{"cve":"CVE-2023-2640","nvd":{"published":"2023-07-26T02:15:09.300","modified":"2026-06-17T05:53:04.680","status":"Modified","description":"On Ubuntu kernels carrying both c914c0e27eb0 and \"UBUNTU: SAUCE: overlayfs: Skip permission checking for trusted.overlayfs.* xattrs\", an unprivileged user may set privileged extended attributes on the mounted files, leading them to be set on the upper files without the appropriate security checks.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","score":7.8},"cwes":["CWE-863"],"references":["https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-2640","https://lists.ubuntu.com/archives/kernel-team/2023-July/140923.html","https://ubuntu.com/security/notices/USN-6250-1","https://wiz.io/blog/ubuntu-overlayfs-vulnerability","https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-2640"],"products":["canonical:ubuntu_linux"],"source":"nvd","synced_at":"2026-10-19T21:38:35.729974749+00:00"},"epss":{"cve":"CVE-2023-2640","score":0.15199,"percentile":0.96753,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}