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.
総合評価: CVE-2025-26595 は中リスク(42.3/100)。CVSS 深刻度は高。悪用される可能性が高い(EPSS 0.39%、31 パーセンタイル) 推奨対応: 影響資産を整理し、修補計画に組み込んでください。
リスクは変動します。再評価に基づき、本ページの表示内容を更新しています。
EPSS は日次で悪用されやすさの相対度合いを推定します。パーセンタイルは採点済み CVE の中での相対位置(高いほど相対的に深刻)を示します。
| # | 日付 | 旧 EPSS スコア | 新 EPSS スコア | Δ(新 − 旧) |
|---|---|---|---|---|
| 1 | 2026-06-15 | 0.02% | 0.39% | +0.37% |
| 2 | 2026-04-05 | 0.05% | 0.02% | -0.03% |
| 3 | 2025-12-22 | — | 0.05% | — |
EPSS の全履歴 (全 6 件)
この CVE の CVSS 指標。
| ベーススコア | バージョン | 深刻度 | ベクトル | 悪用しやすさ | 影響 | スコアの出典 |
|---|---|---|---|---|---|---|
| 7.8 | 3.1 | HIGH |
|
1.8 | 5.9 | [email protected] |
| 7.8 | 3.1 | HIGH |
|
1.8 | 5.9 | [email protected] |
| vendor | priority | summary | link |
|---|---|---|---|
alpine
|
— | CVE-2025-26595: 2 source package rows (xorg-server, xwayland); 6 state rows across 3 repos (3.21-community, 3.22-community, edge-community); fixed 6, open 0. | https://security.alpinelinux.org/vuln/CVE-2025-26595 |
debian
|
not yet assigned | CVE-2025-26595 not yet assigned priority: Debian including 2 source packages (xorg-server, xwayland), 9 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 8, open 1. | https://security-tracker.debian.org/tracker/CVE-2025-26595 |
gentoo
|
high | CVE-2025-26595: 1 GLSA(s) (202506-04), 2 atom(s) (x11-base/xorg-server, x11-base/xwayland); latest impact high. | https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2025-26595 |
redhat
|
high | — | https://access.redhat.com/security/cve/CVE-2025-26595 |
suse
|
medium | CVE-2025-26595 severity moderate: SUSE including 324 source package names (21:libxkbfile1-1.0.9-150000.3.3.1, 21:xorg-x11-server-21.1.11-150600.5.6.1, …), 576 product×package rows across 134 product lines (Container suse/kiosk/xorg, Image SLES12-SP5-Azure-SAP-BYOS, … (134 product lines)): Fixed 344, Known Affected 231, Known Not Affected 1. | https://www.suse.com/security/cve/CVE-2025-26595/ |
ubuntu
|
medium | CVE-2025-26595 medium priority: Ubuntu including 7 source packages (xorg, xorg-hwe-16.04, …), 58 status rows across 10 suites (bionic, focal, jammy, noble, oracular, plucky, questing, trusty, upstream, xenial): DNE 25, released 17, not-affected 13, needs-triage 3. | https://ubuntu.com/security/CVE-2025-26595 |
| ベンダー | 製品 | バージョン | 生の CPE |
|---|---|---|---|
| tigervnc | tigervnc | — | cpe:2.3:a:tigervnc:tigervnc:-:*:*:*:*:*:*:* |
| x.org | x_server | < 21.1.16 | cpe:2.3:a:x.org:x_server:*:*:*:*:*:*:*:* |
| x.org | xwayland | < 24.1.6 | cpe:2.3:a:x.org:xwayland:*:*:*:*:*:*:*:* |
| redhat | enterprise_linux | 7.0 | cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:* |
| redhat | enterprise_linux | 8.0 | cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:* |
| redhat | enterprise_linux | 9.0 | cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:* |