A flaw was found in libarchive. A NULL pointer dereference vulnerability exists in the ACL parsing logic, specifically within the archive_acl_from_text_nl() function. When processing a malformed ACL string (such as a bare "d" or "default" tag without subsequent fields), the function fails to perform adequate validation before advancing the pointer. An attacker can exploit this by providing a maliciously crafted archive, causing an application utilizing the libarchive API (such as bsdtar) to crash, resulting in a Denial of Service (DoS).
総合評価: CVE-2026-5745 は低リスク(22.7/100)。CVSS 深刻度は中。悪用される可能性が高い(EPSS 0.01%、2 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 | 2026-04-08 | — | 0.01% | — |
EPSS の全履歴 (全 1 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 |
|---|---|---|---|---|---|---|
| 5.5 | 3.1 | MEDIUM |
|
1.8 | 3.6 | [email protected] |
| vendor | priority | summary | link |
|---|---|---|---|
debian
|
unimportant | CVE-2026-5745 unimportant priority: Debian including 1 source packages (libarchive), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): open 5. | https://security-tracker.debian.org/tracker/CVE-2026-5745 |
redhat
|
medium | — | https://access.redhat.com/security/cve/CVE-2026-5745 |
suse
|
medium | CVE-2026-5745 severity moderate: SUSE including 1 source package names (cmake), 4 product×package rows across 4 product lines (SUSE Linux Enterprise Server 12 SP4-LTSS, SUSE Linux Enterprise Server 12 SP5-LTSS, SUSE Linux Enterprise Server 12 SP5-LTSS Extended Security, SUSE Linux Enterprise Server Teradata 12 SP3): Known Not Affected 4. | https://www.suse.com/security/cve/CVE-2026-5745/ |
ubuntu
|
medium | CVE-2026-5745 medium priority: Ubuntu including 1 source packages (libarchive), 9 status rows across 9 suites (bionic, focal, jammy, noble, questing, resolute, trusty, upstream, xenial): needed 8, needs-triage 1. | https://ubuntu.com/security/CVE-2026-5745 |
| ベンダー | 製品 | バージョン | 生の CPE |
|---|---|---|---|
| libarchive | libarchive | — | cpe:2.3:a:libarchive:libarchive:-:*:*:*:*:*:*:* |
| redhat | hardened_images | — | cpe:2.3:a:redhat:hardened_images:-:*:*:*:*:*:*:* |
| redhat | openshift_container_platform | 4.0 | cpe:2.3:a:redhat:openshift_container_platform:4.0:*:*:*:*:*:*:* |
| redhat | enterprise_linux | 6.0 | cpe:2.3:o:redhat:enterprise_linux:6.0:*:*:*:*:*:*:* |
| redhat | enterprise_linux | 7.0 | cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:* |
| redhat | enterprise_linux | 8.0 | cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:* |
| redhat | enterprise_linux | 9.0 | cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:* |
| redhat | enterprise_linux | 10.0 | cpe:2.3:o:redhat:enterprise_linux:10.0:*:*:*:*:*:*:* |
| URL | タグ |
|---|---|
| https://access.redhat.com/errata/RHSA-2026:8944 | |
| https://access.redhat.com/security/cve/CVE-2026-5745 | Third Party Advisory |
| https://bugzilla.redhat.com/show_bug.cgi?id=2455921 | Issue Tracking Third Party Advisory |