For migration as well as to work around kernels unaware of L1TF (see XSA-273), PV guests may be run in shadow paging mode. Since Xen itself needs to be mapped when PV guests run, Xen and shadowed PV guests run directly the respective shadow page tables. For 64-bit PV guests this means running on the shadow of the guest root page table. In the course of dealing with shortage of memory in the shadow pool associated with a domain, shadows of page tables may be torn down. This tearing down may include the shadow root page table that the CPU in question is presently running on. While a precaution exists to supposedly prevent the tearing down of the underlying live page table, the time window covered by that precaution isn't large enough.
総合評価: CVE-2023-34322 は低リスク（36.1/100）。CVSS 深刻度は高。悪用される可能性が高い（EPSS 0.23%、14 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 | 0.06% | 0.23% | +0.17% |
| 2 | 2025-11-21 | 0.04% | 0.06% | +0.01% |
| 3 | 2025-11-18 | — | 0.04% | — |
EPSS の全履歴 （全 11 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 |
|---|---|---|---|---|---|---|
| 7.8 | 3.1 | HIGH |
|
1.8 | 5.9 | [email protected] |
| 7.8 | 3.1 | HIGH |
|
1.8 | 5.9 | 134c704f-9b21-4f2e-91b3-4a467353bcc0 |
| vendor | priority | summary | link |
|---|---|---|---|
alpine
|
— | CVE-2023-34322: 1 source package rows (xen); 194 state rows across 7 repos (3.17-main, 3.18-main, 3.19-main, 3.20-main, 3.21-main, 3.22-main, edge-main); fixed 7, open 187. | https://security.alpinelinux.org/vuln/CVE-2023-34322 |
debian
|
end-of-life | CVE-2023-34322 end-of-life priority: Debian including 1 source packages (xen), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 4, open 1. | https://security-tracker.debian.org/tracker/CVE-2023-34322 |
gentoo
|
normal | CVE-2023-34322: 1 GLSA(s) (202409-10), 1 atom(s) (app-emulation/xen); latest impact normal. | https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2023-34322 |
suse
|
high | — | https://www.suse.com/security/cve/CVE-2023-34322/ |
ubuntu
|
medium | CVE-2023-34322 medium priority: Ubuntu including 1 source packages (xen), 12 status rows across 12 suites (bionic, focal, jammy, lunar, mantic, noble, oracular, plucky, questing, trusty, upstream, xenial): needs-triage 7, ignored 5. | https://ubuntu.com/security/CVE-2023-34322 |
| URL | タグ |
|---|---|
| https://xenbits.xenproject.org/xsa/advisory-438.html | Vendor Advisory |
| http://xenbits.xen.org/xsa/advisory-438.html |