GHSA-j79m-9jxq-788r · 深刻度： critical — Issue summary: Converting an excessively large OCTET STRING value to a hexadecimal string leads...
Issue summary: Converting an excessively large OCTET STRING value to a hexadecimal string leads to a heap buffer overflow on 32 bit platforms. Impact summary: A heap buffer overflow may lead to a crash or possibly an attacker controlled code execution or other undefined behavior. If an attacker can supply a crafted X.509 certificate with an excessively large OCTET STRING value in extensions such as the Subject Key Identifier (SKID) or Authority Key Identifier (AKID) which are being converted to hex, the size of the buffer needed for the result is calculated as multiplication of the input length by 3. On 32 bit platforms, this multiplication may overflow resulting in the allocation of a smaller buffer and a heap buffer overflow. Applications and services that print or log contents of untrusted X.509 certificates are vulnerable to this issue. As the certificates would have to have sizes of over 1 Gigabyte, printing or logging such certificates is a fairly unlikely operation and only 32 bit platforms are affected, this issue was assigned Low severity. The FIPS modules in 3.6, 3.5, 3.4, 3.3 and 3.0 are not affected by this issue, as the affected code is outside the OpenSSL FIPS module boundary.
総合評価: CVE-2026-31789 は中リスク（44/100）。CVSS 深刻度は重大。悪用される可能性が高い（EPSS 0.22%、13 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 | 0.01% | 0.22% | +0.21% |
| 2 | 2026-04-08 | — | 0.01% | — |
EPSS の全履歴 （全 2 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 |
|---|---|---|---|---|---|---|
| 9.8 | 3.1 | CRITICAL |
|
3.9 | 5.9 | [email protected] |
| 5.8 | 3.1 | MEDIUM |
|
1.0 | 4.7 | 134c704f-9b21-4f2e-91b3-4a467353bcc0 |
GHSA-j79m-9jxq-788r · 深刻度： critical — Issue summary: Converting an excessively large OCTET STRING value to a hexadecimal string leads...
| vendor | priority | summary | link |
|---|---|---|---|
alpine
|
— | CVE-2026-31789: 1 source package rows (openssl); 5 state rows across 5 repos (3.20-main, 3.21-main, 3.22-main, 3.23-main, edge-main); fixed 5, open 0. | https://security.alpinelinux.org/vuln/CVE-2026-31789 |
debian
|
unimportant | CVE-2026-31789 unimportant priority: Debian including 1 source packages (openssl), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. | https://security-tracker.debian.org/tracker/CVE-2026-31789 |
redhat
|
low | — | https://access.redhat.com/security/cve/CVE-2026-31789 |
suse
|
high | CVE-2026-31789 severity important: SUSE including 391 source package names (1.1.2-2.16:libopenssl3-3.2.3-150700.5.31.1, 1.1.2-2.16:openssl-3-3.2.3-150700.5.31.1, …), 732 product×package rows across 97 product lines (Container private-registry/harbor-core, Container private-registry/harbor-exporter, … (97 product lines)): Fixed 416, Known Affected 231, Known Not Affected 70, First Fixed 15. | https://www.suse.com/security/cve/CVE-2026-31789/ |
ubuntu
|
low | CVE-2026-31789 low priority: Ubuntu including 5 source packages (edk2, nodejs, openssl, openssl-fips, openssl1.0), 37 status rows across 9 suites (bionic, focal, jammy, noble, questing, resolute, trusty, upstream, xenial): not-affected 17, DNE 8, released 5, needs-triage 4, needed 3. | https://ubuntu.com/security/CVE-2026-31789 |
| ベンダー | 製品 | バージョン | 生の CPE |
|---|---|---|---|
| openssl | openssl | >= 3.0.0, < 3.0.20 | cpe:2.3:a:openssl:openssl:*:*:*:*:*:*:*:* |
| openssl | openssl | >= 3.3.0, < 3.3.7 | cpe:2.3:a:openssl:openssl:*:*:*:*:*:*:*:* |
| openssl | openssl | >= 3.4.0, < 3.4.5 | cpe:2.3:a:openssl:openssl:*:*:*:*:*:*:*:* |
| openssl | openssl | >= 3.5.0, < 3.5.6 | cpe:2.3:a:openssl:openssl:*:*:*:*:*:*:*:* |
| openssl | openssl | >= 3.6.0, < 3.6.2 | cpe:2.3:a:openssl:openssl:*:*:*:*:*:*:*:* |