CVE-2021-20226
medium
CVSS v3
—
CVSS v2
—
VIR risk
5.5
Description
A use-after-free flaw was found in the io_uring in Linux kernel, where a local attacker with a user privilege could cause a denial of service problem on the system The issue results from the lack of validating the existence of an object prior to performing operations on the object by not incrementing the file reference counter while in use. The highest threat from this vulnerability is to data integrity, confidentiality and system availability.
Predictions
Exploit likelihood
20%
Patch ETA
—
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
Vendor advisory: debian — https://security-tracker.debian.org/tracker/CVE-2021-20226
Vendor advisory: suse — https://www.suse.com/security/cve/CVE-2021-20226.html
OS impact
| OS | Version | Status | Fixed in |
|---|---|---|---|
| arch | fixed | 5.10.1.zen1-1 | |
| sles | affected | | |
| debian | bookworm | fixed | 5.10.4-1 |
| debian | bullseye | fixed | 5.10.4-1 |
| debian | forky | fixed | 5.10.4-1 |
| debian | sid | fixed | 5.10.4-1 |
| debian | trixie | fixed | 5.10.4-1 |
References
Verify integrity in audit chain (admin only). AS-IS.