On 64-bit CPUs, when the JIT compiles WASM i32 return values they can pick up bits from left over memory. This can potentially cause them to be treated as a different type. This vulnerability was fixed in Firefox 136, Firefox ESR 115.21, Firefox ESR 128.8, Thunderbird 136, and Thunderbird 128.8.
総合評価: CVE-2025-1933 は低リスク（37.5/100）。CVSS 深刻度は高。悪用される可能性が高い（EPSS 0.29%、21 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 | 2026-06-15 | 0.49% | 0.29% | -0.19% |
| 2 | 2026-04-19 | 0.38% | 0.49% | +0.11% |
| 3 | 2026-03-02 | — | 0.38% | — |
EPSS の全履歴 （全 16 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 |
|---|---|---|---|---|---|---|
| 7.6 | 3.1 | HIGH |
|
2.8 | 4.7 | 134c704f-9b21-4f2e-91b3-4a467353bcc0 |
| vendor | priority | summary | link |
|---|---|---|---|
alpine
|
— | CVE-2025-1933: 3 source package rows (firefox, firefox-esr, thunderbird); 342 state rows across 2 repos (3.22-community, edge-community); fixed 0, open 342. | https://security.alpinelinux.org/vuln/CVE-2025-1933 |
debian
|
not yet assigned | CVE-2025-1933 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-2025-1933 |
gentoo
|
high | CVE-2025-1933: 3 GLSA(s) (202505-02, 202505-03, 202505-08), 5 atom(s) (dev-lang/spidermonkey, mail-client/thunderbird, mail-client/thunderbird-bin, www-client/firefox, www-client/firefox-bin); latest impact high. | https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2025-1933 |
redhat
|
high | — | https://access.redhat.com/security/cve/CVE-2025-1933 |
suse
|
high | CVE-2025-1933 severity important: SUSE including 35 source package names (MozillaFirefox-128.8.0-112.249.3, MozillaFirefox-128.8.0-150200.152.173.1, …), 137 product×package rows across 48 product lines (Container suse/kiosk/firefox-esr, Image SLES12-SP5-SAP-Azure-LI-BYOS-Production, … (48 product lines)): Fixed 137. | https://www.suse.com/security/cve/CVE-2025-1933/ |
ubuntu
|
medium | CVE-2025-1933 medium priority: Ubuntu including 9 source packages (firefox, mozjs102, …), 65 status rows across 8 suites (bionic, focal, jammy, noble, oracular, plucky, questing, upstream): DNE 34, ignored 10, needs-triage 9, not-affected 9, released 3. | https://ubuntu.com/security/CVE-2025-1933 |
| ベンダー | 製品 | バージョン | 生の CPE |
|---|---|---|---|
| mozilla | firefox | < 115.21.0 | cpe:2.3:a:mozilla:firefox:*:*:*:*:esr:*:*:* |
| mozilla | firefox | < 136.0 | cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:* |
| mozilla | firefox | >= 116.0, < 128.8.0 | cpe:2.3:a:mozilla:firefox:*:*:*:*:esr:*:*:* |
| mozilla | thunderbird | < 128.8 | cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:* |
| mozilla | thunderbird | >= 129.0, < 136.0 | cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:* |
| URL | タグ |
|---|---|
| https://bugzilla.mozilla.org/show_bug.cgi?id=1946004 | Issue Tracking |
| https://www.mozilla.org/security/advisories/mfsa2025-14/ | Vendor Advisory |
| https://www.mozilla.org/security/advisories/mfsa2025-15/ | Vendor Advisory |
| https://www.mozilla.org/security/advisories/mfsa2025-16/ | Vendor Advisory |
| https://www.mozilla.org/security/advisories/mfsa2025-17/ | Vendor Advisory |
| https://www.mozilla.org/security/advisories/mfsa2025-18/ | Vendor Advisory |
| https://lists.debian.org/debian-lts-announce/2025/03/msg00006.html |