CVE-2021-33656
high
CVSS v3
—
VIR risk
8.0
Description
When setting font with malicous data by ioctl cmd PIO_FONT,kernel will write memory out of bounds.
Predictions
Exploit likelihood
20%
Patch ETA
—
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No vendor mitigations ingested yet for this CVE. The mitigation-content worker queues fetches as references arrive — check back in a few minutes, or see the references list below.
OS impact
| OS | Version | Status | Fixed in |
|---|---|---|---|
| sles | affected | | |
| debian | bookworm | fixed | 5.14.6-1 |
| debian | bullseye | fixed | 5.10.127-1 |
| debian | forky | fixed | 5.14.6-1 |
| debian | sid | fixed | 5.14.6-1 |
| debian | trixie | fixed | 5.14.6-1 |
| almalinux | 8 | fixed | kernel-rt-debug-core-4.18.0-477.10.1.rt7.274.el8_8.x86_64.rpm |
References
- https://www.suse.com/security/cve/CVE-2021-33656.html
- https://security-tracker.debian.org/tracker/CVE-2021-33656
- https://access.redhat.com/errata/RHSA-2023:2951
- https://bugzilla.redhat.com/2055499
- https://bugzilla.redhat.com/2061703
- https://bugzilla.redhat.com/2078466
- https://bugzilla.redhat.com/2084125
- https://bugzilla.redhat.com/2085300
- https://bugzilla.redhat.com/2090723
- https://bugzilla.redhat.com/2108691
- https://bugzilla.redhat.com/2108696
- https://bugzilla.redhat.com/2114937
- https://bugzilla.redhat.com/2122228
- https://bugzilla.redhat.com/2122960
- https://bugzilla.redhat.com/2123056
- https://bugzilla.redhat.com/2124788
- https://bugzilla.redhat.com/2127985
- https://bugzilla.redhat.com/2130141
- https://bugzilla.redhat.com/2133483
- https://bugzilla.redhat.com/2134377
- https://bugzilla.redhat.com/2134451
- https://bugzilla.redhat.com/2134506
- https://bugzilla.redhat.com/2134517
- https://bugzilla.redhat.com/2134528
- https://bugzilla.redhat.com/2137979
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Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.