CVE-2025-21836
CVE.org · Published
- Record status
- Published
- Identifier year (not publication year)
- 2025
- Source publication
- Source updated
- Imported by cveboard
- Source snapshot
- cve_2026-10-24_midnight_baseline ·
CNA source text (English)
io_uring/kbuf: reallocate buf lists on upgrade
In the Linux kernel, the following vulnerability has been resolved: io_uring/kbuf: reallocate buf lists on upgrade IORING_REGISTER_PBUF_RING can reuse an old struct io_buffer_list if it was created for legacy selected buffer and has been emptied. It violates the requirement that most of the field should stay stable after publish. Always reallocate it instead.
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) |
|---|---|---|---|---|---|
| 2fcabce2d7d34f69a888146dab15b36a917f09d4 | affected | git | 146a185f6c05ee263db715f860620606303c4633 | Unavailable | None listed |
| 2fcabce2d7d34f69a888146dab15b36a917f09d4 | affected | git | 7d0dc28dae836caf7645fef62a10befc624dd17b | Unavailable | None listed |
| 2fcabce2d7d34f69a888146dab15b36a917f09d4 | affected | git | 2a5febbef40ce968e295a7aeaa5d5cbd9e3e5ad4 | Unavailable | None listed |
| 2fcabce2d7d34f69a888146dab15b36a917f09d4 | affected | git | 8802766324e1f5d414a81ac43365c20142e85603 | 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) |
|---|---|---|---|---|---|
| 5.19 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 0 | unaffected | semver | 5.19 | Unavailable | None listed |
| 6.6.79 | unaffected | semver | Unavailable | 6.6.* | None listed |
| 6.12.16 | unaffected | semver | Unavailable | 6.12.* | None listed |
| 6.13.4 | unaffected | semver | Unavailable | 6.13.* | None listed |
| 6.14 | unaffected | original_commit_for_fix | Unavailable | * | None listed |