HOMEVULNERABILITIESCVE-2026-34962
MEDIUM

CVE-2026-34962

CWE-835Published: May 11, 2026· Updated: May 13, 2026

5.5
CVSS v3.1
EPSS:0.01%probability of exploitation in 30 daysPercentile:1.7th

Official Description

barebox version prior to 2026.04.0 contains a denial-of-service vulnerability in ext4 directory parsing in fs/ext4/ext4_common.c where the ext4fs_iterate_dir() function fails to validate that directory entry length values are non-zero. Attackers can supply a malicious ext4 filesystem image with a crafted directory entry containing a direntlen value of 0 to cause an infinite loop during directory listing or path resolution, resulting in the boot process hanging indefinitely.

NVD Source

Technical Analysis

CVE-2026-34962 requires local access, meaning attackers must already have a foothold on the target system.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A successful exploit results in availability disruption (denial of service), with a CVSS base score of 5.5.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorLocal
Attack ComplexityLow
Privileges Req.Low
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityNone
IntegrityNone
AvailabilityHigh
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected Vendors & Products

pengutronix1 product
barebox
Source: NVD CPE · 1 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

ADVISORYhttps://www.vulncheck.com/advisories/barebox-ext4-directory-parsing-infinite-loop-denial-of-service

All References (3)

→
https://github.com/barebox/bareboxProduct
→
https://github.com/barebox/barebox/releases/tag/v2026.04.0Release Notes
→
https://www.vulncheck.com/advisories/barebox-ext4-directory-parsing-infinite-loop-denial-of-serviceThird Party Advisory

Quick Facts

CVE IDCVE-2026-34962
CVSS Score5.5 / 10
SeverityMEDIUM
WeaknessCWE-835
CISA KEVNo
EPSS (30d)0.01%
Affected1 vendor
PublishedMay 11, 2026

Related CVEs (CWE-835)

CVE-2026-39806
8.7
CVE-2026-44302
7.5
CVE-2025-71319
7.5
CVE-2026-54904
7.5
CVE-2026-27114
7.5
CVE-2026-29975
7.5

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2026-34962 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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