Buffer overflow in Linux Kernel
CVE-2021-33656
When setting font with malicous data by ioctl cmd PIO_FONT,kernel will write memory out of bounds.
Vulnerability class: Buffer Overflow
EPSS: 0.006 (44.0th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 6.8 (Medium). Vector: CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Linux Linux_kernel
- Openatom Openeuler — versions 20.03
- Debian Debian_linux — versions 10.0
- N/a Openeuler:kernel — versions <5.10.127
Weakness classification (CWE)
Public proof-of-concept exploits
References
- securities@openeuler.org (Patch, Third Party Advisory, x_refsource_MISC)
- securities@openeuler.org (Third Party Advisory, x_refsource_MISC)
- securities@openeuler.org (mailing-list, x_refsource_MLIST, Patch, Mailing List, Third Party Advisory)
- securities@openeuler.org (mailing-list, x_refsource_MLIST, Mailing List, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-33656?
- CVE-2021-33656 is a medium-severity vulnerability in Linux Kernel, classified under Out-of-bounds Write. CVSS score: 6.8/10. Published 2022-07-18.
- How severe is CVE-2021-33656?
- Medium severity. CVSS v3 base score is 6.8 out of 10.
- Is CVE-2021-33656 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.