In affected libpcap versions during the setup of a remote packet capture the internal function sock_initaddress() calls getaddrinfo() and possibly freeaddrinfo(), but does not clearly indicate to the caller function whether freeaddrinfo() still remains to be called after the function returns. This makes it possible in some scenarios that both the function and its caller call freeaddrinfo() for the same allocated memory block. A similar problem was reported in Apple libpcap, to which Apple assigned CVE-2023-40400.
総合評価: CVE-2023-7256 は低リスク（22.1/100）。CVSS 深刻度は中。悪用される可能性が高い（EPSS 0.22%、12 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 | 2026-06-15 | 0.01% | 0.22% | +0.21% |
| 2 | 2025-11-21 | 0.07% | 0.01% | -0.05% |
| 3 | 2025-11-18 | — | 0.07% | — |
EPSS の全履歴 （全 8 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 |
|---|---|---|---|---|---|---|
| 4.4 | 3.1 | MEDIUM |
|
0.8 | 3.6 | [email protected] |
| 4.4 | 3.1 | MEDIUM |
|
0.8 | 3.6 | [email protected] |
| vendor | priority | summary | link |
|---|---|---|---|
alpine
|
medium | CVE-2023-7256: 1 source package rows (libpcap); 4 state rows across 4 repos (3.17-main, 3.18-main, 3.19-main, 3.20-main); fixed 0, open 4. | https://security.alpinelinux.org/vuln/CVE-2023-7256 |
debian
|
unimportant | CVE-2023-7256 unimportant priority: Debian including 1 source packages (libpcap), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 3, open 2. | https://security-tracker.debian.org/tracker/CVE-2023-7256 |
redhat
|
medium | — | https://access.redhat.com/security/cve/CVE-2023-7256 |
suse
|
medium | CVE-2023-7256 severity moderate: SUSE including 266 source package names (13.2-3.13.33:libpcap1-1.9.1-150300.3.3.1, 13.2-3.5.37:libpcap1-1.10.1-150400.3.3.2, …), 482 product×package rows across 228 product lines (Container suse/sl-micro/6.0/baremetal-os-container, Container suse/sl-micro/6.0/base-os-container, … (228 product lines)): Fixed 257, Known Affected 216, Will Not Fix 9. | https://www.suse.com/security/cve/CVE-2023-7256/ |
ubuntu
|
medium | CVE-2023-7256 medium priority: Ubuntu including 1 source packages (libpcap), 7 status rows across 7 suites (bionic, focal, jammy, noble, trusty, upstream, xenial): not-affected 6, released 1. | https://ubuntu.com/security/CVE-2023-7256 |