|---|---|---|---|---|
| 5.8 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 0 | unaffected | semver | 5.8 | Unavailable | None listed |
| 5.10.37 | unaffected | semver | Unavailable | 5.10.* | None listed |
| 5.11.21 | unaffected | semver | Unavailable | 5.11.* | None listed |
| 5.12.4 | unaffected | semver | Unavailable | 5.12.* | None listed |
| 5.13 | unaffected | original_commit_for_fix | Unavailable | * | None listed |