{"id":"CVE-2025-26596","summary":"Xorg: xwayland: heap overflow in xkbwritekeysyms()","details":"A heap overflow flaw was found in X.Org and Xwayland. The computation of the length in XkbSizeKeySyms() differs from what is written in XkbWriteKeySyms(), which may lead to a heap-based buffer overflow.","modified":"2026-05-18T05:58:05.053756102Z","published":"2025-02-25T15:54:23.693Z","related":["ALSA-2025:2500","ALSA-2025:2502","ALSA-2025:7163","ALSA-2025:7165","SUSE-SU-2025:0729-1","SUSE-SU-2025:0730-1","SUSE-SU-2025:0731-1","SUSE-SU-2025:0732-1","SUSE-SU-2025:0733-1","SUSE-SU-2025:0734-1","openSUSE-SU-2025:14841-1","openSUSE-SU-2025:14842-1"],"database_specific":{"cwe_ids":["CWE-787"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/26xxx/CVE-2025-26596.json","cna_assigner":"redhat"},"references":[{"type":"WEB","url":"https://access.redhat.com/downloads/content/package-browser/"},{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2025/02/msg00036.html"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2025:2500"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2025:2502"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2025:2861"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2025:2862"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2025:2865"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2025:2866"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2025:2873"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2025:2874"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2025:2875"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2025:2879"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2025:2880"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2025:3976"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2025:7163"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2025:7165"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2025:7458"},{"type":"ADVISORY","url":"https://access.redhat.com/security/cve/CVE-2025-26596"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/26xxx/CVE-2025-26596.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-26596"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2345256"},{"type":"PACKAGE","url":"https://gitlab.freedesktop.org/xorg/xserver/"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://gitlab.freedesktop.org/xorg/xserver","events":[{"introduced":"0"},{"fixed":"b7f84e6d509c004a7abb514af75b94cb907d451b"},{"fixed":"5b1d9da00f217d3b52bfd3cc862dff79a9433e63"}],"database_specific":{"extracted_events":[{"introduced":"0"},{"fixed":"21.1.16"},{"introduced":"22.0.0"},{"fixed":"24.1.6"}],"source":"AFFECTED_FIELD"}}],"versions":["xwayland-24.1.5","xorg-server-21.1.15","xwayland-24.1.4","xorg-server-21.1.14","xwayland-24.1.3","xwayland-24.1.2","xwayland-24.1.1","xwayland-24.1.0","xwayland-24.0.99.902","xorg-server-21.1.13","xwayland-24.0.99.901","xorg-server-21.1.12","xorg-server-21.1.11","xorg-server-21.1.10","xorg-server-21.1.9","xorg-server-21.1.8","xorg-server-21.1.7","xorg-server-21.1.6","xorg-server-21.1.5","xorg-server-21.1.4","xorg-server-21.1.3","xorg-server-21.1.2","xorg-server-21.1.1","xorg-server-21.1.0","xorg-server-21.0.99.902","xorg-server-21.0.99.901","xorg-server-21.0.99.1","xorg-server-1.20.0","xorg-server-1.19.99.905","xorg-server-1.19.99.904","xorg-server-1.19.99.903","xorg-server-1.19.99.902","xorg-server-1.19.99.901","xorg-server-1.19.0","xorg-server-1.18.99.902","xorg-server-1.18.99.901","xorg-server-1.18.99.2","xorg-server-1.18.0","xorg-server-1.17.99.902","xorg-server-1.17.99.901","xorg-server-1.17.0","xorg-server-1.16.99.902","xorg-server-1.16.99.901","xorg-server-1.16.0","xorg-server-1.15.99.904","xorg-server-1.15.99.903","xorg-server-1.15.99.902","xorg-server-1.15.99.901","xorg-server-1.15.0","xorg-server-1.14.99.905","xorg-server-1.14.99.904","xorg-server-1.14.99.903","xorg-server-1.14.99.902","xorg-server-1.14.99.901","xorg-server-1.14.99.3","xorg-server-1.14.99.2","xorg-server-1.14.99.1","xorg-server-1.14.0","xorg-server-1.13.99.902","xorg-server-1.13.99.901","xorg-server-1.13.0","xorg-server-1.12.99.905","xorg-server-1.12.99.904","xorg-server-1.12.99.903","xorg-server-1.12.99.902","xorg-server-1.12.99.901","xorg-server-1.12.0","xorg-server-1.11.99.903","xorg-server-1.11.99.902","xorg-server-1.11.99.901","xorg-server-1.11.99.1","xorg-server-1.11.0","xorg-server-1.10.99.902","xorg-server-1.10.99.901","xorg-server-1.10.0","xorg-server-1.9.99.903","xorg-server-1.9.99.902","xorg-server-1.9.99.901","xorg-server-1.9.0","xorg-server-1.8.99.906","xorg-server-1.8.99.905","xorg-server-1.8.99.904","xorg-server-1.8.99.903","xorg-server-1.8.99.902","xorg-server-1.8.99.901","xorg-server-1.8.0","xorg-server-1.7.99.902","xorg-server-1.7.99.901","xorg-server-1.7.99.2","xorg-server-1.7.99.1","xorg-server-1.6.99.901","xorg-server-1.6.99.900","xorg-server-1.5.99.1","xorg-server-1.1.99.3","xorg-server-1_1_99_2","xorg-server-1_0_99_901","XORG-7_0_99_901","xorg-server-1_1_99_1","xorg-server-1_0_99_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