CVE-2021-46968
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)
s390/zcrypt: fix zcard and zqueue hot-unplug memleak
In the Linux kernel, the following vulnerability has been resolved: s390/zcrypt: fix zcard and zqueue hot-unplug memleak Tests with kvm and a kmemdebug kernel showed, that on hot unplug the zcard and zqueue structs for the unplugged card or queue are not properly freed because of a mismatch with get/put for the embedded kref counter. This fix now adjusts the handling of the kref counters. With init the kref counter starts with 1. This initial value needs to drop to zero with the unregister of the card or queue to trigger the release and free the object.
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) |
|---|---|---|---|---|---|
| 29c2680fd2bf3862ff5cf2957f198512493156f9 | affected | git | 026499a9c2e002e621ad568d1378324ae97e5524 | Unavailable | None listed |
| 29c2680fd2bf3862ff5cf2957f198512493156f9 | affected | git | 055a063a18bcd19b93709e3eac8078d6b2f04599 | Unavailable | None listed |
| 29c2680fd2bf3862ff5cf2957f198512493156f9 | affected | git | 971dc8706cee47393d393905d294ea47e39503d3 | Unavailable | None listed |
| 29c2680fd2bf3862ff5cf2957f198512493156f9 | affected | git | 70fac8088cfad9f3b379c9082832b4d7532c16c2 | 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) |
|---|---|---|---|---|---|
| 5.10 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 0 | unaffected | semver | 5.10 | Unavailable | None listed |
| 5.10.36 | unaffected | semver | Unavailable | 5.10.* | None listed |
| 5.11.20 | unaffected | semver | Unavailable | 5.11.* | None listed |
| 5.12.3 | unaffected | semver | Unavailable | 5.12.* | None listed |
| 5.13 | unaffected | original_commit_for_fix | Unavailable | * | None listed |