A use-after-free vulnerability was found in systemd. This issue occurs due to the on_stream_io() function and dns_stream_complete() function in 'resolved-dns-stream.c' not incrementing the reference counting for the DnsStream object. Therefore, other functions and callbacks called can dereference the DNSStream object, causing the use-after-free when the reference is still used later.
総合評価: CVE-2022-2526 は中リスク(60.2/100)。CVSS 深刻度は重大。悪用される可能性が高い(EPSS 1.05%、60 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 | 2026-06-20 | 1.01% | 1.05% | +0.04% |
| 2 | 2026-06-15 | 0.28% | 1.01% | +0.73% |
| 3 | 2026-02-16 | — | 0.28% | — |
EPSS の全履歴 (全 12 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] |
| vendor | priority | summary | link |
|---|---|---|---|
debian
|
not yet assigned | CVE-2022-2526 not yet assigned priority: Debian including 1 source packages (systemd), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. | https://security-tracker.debian.org/tracker/CVE-2022-2526 |
redhat
|
high | — | https://access.redhat.com/security/cve/CVE-2022-2526 |
suse
|
high | CVE-2022-2526 severity important: SUSE including 34 source package names (libgudev1-219-78.el7_9.7, libgudev1-devel-219-78.el7_9.7, …), 315 product×package rows across 39 product lines (SUSE CaaS Platform 4.0, SUSE Enterprise Storage 6, … (39 product lines)): Known Not Affected 297, Fixed 18. | https://www.suse.com/security/cve/CVE-2022-2526/ |
ubuntu
|
medium | CVE-2022-2526 medium priority: Ubuntu including 1 source packages (systemd), 6 status rows across 6 suites (bionic, focal, jammy, trusty, upstream, xenial): not-affected 4, released 2. | https://ubuntu.com/security/CVE-2022-2526 |
| ベンダー | 製品 | バージョン | 生の CPE |
|---|---|---|---|
| systemd_project | systemd | 240 | cpe:2.3:a:systemd_project:systemd:240:*:*:*:*:*:*:* |
| netapp | active_iq_unified_manager | — | cpe:2.3:a:netapp:active_iq_unified_manager:-:*:*:*:*:vmware_vsphere:*:* |
| netapp | h300s_firmware | — | cpe:2.3:o:netapp:h300s_firmware:-:*:*:*:*:*:*:* |
| netapp | h500s_firmware | — | cpe:2.3:o:netapp:h500s_firmware:-:*:*:*:*:*:*:* |
| netapp | h700s_firmware | — | cpe:2.3:o:netapp:h700s_firmware:-:*:*:*:*:*:*:* |
| netapp | h410s_firmware | — | cpe:2.3:o:netapp:h410s_firmware:-:*:*:*:*:*:*:* |
| URL | タグ |
|---|---|
| https://github.com/systemd/systemd/commit/d973d94dec349fb676fdd844f6fe2ada3538f27c | Patch Third Party Advisory |
| https://security.netapp.com/advisory/ntap-20221111-0005/ | Third Party Advisory |