Out-of-bounds Read in Linux Kernel
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 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.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.7 (Medium). Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.004 (27.9th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 28th percentile — 27.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000
Affected products
Weakness classification (CWE)
Public proof-of-concept exploits
References
- bugzilla.redhat.com/show_bug.cgi (Patch, Third Party Advisory, Issue Tracking)
- github.com/torvalds/linux/commit/2287a51ba822384834dafc1c798453375d1107c7 (Patch, Third Party Advisory)
- www.openwall.com/lists/oss-security/2021/09/01/4 (Exploit, Patch, Mailing List, Third Party Advisory)
- security.netapp.com/advisory/ntap-20221028-0003/ (Third Party Advisory)
Frequently asked questions
- What is CVE-2021-3753?
- CVE-2021-3753 is a medium-severity vulnerability in Linux Kernel, classified under Out-of-bounds Read. CVSS score: 4.7/10. Published 2022-02-16.
- How severe is CVE-2021-3753?
- Medium severity. CVSS v3 base score is 4.7 out of 10.
- Is CVE-2021-3753 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.