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CVE-2021-3753

Date: February 15, 2022

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.

Severity Score

Related Resources (9)

https://security-tracker.debian.org/tracker/CVE-2021-3753
https://people.canonical.com/~ubuntu-security/cve/CVE-2021-3753
https://github.com/torvalds/linux/commit/2287a51ba822384834dafc1c798453375d1107c7
https://bugzilla.redhat.com/show_bug.cgi?id=1999589
https://security.netapp.com/advisory/ntap-20221028-0003/
https://www.openwall.com/lists/oss-security/2021/09/01/4
https://nvd.nist.gov/vuln/detail/CVE-2021-3753
https://access.redhat.com/security/cve/CVE-2021-3753
https://www.mend.io/vulnerability-database/CVE-2021-3753

Severity Score

Weakness Type (CWE)

Out-of-bounds Read

CWE-125

Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

CWE-362

CVSS v3.1

Base Score:
Attack Vector (AV): LOCAL
Attack Complexity (AC): HIGH
Privileges Required (PR): LOW
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): HIGH
Integrity (I): NONE
Availability (A): NONE

CVSS v2

Base Score:
Access Vector (AV): LOCAL
Access Complexity (AC): MEDIUM
Authentication (AU): NONE
Confidentiality (C): PARTIAL
Integrity (I): NONE
Availability (A): NONE
Additional information:

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