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CVE-2021-3753
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…
Medium4.7EPSS 0.36%
- Published
- Updated
- Reserved
- Assigned by
- redhat
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.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 3.1 | Medium4.7 | CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N |
- EPSS (exploitation in 30 days)
- 0.36% · top 70% of all CVEs (6 Nov 2026)
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The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 4.7.
Weakness
Affected products
kernel
- affected Linux kernel 5.15-rc1
References (4)
- https://bugzilla.redhat.com/show_bug.cgi?id=1999589 (opens in a new tab)x_transferred
- https://github.com/torvalds/linux/commit/2287a51ba822384834dafc1c798453375d1107c7 (opens in a new tab)x_transferred
- https://www.openwall.com/lists/oss-security/2021/09/01/4 (opens in a new tab)x_transferred
- https://security.netapp.com/advisory/ntap-20221028-0003/ (opens in a new tab)x_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2021-3753)Record last updated .