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CVE-2022-33967

25
FAUCET Score

CVE-2022-33967 describes a heap-based buffer overflow in the squashfs filesystem implementation of U-Boot versions v2020.10-rc2 through v2022.07-rc5. This vulnerability, triggered by a specially crafted squashfs image, carries a high CVSS score of 7.8 due to its potential for denial-of-service or arbitrary code execution. While the attack requires local access and user interaction, its impact is significant. Currently, there is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
2020.10CPE matchmatch criteria
cpe:2.3:a:denx:u-boot:2020.10:rc2:*:*:*:*:*:*
2020.10CPE matchmatch criteria
cpe:2.3:a:denx:u-boot:2020.10:rc3:*:*:*:*:*:*
2020.10CPE matchmatch criteria
cpe:2.3:a:denx:u-boot:2020.10:rc4:*:*:*:*:*:*
2020.10CPE matchmatch criteria
cpe:2.3:a:denx:u-boot:2020.10:rc5:*:*:*:*:*:*
2021.01CPE matchmatch criteria
cpe:2.3:a:denx:u-boot:2021.01:-:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.8HIGH

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

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
1.8
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.55%
Probability of exploitation in next 30 days
EPSS Percentile
42.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0055 is in the 42nd percentile among its peer group of 11,621 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Advisories (1)

microsoft2022-Jul/CVE-2022-33967

squashfs filesystem implementation of U-Boot versions from v2020.10-rc2 to v2022.07-rc5 contains a heap-based buffer overflow vulnerability due to a defect in the metadata reading process. Loading a specially crafted squashfs image may lead to a denial-of-service (DoS) condition or arbitrary code execution.

Jul 12, 2022

References

lists.debian.org / debian-lts-announce/2025/05/msg00001.html
jvn.jp / en/vu/JVNVU97846460/index.html
Third Party Advisory
lists.denx.de / pipermail/u-boot/2022-June/487467.html
ExploitMailing ListVendor Advisory
source.denx.de / u-boot/u-boot/-/commit/7f7fb9937c6cb49dd35153bd6708872b390b0a44
PatchThird Party AdvisoryVendor Advisory
denx.de / project/u-boot
Product