{"cve":"CVE-2025-26599","nvd":{"published":"2025-02-25T16:15:39.163","modified":"2026-06-29T21:16:34.477","status":"Modified","description":"An access to an uninitialized pointer flaw was found in X.Org and Xwayland. The function compCheckRedirect() may fail if it cannot allocate the backing pixmap. In that case, compRedirectWindow() will return a BadAlloc error without validating the window tree marked just before, which leaves the validated data partly initialized and the use of an uninitialized pointer later.","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-824"],"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-2025-26599","score":0.00405,"percentile":0.34737,"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."]}