An issue was discovered in the Linux kernel 5.5 through 5.7.9, as used in Xen through 4.13.x for x86 PV guests. An attacker may be granted the I/O port permissions of an unrelated task. This occurs because tss_invalidate_io_bitmap mishandling causes a loss of synchronization between the I/O bitmaps of TSS and Xen, aka CID-cadfad870154.
総合評価: CVE-2020-15852 は低リスク(39.8/100)。CVSS 深刻度は高。悪用される可能性が高い(EPSS 0.33%、24 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 | 0.16% | 0.33% | +0.16% |
| 2 | 2025-11-21 | 0.09% | 0.16% | +0.07% |
| 3 | 2025-11-18 | — | 0.09% | — |
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 |
|---|---|---|---|---|---|---|
| 7.8 | 3.1 | HIGH |
|
1.8 | 5.9 | [email protected] |
| 4.6 | 2.0 | MEDIUM |
|
3.9 | 6.4 | [email protected] |
| vendor | priority | summary | link |
|---|---|---|---|
debian
|
not yet assigned | CVE-2020-15852 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-2020-15852 |
redhat
|
medium | — | https://access.redhat.com/security/cve/CVE-2020-15852 |
suse
|
high | CVE-2020-15852 severity important: SUSE including 17 source package names (kernel-default, kernel-default-base, …), 286 product×package rows across 45 product lines (HPE Helion OpenStack 8, SUSE CaaS Platform 3.0, … (45 product lines)): Known Not Affected 286. | https://www.suse.com/security/cve/CVE-2020-15852/ |
ubuntu
|
medium | CVE-2020-15852 medium priority: Ubuntu including 41 source packages (linux, linux-aws, …), 246 status rows across 6 suites (bionic, focal, groovy, trusty, upstream, xenial): DNE 136, not-affected 52, released 42, ignored 16. | https://ubuntu.com/security/CVE-2020-15852 |
| ベンダー | 製品 | バージョン | 生の CPE |
|---|---|---|---|
| linux | linux_kernel | >= 5.5, <= 5.7.9 | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
| xen | xen | <= 4.13.1 | cpe:2.3:o:xen:xen:*:*:*:*:*:*:x86:* |
| netapp | cloud_backup | — | cpe:2.3:a:netapp:cloud_backup:-:*:*:*:*:*:*:* |
| netapp | steelstore_cloud_integrated_storage | — | cpe:2.3:a:netapp:steelstore_cloud_integrated_storage:-:*:*:*:*:*:*:* |
| netapp | solidfire_baseboard_management_controller | — | cpe:2.3:h:netapp:solidfire_baseboard_management_controller:-:*:*:*:*:*:*:* |
| URL | タグ |
|---|---|
| http://www.openwall.com/lists/oss-security/2020/07/21/2 | Mailing List Third Party Advisory |
| http://xenbits.xen.org/xsa/advisory-329.html | Patch Third Party Advisory |
| https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=cadfad870154e14f745ec845708bc17d166065f2 | Mailing List Patch Vendor Advisory |
| https://github.com/torvalds/linux/commit/cadfad870154e14f745ec845708bc17d166065f2 | Patch Third Party Advisory |
| https://security.netapp.com/advisory/ntap-20200810-0001/ | Third Party Advisory |