What is CVE-2020-12654?

CVE-2020-12654 is a high-severity vulnerability in Linux Kernel, classified under Out-of-bounds Write. CVSS score: 7.1/10. Published 2020-05-05.

How severe is CVE-2020-12654?

High severity. CVSS v3 base score is 7.1 out of 10.

Is CVE-2020-12654 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Buffer overflow in Linux Kernel

CVE-2020-12654

An issue was found in Linux kernel before 5.5.4. mwifiex_ret_wmm_get_status() in drivers/net/wireless/marvell/mwifiex/wmm.c allows a remote AP to trigger a heap-based buffer overflow because of an incorrect memcpy, aka CID-3a9b153c5591.

Vulnerability class: Buffer Overflow

Published 2020-05-05 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.1 (High). Vector: CVSS:3.1/AV:A/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.012 (67.6th percentile), scored 2026-10-03.

Low probability of exploitation in the next 30 days, but still tracked. 68th percentile — 67.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.012 · newest: 0.012 · change: 0.000

Affected products

Linux Kernel

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

Public proof-of-concept exploits

ARPSyndicate/cvemon

References

cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.5.4 (Release Notes, Vendor Advisory)
github.com/torvalds/linux/commit/3a9b153c5591548612c3955c9600a98150c81875 (Patch, Third Party Advisory)
git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/ (Patch, Vendor Advisory)
www.openwall.com/lists/oss-security/2020/05/08/2 (mailing-list, Mailing List, Third Party Advisory)
security.netapp.com/advisory/ntap-20200608-0001/ (Third Party Advisory)
lists.debian.org/debian-lts-announce/2020/06/msg00011.html (mailing-list)
lists.debian.org/debian-lts-announce/2020/06/msg00012.html (mailing-list)
lists.debian.org/debian-lts-announce/2020/06/msg00013.html (mailing-list)
www.debian.org/security/2020/dsa-4698 (vendor-advisory)
lists.opensuse.org/opensuse-security-announce/2020-06/msg00022.html (vendor-advisory)

Frequently asked questions

What is CVE-2020-12654?: CVE-2020-12654 is a high-severity vulnerability in Linux Kernel, classified under Out-of-bounds Write. CVSS score: 7.1/10. Published 2020-05-05.
How severe is CVE-2020-12654?: High severity. CVSS v3 base score is 7.1 out of 10.
Is CVE-2020-12654 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.