CVE-2021-3753
medium
CVSS v3
—
VIR risk
5.5
Description
A race problem was seen in the vt_k_ioctl in drivers/tty/vt/vt_ioctl.c in the Linux kernel, which may cause an out of bounds read in vt as the write access to vc_mode is not protected by lock-in vt_ioctl (KDSETMDE). The highest threat from this vulnerability is to data confidentiality.
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 |
|---|---|---|---|
| arch | fixed | 5.14.2.zen1-2 | |
| rocky | 8 | fixed | |
| sles | affected | | |
| debian | bookworm | fixed | 5.14.6-1 |
| debian | bullseye | fixed | 5.10.46-5 |
| 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-modules-extra-4.18.0-553.rt7.342.el8_10.x86_64.rpm |
References
- https://errata.rockylinux.org/RLSA-2024:2950
- https://www.suse.com/security/cve/CVE-2021-3753.html
- https://security-tracker.debian.org/tracker/CVE-2021-3753
- https://access.redhat.com/errata/RHSA-2024:3138
- https://bugzilla.redhat.com/1731000
- https://bugzilla.redhat.com/1746732
- https://bugzilla.redhat.com/1888726
- https://bugzilla.redhat.com/1999589
- https://bugzilla.redhat.com/2039178
- https://bugzilla.redhat.com/2043520
- https://bugzilla.redhat.com/2044578
- https://bugzilla.redhat.com/2150953
- https://bugzilla.redhat.com/2151959
- https://bugzilla.redhat.com/2177759
- https://bugzilla.redhat.com/2179892
- https://bugzilla.redhat.com/2213132
- https://bugzilla.redhat.com/2218332
- https://bugzilla.redhat.com/2219359
- https://bugzilla.redhat.com/2221039
- https://bugzilla.redhat.com/2221463
- https://bugzilla.redhat.com/2221702
- https://bugzilla.redhat.com/2226777
- https://bugzilla.redhat.com/2226784
- https://bugzilla.redhat.com/2226787
- https://bugzilla.redhat.com/2226788
💬 Discuss CVE-2021-3753 on VIR Community →
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.