{"id":"CVE-2026-71973","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-71973","generatedAt":"2026-10-28T04:14:23.931Z","title":"U-Boot before 2026.10-rc4 contains an integer overflow vulnerability in sqfs_read_directory_table() function when allocating the directory table buffer.","description":"U-Boot before 2026.10-rc4 contains an integer overflow vulnerability in sqfs_read_directory_table() function when allocating the directory table buffer. Attackers can supply a crafted SquashFS image with an attacker-controlled superblock metablks_count value that causes heap buffer under-allocation and out-of-bounds writes, corrupting heap memory and crashing the bootloader.","published":"2026-09-29T22:18:22.000Z","lastModified":"2026-10-02T13:17:54.000Z","status":"Awaiting Analysis","sourceIdentifier":"disclosure@vulncheck.com","cvss":{"version":"4.0","score":5.2,"severity":"MEDIUM","vector":"CVSS:4.0/AV:P/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/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"},"cwe":["CWE-190"],"affected":[],"epss":{"score":0.00185,"percentile":0.08037,"date":"2026-10-27","history":[{"date":"2026-09-30","score":0.00185,"percentile":0.07302}]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"low","text":"Lower severity and a low EPSS score (0.18%). Track it; it rarely justifies an emergency change on its own."},"changes":[{"kind":"new","label":"New CVE","at":"2026-09-29T22:18:22.000Z","detail":{"score":"5.2","severity":"MEDIUM","publishedAt":"2026-09-29T22:18:22.080Z"},"summary":"New CVE, medium severity (CVSS 5.2)."}],"references":[{"url":"https://github.com/u-boot/u-boot","source":"disclosure@vulncheck.com"},{"url":"https://github.com/u-boot/u-boot/blob/v2026.07/fs/squashfs/sqfs.c#L814","source":"disclosure@vulncheck.com"},{"url":"https://github.com/u-boot/u-boot/commit/561ae28cb56a082cfa90c1c421c4955bc215470b","source":"disclosure@vulncheck.com"},{"url":"https://www.vulncheck.com/advisories/u-boot-before-2026.10-rc4-integer-overflow-in-squashfs-directory-table-allocation","source":"disclosure@vulncheck.com"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-71973","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}