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CVE-2022-39343

26
FAUCET Score

CVE-2022-39343 is a high-severity vulnerability affecting Azure RTOS FileX versions prior to 6.2.0, stemming from integer under/overflows within its Fault Tolerant feature. Specifically, crafted log entries of type FX_FAULT_TOLERANT_DIR_LOG_TYPE can be used to trigger buffer overflows and modify memory contents during the recovery process. This local attack, requiring user interaction, could lead to high impact on confidentiality, integrity, and availability. While no active exploitation, public exploits, or significant community discussion have been observed, a patch is available in version 6.2.0, and a workaround is documented.

Impacted Technologies

VendorProductVersion(s)CPE
< 6.2.0CPE matchmatch criteria
cpe:2.3:o:microsoft:azure_rtos_filex:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

5.6MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
LOW
Exploitability Score
2.2
Impact Score
3.4
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.82%
Probability of exploitation in next 30 days
EPSS Percentile
53.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0082 is in the 50th 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

Patch Available

Vendor Patches (1)

github_advisorypatch availablevia nvd_reference
View patch

References

github.com / azure-rtos/filex/blob/master/common/src/fx_fault_tolerant_apply_logs.c
PatchThird Party Advisory
github.com / azure-rtos/filex/security/advisories/GHSA-8jqf-wjhq-4w9f
ExploitMitigationThird Party Advisory