{"cve":"CVE-2025-26595","nvd":{"published":"2025-02-25T16:15:38.390","modified":"2026-06-29T21:16:33.440","status":"Modified","description":"A buffer overflow flaw was found in X.Org and Xwayland. The code in XkbVModMaskText() allocates a fixed-sized buffer on the stack and copies the names of the virtual modifiers to that buffer. The code fails to check the bounds of the buffer and would copy the data regardless of the size.","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-787","CWE-121"],"references":["https://access.redhat.com/errata/RHSA-2025:2500","https://access.redhat.com/errata/RHSA-2025:2502","https://access.redhat.com/errata/RHSA-2025:2861","https://access.redhat.com/errata/RHSA-2025:2862","https://access.redhat.com/errata/RHSA-2025:2865"],"products":["redhat:enterprise_linux","tigervnc:tigervnc","x.org:x_server","x.org:xwayland"],"source":"nvd","synced_at":"2026-10-19T21:59:48.811064707+00:00"},"epss":{"cve":"CVE-2025-26595","score":0.00438,"percentile":0.38039,"date":"2026-11-01"},"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."]}