Path Traversal in Linuxfoundation Automotive Grade Linux
CVE-2026-37531
AGL app-framework-main thru 17.1.12 contains a Zip Slip path traversal vulnerability (CWE-22) combined with a TOCTOU race condition (CWE-367) in the widget installation flow. The is_valid_filename function in wgtpkg-zip.c validates ZIP entry names but does not check for dot notation directory traversal sequences it only blocks absolute paths. The zread extraction function uses openat(workdirfd, filename, O_CREAT) which resolves dot notation values relative to the work directory, allowing files to be written anywhere on the filesystem. Critically, in function install_widget in file wgtpkg-install.c, extraction via zread occurs BEFORE signature verification via check_all_signatures. Even if signature verification fails, the error cleanup (remove_workdir) only deletes the temporary work directory files written outside via path traversal persist permanently.
Vulnerability class: Path Traversal (Directory Traversal)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.009 (56.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 57th percentile — 56.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.007 · newest: 0.009 · change: +0.001
Affected products
Weakness classification (CWE)
References
- gerrit.automotivelinux.org/gerrit/src/app-framework-main (Broken Link)
- gist.github.com/sgInnora/8526eedcfd826d05ef1fc45d8f405643 (Third Party Advisory)
Frequently asked questions
- What is CVE-2026-37531?
- CVE-2026-37531 is a critical-severity vulnerability in Linuxfoundation Automotive Grade Linux, classified under Path Traversal. CVSS score: 9.8/10. Published 2026-05-01.
- How severe is CVE-2026-37531?
- Critical severity. CVSS v3 base score is 9.8 out of 10.