In the Linux kernel, the following vulnerability has been resolved: powerpc/memhotplug: Add add_pages override for PPC With commit ffa0b64e3be5 ("powerpc: Fix virt_addr_valid() for 64-bit Book3E & 32-bit") the kernel now validate the addr against high_memory value. This results in the below BUG_ON with dax pfns. [ 635.798741][T26531] kernel BUG at mm/page_alloc.c:5521! 1:mon> e cpu 0x1: Vector: 700 (Program Check) at [c000000007287630] pc: c00000000055ed48: free_pages.part.0+0x48/0x110 lr: c00000000053ca70: tlb_finish_mmu+0x80/0xd0 sp: c0000000072878d0 msr: 800000000282b033 current = 0xc00000000afabe00 paca = 0xc00000037ffff300 irqmask: 0x03 irq_happened: 0x05 pid = 26531, comm = 50-landscape-sy kernel BUG at :5521! Linux version 5.19.0-rc3-14659-g4ec05be7c2e1 (kvaneesh@ltc-boston8) (gcc (Ubuntu 9.4.0-1ubuntu1~20.04.1) 9.4.0, GNU ld (GNU Binutils for Ubuntu) 2.34) #625 SMP Thu Jun 23 00:35:43 CDT 2022 1:mon> t [link register ] c00000000053ca70 tlb_finish_mmu+0x80/0xd0 [c0000000072878d0] c00000000053ca54 tlb_finish_mmu+0x64/0xd0 (unreliable) [c000000007287900] c000000000539424 exit_mmap+0xe4/0x2a0 [c0000000072879e0] c00000000019fc1c mmput+0xcc/0x210 [c000000007287a20] c000000000629230 begin_new_exec+0x5e0/0xf40 [c000000007287ae0] c00000000070b3cc load_elf_binary+0x3ac/0x1e00 [c000000007287c10] c000000000627af0 bprm_execve+0x3b0/0xaf0 [c000000007287cd0] c000000000628414 do_execveat_common.isra.0+0x1e4/0x310 [c000000007287d80] c00000000062858c sys_execve+0x4c/0x60 [c000000007287db0] c00000000002c1b0 system_call_exception+0x160/0x2c0 [c000000007287e10] c00000000000c53c system_call_common+0xec/0x250 The fix is to make sure we update high_memory on memory hotplug. This is similar to what x86 does in commit 3072e413e305 ("mm/memory_hotplug: introduce add_pages")
総合評価: CVE-2022-49666 は低リスク（27.1/100）。CVSS 深刻度は中。悪用される可能性が高い（EPSS 0.24%、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 | 0.14% | 0.24% | +0.09% |
| 2 | 2026-04-06 | 0.04% | 0.14% | +0.10% |
| 3 | 2025-02-27 | — | 0.04% | — |
EPSS の全履歴 （全 3 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 |
|---|---|---|---|---|---|---|
| 5.5 | 3.1 | MEDIUM |
|
1.8 | 3.6 | [email protected] |
| vendor | priority | summary | link |
|---|---|---|---|
debian
|
not yet assigned | CVE-2022-49666 not yet assigned priority: Debian including 1 source packages (linux), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 4, open 1. | https://security-tracker.debian.org/tracker/CVE-2022-49666 |
redhat
|
medium | — | https://access.redhat.com/security/cve/CVE-2022-49666 |
suse
|
medium | CVE-2022-49666 severity moderate: SUSE including 53 source package names (bpftool-7.0.0-284.11.1.el9_2, cluster-md-kmp-default, …), 272 product×package rows across 47 product lines (SLES-LTSS-TERADATA 15 SP2, SUSE Liberty Linux 9, … (47 product lines)): Known Not Affected 245, Fixed 27. | https://www.suse.com/security/cve/CVE-2022-49666/ |
ubuntu
|
medium | CVE-2022-49666 medium priority: Ubuntu including 158 source packages (linux, linux-allwinner-5.19, …), 1551 status rows across 10 suites (bionic, focal, jammy, noble, oracular, plucky, questing, trusty, upstream, xenial): DNE 1145, ignored 146, not-affected 123, released 114, needed 22, needs-triage 1. | https://ubuntu.com/security/CVE-2022-49666 |
| ベンダー | 製品 | バージョン | 生の CPE |
|---|---|---|---|
| linux | linux_kernel | >= 5.4.190, < 5.5 | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
| linux | linux_kernel | >= 5.10.111, < 5.11 | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
| linux | linux_kernel | >= 5.15.34, < 5.15.53 | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
| linux | linux_kernel | >= 5.16.20, < 5.17 | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
| linux | linux_kernel | >= 5.17.3, < 5.18 | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
| linux | linux_kernel | >= 5.18.1, < 5.18.10 | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
| linux | linux_kernel | 5.18 | cpe:2.3:o:linux:linux_kernel:5.18:-:*:*:*:*:*:* |
| linux | linux_kernel | 5.18 | cpe:2.3:o:linux:linux_kernel:5.18:rc2:*:*:*:*:*:* |
| linux | linux_kernel | 5.18 | cpe:2.3:o:linux:linux_kernel:5.18:rc3:*:*:*:*:*:* |
| linux | linux_kernel | 5.18 | cpe:2.3:o:linux:linux_kernel:5.18:rc4:*:*:*:*:*:* |
| linux | linux_kernel | 5.18 | cpe:2.3:o:linux:linux_kernel:5.18:rc5:*:*:*:*:*:* |
| linux | linux_kernel | 5.18 | cpe:2.3:o:linux:linux_kernel:5.18:rc6:*:*:*:*:*:* |
| linux | linux_kernel | 5.18 | cpe:2.3:o:linux:linux_kernel:5.18:rc7:*:*:*:*:*:* |
| linux | linux_kernel | 5.19 | cpe:2.3:o:linux:linux_kernel:5.19:rc1:*:*:*:*:*:* |
| linux | linux_kernel | 5.19 | cpe:2.3:o:linux:linux_kernel:5.19:rc2:*:*:*:*:*:* |
| linux | linux_kernel | 5.19 | cpe:2.3:o:linux:linux_kernel:5.19:rc3:*:*:*:*:*:* |
| linux | linux_kernel | 5.19 | cpe:2.3:o:linux:linux_kernel:5.19:rc4:*:*:*:*:*:* |