{"id":"CVE-2026-34961","title":"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","summary":"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 ex…","severity":"medium","cvss":6.2,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","cwe":["CWE-125"],"vendor":"pengutronix","product":"barebox","affected":["barebox < 2026.04.0"],"patched":["barebox 2026.04.0"],"published":"2026-05-11","updated":"2026-07-18","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-34961","references":[{"url":"https://github.com/barebox/barebox","label":"disclosure@vulncheck.com"},{"url":"https://github.com/barebox/barebox/releases/tag/v2026.04.0","label":"disclosure@vulncheck.com"},{"url":"https://www.vulncheck.com/advisories/barebox-ext4-extent-parsing-out-of-bounds-read","label":"disclosure@vulncheck.com"},{"url":"https://y637f9qq2x.com/posts/barebox-sandbox-vulns/","label":"disclosure@vulncheck.com"}],"tags":["nvd"],"epss":0.00219,"epssPercentile":0.11028,"ingestedAt":"2026-07-18T03:20:40.166Z","slug":"CVE-2026-34961","body":"## Overview\n\nbarebox 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.\n\n## Affected\n\n- `barebox < 2026.04.0`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `barebox 2026.04.0`","depth":"sunlit","depthScore":34,"depthScoreParts":{"impact":34.1,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}