build_model in xmlparse.c in Expat (aka libexpat) before 2.4.3 has an integer overflow.
総合評価: CVE-2022-22823 は高リスク(72.7/100)。CVSS 深刻度は重大。悪用される可能性が高い(EPSS 3.38%、87 パーセンタイル) 根拠: 直近 1 日で EPSS が +2.94% 上昇。悪用への関心が高まっている可能性があります。 推奨対応: 悪用可能性が高いため、影響範囲の確認と修補の優先付けを推奨します。
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 | 0.43% | 3.38% | +2.94% |
| 2 | 2026-05-26 | 0.32% | 0.43% | +0.11% |
| 3 | 2026-05-22 | — | 0.32% | — |
EPSS の全履歴 (全 29 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] |
| 9.8 | 3.1 | CRITICAL |
|
3.9 | 5.9 | 134c704f-9b21-4f2e-91b3-4a467353bcc0 |
| 7.5 | 2.0 | HIGH |
|
10.0 | 6.4 | [email protected] |
| vendor | priority | summary | link |
|---|---|---|---|
alpine
|
— | CVE-2022-22823: 1 source package rows (expat); 8 state rows across 8 repos (3.12-main, 3.17-main, 3.18-main, 3.19-main, 3.20-main, 3.21-main, 3.22-main, edge-main); fixed 8, open 0. | https://security.alpinelinux.org/vuln/CVE-2022-22823 |
debian
|
not yet assigned | CVE-2022-22823 not yet assigned priority: Debian including 2 source packages (expat, libxmltok), 7 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5, open 2. | https://security-tracker.debian.org/tracker/CVE-2022-22823 |
gentoo
|
high | CVE-2022-22823: 1 GLSA(s) (202209-24), 1 atom(s) (dev-libs/expat); latest impact high. | https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2022-22823 |
redhat
|
high | — | https://access.redhat.com/security/cve/CVE-2022-22823 |
suse
|
high | CVE-2022-22823 severity important: SUSE including 327 source package names (0.1.0:libexpat1-2.2.5-3.9.1, 0.1.75:libexpat1-2.2.5-3.9.1, …), 568 product×package rows across 156 product lines (Container bci/bci-init, Container bci/golang, … (156 product lines)): Fixed 398, Known Affected 166, Known Not Affected 4. | https://www.suse.com/security/cve/CVE-2022-22823/ |
ubuntu
|
medium | CVE-2022-22823 medium priority: Ubuntu including 24 source packages (apache2, apr-util, …), 359 status rows across 15 suites (bionic, focal, hirsute, impish, jammy, kinetic, lunar, mantic, noble, oracular, plucky, questing, trusty, upstream, xenial): not-affected 105, DNE 91, needs-triage 65, ignored 64, released 34. | https://ubuntu.com/security/CVE-2022-22823 |
| ベンダー | 製品 | バージョン | 生の CPE |
|---|---|---|---|
| libexpat_project | libexpat | < 2.4.3 | cpe:2.3:a:libexpat_project:libexpat:*:*:*:*:*:*:*:* |
| tenable | nessus | < 8.15.3 | cpe:2.3:a:tenable:nessus:*:*:*:*:*:*:*:* |
| tenable | nessus | >= 10.0.0, < 10.1.1 | cpe:2.3:a:tenable:nessus:*:*:*:*:*:*:*:* |
| debian | debian_linux | 10.0 | cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* |
| debian | debian_linux | 11.0 | cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:* |
| siemens | sinema_remote_connect_server | < 3.1 | cpe:2.3:a:siemens:sinema_remote_connect_server:*:*:*:*:*:*:*:* |
| URL | タグ |
|---|---|
| http://www.openwall.com/lists/oss-security/2022/01/17/3 | Mailing List Third Party Advisory |
| https://cert-portal.siemens.com/productcert/pdf/ssa-484086.pdf | Patch Third Party Advisory |
| https://github.com/libexpat/libexpat/pull/539 | Third Party Advisory |
| https://security.gentoo.org/glsa/202209-24 | Third Party Advisory |
| https://www.debian.org/security/2022/dsa-5073 | Third Party Advisory |
| https://www.tenable.com/security/tns-2022-05 | Third Party Advisory |