GHSA-r9jv-8h68-mr7c · 深刻度： high — In the Linux kernel, the following vulnerability has been resolved: efi: Fix reservation of...
In the Linux kernel, the following vulnerability has been resolved: efi: Fix reservation of unaccepted memory table The reserve_unaccepted() function incorrectly calculates the size of the memblock reservation for the unaccepted memory table. It aligns the size of the table, but fails to account for cases where the table's starting physical address (efi.unaccepted) is not page-aligned. If the table starts at an offset within a page and its end crosses into a subsequent page that the aligned size does not cover, the end of the table will not be reserved. This can lead to the table being overwritten or inaccessible, causing a kernel panic in accept_memory(). This issue was observed when starting Intel TDX VMs with specific memory sizes (e.g., > 64GB). Fix this by calculating the end address first (including the unaligned start) and then aligning it up, ensuring the entire range is covered by the reservation.
総合評価: CVE-2026-45851 は低リスク（32.4/100）。CVSS 深刻度は高。悪用される可能性が高い（EPSS 0.21%、11 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 | 0.02% | 0.21% | +0.19% |
| 2 | 2026-05-28 | — | 0.02% | — |
EPSS の全履歴 （全 2 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 |
|---|---|---|---|---|---|---|
| 7.1 | 3.1 | HIGH |
|
1.8 | 5.2 | [email protected] |
GHSA-r9jv-8h68-mr7c · 深刻度： high — In the Linux kernel, the following vulnerability has been resolved: efi: Fix reservation of...
| vendor | priority | summary | link |
|---|---|---|---|
debian
|
unimportant | CVE-2026-45851 unimportant 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-2026-45851 |
redhat
|
low | — | https://access.redhat.com/security/cve/CVE-2026-45851 |
ubuntu
|
medium | CVE-2026-45851 medium priority: Ubuntu including 158 source packages (linux, linux-allwinner-5.19, …), 1422 status rows across 9 suites (bionic, focal, jammy, noble, questing, resolute, trusty, upstream, xenial): DNE 1024, ignored 169, not-affected 89, released 84, needed 37, pending 18, needs-triage 1. | https://ubuntu.com/security/CVE-2026-45851 |
| ベンダー | 製品 | バージョン | 生の CPE |
|---|---|---|---|
| linux | linux_kernel | >= 6.6.1, < 6.6.128 | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
| linux | linux_kernel | >= 6.7, < 6.12.75 | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
| linux | linux_kernel | >= 6.13, < 6.18.14 | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
| linux | linux_kernel | >= 6.19, < 6.19.4 | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
| linux | linux_kernel | 6.6 | cpe:2.3:o:linux:linux_kernel:6.6:-:*:*:*:*:*:* |
| linux | linux_kernel | 6.6 | cpe:2.3:o:linux:linux_kernel:6.6:rc3:*:*:*:*:*:* |
| linux | linux_kernel | 6.6 | cpe:2.3:o:linux:linux_kernel:6.6:rc4:*:*:*:*:*:* |
| linux | linux_kernel | 6.6 | cpe:2.3:o:linux:linux_kernel:6.6:rc5:*:*:*:*:*:* |
| linux | linux_kernel | 6.6 | cpe:2.3:o:linux:linux_kernel:6.6:rc6:*:*:*:*:*:* |
| linux | linux_kernel | 6.6 | cpe:2.3:o:linux:linux_kernel:6.6:rc7:*:*:*:*:*:* |