Vulnerability Details : CVE-2021-33656
When setting font with malicous data by ioctl cmd PIO_FONT,kernel will write memory out of bounds.
Vulnerability category: Memory Corruption
Products affected by CVE-2021-33656
- cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
- cpe:2.3:o:huawei:openeuler:20.03:sp1:*:*:lts:*:*:*
- cpe:2.3:o:huawei:openeuler:20.03:sp3:*:*:lts:*:*:*
- cpe:2.3:o:huawei:openeuler:20.03:-:*:*:lts:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2021-33656
0.08%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 31 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2021-33656
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
6.8
|
MEDIUM | CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
0.9
|
5.9
|
NIST |
CWE ids for CVE-2021-33656
-
The product writes data past the end, or before the beginning, of the intended buffer.Assigned by:
- nvd@nist.gov (Primary)
- securities@openeuler.org (Secondary)
References for CVE-2021-33656
-
http://www.openwall.com/lists/oss-security/2022/07/19/3
oss-security - CVE-2021-33656: Linux kernel: When setting font with malicous data by ioctl cmd PIO_FONT,kernel will write memory out of bounds.(<5.10.127)Mailing List;Patch;Third Party Advisory
-
https://git.kernel.org/pub/scm/linux/kernel/git/stable/stable-queue.git/tree/releases/5.10.127/vt-drop-old-font-ioctls.patch
vt-drop-old-font-ioctls.patch « 5.10.127 « releases - kernel/git/stable/stable-queue.git - Linux kernel stable patch queuePatch;Third Party Advisory
-
https://lists.debian.org/debian-lts-announce/2022/10/msg00000.html
[SECURITY] [DLA 3131-1] linux security updateMailing List;Third Party Advisory
-
https://www.openeuler.org/en/security/cve/detail.html?id=CVE-2021-33656&packageName=kernel
Security-cveDetailThird Party Advisory
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