LIBPNG is a reference library for use in applications that read, create, and manipulate PNG (Portable Network Graphics) raster image files. Prior to 1.6.52, an out-of-bounds read vulnerability in libpng's simplified API allows reading up to 1012 bytes beyond the png_sRGB_base[512] array when processing valid palette PNG images with partial transparency and gamma correction. The PNG files that trigger this vulnerability are valid per the PNG specification; the bug is in libpng's internal state management. Upgrade to libpng 1.6.52 or later.
総合評価: CVE-2025-66293 は公開エクスプロイトあり(50.9/100)。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) 根拠: 公開エクスプロイトが 2 件参照されています(Exploit-DB)。 推奨対応: 公開エクスプロイトが確認されています。影響範囲の確認、緩和策の適用、パッチ適用を優先してください。
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。
| EDB-ID | ソース | 種別 | 公開 | リンク |
|---|---|---|---|---|
| — | nvd_ref | exploit_tag | Exploit-DB ↗ | |
| — | nvd_ref | exploit_tag | Exploit-DB ↗ |
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 | 0.14% | 0.29% | +0.16% |
| 2 | 2026-05-23 | 0.15% | 0.14% | -0.02% |
| 3 | 2026-05-22 | — | 0.15% | — |
EPSS の全履歴 (全 5 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 |
|---|---|---|---|---|---|---|
| 7.1 | 3.1 | HIGH |
|
2.8 | 4.2 | [email protected] |
| vendor | priority | summary | link |
|---|---|---|---|
alpine
|
— | CVE-2025-66293: 1 source package rows (libpng); 23 state rows across 6 repos (3.19-main, 3.20-main, 3.21-main, 3.22-main, 3.23-main, edge-main); fixed 5, open 18. | https://security.alpinelinux.org/vuln/CVE-2025-66293 |
debian
|
not yet assigned | CVE-2025-66293 not yet assigned priority: Debian including 1 source packages (libpng1.6), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. | https://security-tracker.debian.org/tracker/CVE-2025-66293 |
redhat
|
high | — | https://access.redhat.com/security/cve/CVE-2025-66293 |
suse
|
high | CVE-2025-66293 severity important: SUSE including 290 source package names (2.0.4-5.8.229:libpng16-16-1.6.34-150000.3.12.1, 2.1.3-7.76:libpng16-16-1.6.43-slfo.1.1_2.1, …), 794 product×package rows across 317 product lines (Container private-registry/harbor-portal, Container suse/manager/5.0/x86_64/server, … (317 product lines)): Fixed 465, Known Affected 231, Known Not Affected 91, First Fixed 7. | https://www.suse.com/security/cve/CVE-2025-66293/ |
ubuntu
|
medium | CVE-2025-66293 medium priority: Ubuntu including 5 source packages (chromium-browser, firefox, libpng, libpng1.6, thunderbird), 30 status rows across 9 suites (bionic, focal, jammy, noble, plucky, questing, trusty, upstream, xenial): not-affected 13, released 9, DNE 4, needs-triage 3, ignored 1. | https://ubuntu.com/security/CVE-2025-66293 |
| URL | タグ |
|---|---|
| https://github.com/pnggroup/libpng/commit/788a624d7387a758ffd5c7ab010f1870dea753a1 | Patch |
| https://github.com/pnggroup/libpng/commit/a05a48b756de63e3234ea6b3b938b8f5f862484a | Patch |
| https://github.com/pnggroup/libpng/issues/764 | Exploit Issue Tracking Patch |
| https://github.com/pnggroup/libpng/security/advisories/GHSA-9mpm-9pxh-mg4f | Exploit Vendor Advisory |
| http://www.openwall.com/lists/oss-security/2025/12/03/6 | Mailing List |
| http://www.openwall.com/lists/oss-security/2025/12/03/7 | Mailing List |
| http://www.openwall.com/lists/oss-security/2025/12/03/8 | Mailing List |