VulnerabilityModified

CVE-2026-34961

MEDIUM 6.9EPSS 0.21%

Does this matter?

Lower severity and a low EPSS score (0.21%). Track it; it rarely justifies an emergency change on its own.

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.

CVSS 4.0: 6.9 MEDIUMCVSS: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/M
EPSS: 0.21% probability · 11th percentile
CISA KEV: Not listed
Weakness: CWE-125
Affected: pengutronix/barebox
Source: disclosure@vulncheck.com

References

https://github.com/barebox/bareboxProduct
https://github.com/barebox/barebox/releases/tag/v2026.04.0Release Notes
https://www.vulncheck.com/advisories/barebox-ext4-extent-parsing-out-of-bounds-readThird Party Advisory
https://y637f9qq2x.com/posts/barebox-sandbox-vulns/

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.