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Vulnerability Intelligence

CVE-2021-33656

MEDIUM6.8

When setting font with malicous data by ioctl cmd PIO_FONT,kernel will write memory out of bounds

Published Jul 18, 2022

Modified 1 years ago

No fix available

Details

When setting font with malicous data by ioctl cmd PIO_FONT,kernel will write memory out of bounds.

References

WEBhttp://www.openwall.com/lists/oss-security/2022/07/19/3 WEBhttps://git.kernel.org/pub/scm/linux/kernel/git/stable/stable-queue.git/tree/releases/5.10.127/vt-drop-old-font-ioctls.patch WEBhttps://lists.debian.org/debian-lts-announce/2022/10/msg00000.html ADVISORYhttps://www.cve.org/CVERecord?id=CVE-2021-33656 WEBhttps://www.openeuler.org/en/security/cve/detail.html?id=CVE-2021-33656&packageName=kernel

CVSS Analysis

CVSS v3.1

6.8

Exploitability

Attack Vector

PhysicalAV:P

Attack Complexity

LowAC:L

Privileges Required

NonePR:N

User Interaction

NoneUI:N

Scope

Scope

UnchangedS:U

Impact

Confidentiality

HighC:H

Integrity

HighI:H

Availability

HighA:H

6.8/CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weakness Type (CWE)

Memory Safety

Out-of-bounds Write

Ecosystems

Timeline

PublishedJul 18, 2022

ModifiedAug 3, 2024

CVE-2021-33656 | Mondoo Vulnerability Intelligence