Dashboard / CVE-2026-34961

CVE-2026-34961

MEDIUM
MEDIUM Priority: 0.01 BB Relevance: 49/100
Published: 2026-05-11 Modified: 2026-11-11 First seen: 2026-11-08 Status: active

Attack Surface

Low Complexity No Auth No Interaction

CVSS Vector Breakdown

AV: Local
AC: Low
PR: None
UI: None
S: X
AT: None
VC: None
VI: None
VA: High

Description

barebox prior to version 2026.04.0 contains out-of-bounds read vulnerabilities in ext4 extent parsing due to missing validation of the eh_entries field against buffer capacity in fs/ext4/ext4_common.c. Attackers can supply a malicious ext4 filesystem image via USB, SD card, or network boot to trigger heap out-of-bounds reads during boot-time filesystem parsing, potentially redirecting reads to arbitrary disk offsets.

Weakness Classification (1)

Affected Software (2)

VendorProductVersion
barebox barebox 0 < 2026.04.0
pengutronix barebox < 2026.04.0

References & Advisories (4)

Bug Bounty Relevance

49 / 100
✓ No authentication
✓ Low complexity
✓ No user interaction

CVSS Score

6.9 / 10.0 v4.0
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS — Exploitation Probability

0.21%
Raw Score 0.002070
Percentile 10.9%
Date 2026-11-13

EPSS Trend

2026-11-13
0.00207
2026-11-12
0.00207
2026-11-10
0.00207
2026-11-09
0.00207
2026-11-08
0.00207

Intelligence Sources

mitre ref →
nvd ref →

External Links