An issue was discovered in the Linux kernel through 5.10.1, as used with Xen through 4.14.x. The Linux kernel PV block backend expects the kernel thread handler to reset ring->xenblkd to NULL when stopped. However, the handler may not have time to run if the frontend quickly toggles between the states connect and disconnect. As a consequence, the block backend may re-use a pointer after it was freed. A misbehaving guest can trigger a dom0 crash by continuously connecting / disconnecting a block frontend. Privilege escalation and information leaks cannot be ruled out. This only affects systems with a Linux blkback.
総合評価: CVE-2020-29569 は中リスク（46/100）。CVSS 深刻度は高。悪用される可能性が高い（EPSS 0.39%、30 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 | 2026-06-15 | 0.19% | 0.39% | +0.19% |
| 2 | 2026-04-20 | 0.12% | 0.19% | +0.07% |
| 3 | 2025-07-16 | — | 0.12% | — |
EPSS の全履歴 （全 14 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 |
|---|---|---|---|---|---|---|
| 8.8 | 3.1 | HIGH |
|
2.0 | 6.0 | [email protected] |
| 7.2 | 2.0 | HIGH |
|
3.9 | 10.0 | [email protected] |
| vendor | priority | summary | link |
|---|---|---|---|
alpine
|
high | CVE-2020-29569: 2 source package rows (linux-lts, xen); 209 state rows across 10 repos (3.10-main, 3.11-main, 3.12-main, 3.17-main, 3.18-main, 3.19-main, 3.20-main, 3.21-main, 3.22-main, edge-main); fixed 194, open 15. | https://security.alpinelinux.org/vuln/CVE-2020-29569 |
debian
|
not yet assigned | CVE-2020-29569 not yet assigned priority: Debian including 1 source packages (linux), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. | https://security-tracker.debian.org/tracker/CVE-2020-29569 |
gentoo
|
high | CVE-2020-29569: 1 GLSA(s) (202107-30), 1 atom(s) (app-emulation/xen); latest impact high. | https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2020-29569 |
suse
|
high | CVE-2020-29569 severity important: SUSE including 617 source package names (amazon/suse-sles-15-sp1-chost-byos-v20210304-hvm-ssd-x86_64, amazon/suse-sles-15-sp1-chost-byos-v20220127-hvm-ssd-x86_64, …), 1215 product×package rows across 117 product lines (HPE Helion OpenStack 8, Image SLES12-SP5-Azure-BYOS, … (117 product lines)): Fixed 1053, Known Affected 130, Known Not Affected 32. | https://www.suse.com/security/cve/CVE-2020-29569/ |
ubuntu
|
low | CVE-2020-29569 low priority: Ubuntu including 169 source packages (linux, linux-allwinner, …), 2181 status rows across 16 suites (bionic, focal, groovy, hirsute, impish, jammy, kinetic, lunar, mantic, noble, oracular, plucky, questing, trusty, upstream, xenial): DNE 1696, not-affected 233, released 213, ignored 39. | https://ubuntu.com/security/CVE-2020-29569 |
| ベンダー | 製品 | バージョン | 生の CPE |
|---|---|---|---|
| xen | xen | <= 4.14.1 | cpe:2.3:o:xen:xen:*:*:*:*:*:*:*:* |
| linux | linux_kernel | >= 4.1.44, < 4.2 | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
| linux | linux_kernel | >= 4.4.80, < 4.4.254 | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
| linux | linux_kernel | >= 4.9.36, < 4.9.249 | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
| linux | linux_kernel | >= 4.11.9, < 4.12 | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
| linux | linux_kernel | >= 4.12, < 4.14.213 | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
| linux | linux_kernel | >= 4.15, < 4.19.164 | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
| linux | linux_kernel | >= 4.20, < 5.4.86 | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
| linux | linux_kernel | >= 5.5, < 5.10.4 | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
| netapp | hci_compute_node_bios | — | cpe:2.3:o:netapp:hci_compute_node_bios:-:*:*:*:*:*:*:* |
| netapp | solidfire_\&_hci_management_node | — | cpe:2.3:a:netapp:solidfire_\&_hci_management_node:-:*:*:*:*:*:*:* |
| netapp | solidfire_\&_hci_storage_node | — | cpe:2.3:a:netapp:solidfire_\&_hci_storage_node:-:*:*:*:*:*:*:* |
| debian | debian_linux | 9.0 | cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* |
| debian | debian_linux | 10.0 | cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* |
| URL | タグ |
|---|---|
| https://lists.debian.org/debian-lts-announce/2021/02/msg00018.html | Mailing List Third Party Advisory |
| https://lists.debian.org/debian-lts-announce/2021/03/msg00010.html | Mailing List Third Party Advisory |
| https://security.gentoo.org/glsa/202107-30 | Third Party Advisory |
| https://security.netapp.com/advisory/ntap-20210205-0001/ | Third Party Advisory |
| https://www.debian.org/security/2021/dsa-4843 | Third Party Advisory |
| https://xenbits.xenproject.org/xsa/advisory-350.html | Patch Vendor Advisory |