GHSA-r9hf-rxjm-gv2f · 深刻度： medium — Issue summary: A type confusion vulnerability exists in the signature verification of signed PKCS...
Issue summary: A type confusion vulnerability exists in the signature verification of signed PKCS#7 data where an ASN1_TYPE union member is accessed without first validating the type, causing an invalid or NULL pointer dereference when processing malformed PKCS#7 data. Impact summary: An application performing signature verification of PKCS#7 data or calling directly the PKCS7_digest_from_attributes() function can be caused to dereference an invalid or NULL pointer when reading, resulting in a Denial of Service. The function PKCS7_digest_from_attributes() accesses the message digest attribute value without validating its type. When the type is not V_ASN1_OCTET_STRING, this results in accessing invalid memory through the ASN1_TYPE union, causing a crash. Exploiting this vulnerability requires an attacker to provide a malformed signed PKCS#7 to an application that verifies it. The impact of the exploit is just a Denial of Service, the PKCS7 API is legacy and applications should be using the CMS API instead. For these reasons the issue was assessed as Low severity. The FIPS modules in 3.5, 3.4, 3.3 and 3.0 are not affected by this issue, as the PKCS#7 parsing implementation is outside the OpenSSL FIPS module boundary. OpenSSL 3.6, 3.5, 3.4, 3.3, 3.0, 1.1.1 and 1.0.2 are vulnerable to this issue.
総合評価: CVE-2026-22796 は中リスク（45/100）。CVSS 深刻度は中。悪用される可能性が高い（EPSS 0.52%、67 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 | 2026-05-29 | 0.23% | 0.52% | +0.29% |
| 2 | 2026-05-13 | 0.07% | 0.23% | +0.16% |
| 3 | 2026-01-28 | — | 0.07% | — |
EPSS の全履歴 （全 3 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 |
|---|---|---|---|---|---|---|
| 5.3 | 3.1 | MEDIUM |
|
3.9 | 1.4 | 134c704f-9b21-4f2e-91b3-4a467353bcc0 |
GHSA-r9hf-rxjm-gv2f · 深刻度： medium — Issue summary: A type confusion vulnerability exists in the signature verification of signed PKCS...
| vendor | priority | summary | link |
|---|---|---|---|
alpine
|
— | CVE-2026-22796: 1 source package rows (openssl); 147 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 142. | https://security.alpinelinux.org/vuln/CVE-2026-22796 |
debian
|
not yet assigned | CVE-2026-22796 not yet assigned 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-2026-22796 |
redhat
|
low | — | https://access.redhat.com/security/cve/CVE-2026-22796 |
suse
|
medium | CVE-2026-22796 severity moderate: SUSE including 450 source package names (1.1.1-1.15:libopenssl3-3.2.3-150700.5.24.1, 1.1.1-1.15:openssl-3-3.2.3-150700.5.24.1, …), 1465 product×package rows across 299 product lines (Container private-registry/harbor-core, Container private-registry/harbor-exporter, … (299 product lines)): Fixed 1162, Known Affected 231, Known Not Affected 65, First Fixed 7. | https://www.suse.com/security/cve/CVE-2026-22796/ |
ubuntu
|
low | CVE-2026-22796 low priority: Ubuntu including 4 source packages (edk2, nodejs, openssl, openssl1.0), 32 status rows across 9 suites (bionic, focal, jammy, noble, plucky, questing, trusty, upstream, xenial): needs-triage 11, released 9, not-affected 5, DNE 4, ignored 2, needed 1. | https://ubuntu.com/security/CVE-2026-22796 |
| ベンダー | 製品 | バージョン | 生の CPE |
|---|---|---|---|
| openssl | openssl | >= 1.0.2, < 1.0.2zn | cpe:2.3:a:openssl:openssl:*:*:*:*:*:*:*:* |
| openssl | openssl | >= 1.1.1, < 1.1.1ze | cpe:2.3:a:openssl:openssl:*:*:*:*:*:*:*:* |
| openssl | openssl | >= 3.0.0, < 3.0.19 | cpe:2.3:a:openssl:openssl:*:*:*:*:*:*:*:* |
| openssl | openssl | >= 3.3.0, < 3.3.6 | cpe:2.3:a:openssl:openssl:*:*:*:*:*:*:*:* |
| openssl | openssl | >= 3.4.0, < 3.4.4 | cpe:2.3:a:openssl:openssl:*:*:*:*:*:*:*:* |
| openssl | openssl | >= 3.5.0, < 3.5.5 | cpe:2.3:a:openssl:openssl:*:*:*:*:*:*:*:* |
| openssl | openssl | >= 3.6.0, < 3.6.1 | cpe:2.3:a:openssl:openssl:*:*:*:*:*:*:*:* |