On 64-bit platforms IonMonkey-JIT only wrote 32 bits of the 64-bit return value space on the stack. Baseline-JIT, however, read the entire 64 bits. This vulnerability was fixed in Firefox 141, Firefox ESR 115.26, Firefox ESR 128.13, Firefox ESR 140.1, Thunderbird 141, Thunderbird 128.13, and Thunderbird 140.1.
総合評価: CVE-2025-8027 は低リスク（35.4/100）。CVSS 深刻度は中。悪用される可能性が高い（EPSS 0.35%、27 パーセンタイル） 推奨対応: 悪用情報と EPSS の推移を監視し、必要に応じて優先度を見直してください。
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 | 2026-06-22 | 0.34% | 0.35% | +0.01% |
| 2 | 2026-06-15 | 0.49% | 0.34% | -0.15% |
| 3 | 2026-05-18 | — | 0.49% | — |
EPSS の全履歴 （全 7 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 |
|---|---|---|---|---|---|---|
| 6.5 | 3.1 | MEDIUM |
|
2.8 | 3.6 | 134c704f-9b21-4f2e-91b3-4a467353bcc0 |
| vendor | priority | summary | link |
|---|---|---|---|
alpine
|
— | CVE-2025-8027: 3 source package rows (firefox, firefox-esr, thunderbird); 381 state rows across 2 repos (3.22-community, edge-community); fixed 0, open 381. | https://security.alpinelinux.org/vuln/CVE-2025-8027 |
debian
|
not yet assigned | CVE-2025-8027 not yet assigned priority: Debian including 3 source packages (firefox, firefox-esr, thunderbird), 11 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 11. | https://security-tracker.debian.org/tracker/CVE-2025-8027 |
redhat
|
high | — | https://access.redhat.com/security/cve/CVE-2025-8027 |
suse
|
high | CVE-2025-8027 severity important: SUSE including 79 source package names (2.1.3-4.11:qemu-guest-agent-8.2.7-1.1, MozillaFirefox-140.1.0-112.273.1, …), 356 product×package rows across 47 product lines (Container suse/sl-micro/6.0/kvm-os-container, Image SLES12-SP5-SAP-Azure-LI-BYOS-Production, … (47 product lines)): Fixed 353, First Fixed 3. | https://www.suse.com/security/cve/CVE-2025-8027/ |
ubuntu
|
medium | CVE-2025-8027 medium priority: Ubuntu including 9 source packages (firefox, mozjs102, …), 49 status rows across 7 suites (bionic, focal, jammy, noble, plucky, questing, upstream): DNE 22, ignored 9, needs-triage 9, not-affected 7, released 2. | https://ubuntu.com/security/CVE-2025-8027 |
| ベンダー | 製品 | バージョン | 生の CPE |
|---|---|---|---|
| mozilla | firefox | < 115.26.0 | cpe:2.3:a:mozilla:firefox:*:*:*:*:esr:*:*:* |
| mozilla | firefox | < 141.0 | cpe:2.3:a:mozilla:firefox:*:*:*:*:-:*:*:* |
| mozilla | firefox | >= 128.0, < 128.13.0 | cpe:2.3:a:mozilla:firefox:*:*:*:*:esr:*:*:* |
| mozilla | firefox | >= 140.0, < 140.1.0 | cpe:2.3:a:mozilla:firefox:*:*:*:*:esr:*:*:* |
| mozilla | thunderbird | < 128.13.0 | cpe:2.3:a:mozilla:thunderbird:*:*:*:*:esr:*:*:* |
| mozilla | thunderbird | < 141.0 | cpe:2.3:a:mozilla:thunderbird:*:*:*:*:-:*:*:* |
| mozilla | thunderbird | >= 140.0, < 140.1.0 | cpe:2.3:a:mozilla:thunderbird:*:*:*:*:esr:*:*:* |
| URL | タグ |
|---|---|
| https://bugzilla.mozilla.org/show_bug.cgi?id=1968423 | Permissions Required |
| https://www.mozilla.org/security/advisories/mfsa2025-56/ | Vendor Advisory |
| https://www.mozilla.org/security/advisories/mfsa2025-57/ | Vendor Advisory |
| https://www.mozilla.org/security/advisories/mfsa2025-58/ | Vendor Advisory |
| https://www.mozilla.org/security/advisories/mfsa2025-59/ | Vendor Advisory |
| https://www.mozilla.org/security/advisories/mfsa2025-61/ | Vendor Advisory |
| https://www.mozilla.org/security/advisories/mfsa2025-62/ | Vendor Advisory |
| https://www.mozilla.org/security/advisories/mfsa2025-63/ | Vendor Advisory |
| https://lists.debian.org/debian-lts-announce/2025/07/msg00016.html |