In the flush_tmregs_to_thread function in arch/powerpc/kernel/ptrace.c in the Linux kernel before 4.13.5, a guest kernel crash can be triggered from unprivileged userspace during a core dump on a POWER host due to a missing processor feature check and an erroneous use of transactional memory (TM) instructions in the core dump path, leading to a denial of service.
総合評価: CVE-2018-1091 は低リスク（33.9/100）。CVSS 深刻度は中。悪用される可能性が高い（EPSS 0.42%、33 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 | 0.08% | 0.42% | +0.34% |
| 2 | 2025-03-30 | 0.35% | 0.08% | -0.27% |
| 3 | 2025-03-29 | — | 0.35% | — |
EPSS の全履歴 （全 7 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 | 3.0 | MEDIUM |
|
1.8 | 3.6 | [email protected] |
| 4.9 | 2.0 | MEDIUM |
|
3.9 | 6.9 | [email protected] |
| vendor | priority | summary | link |
|---|---|---|---|
debian
|
not yet assigned | CVE-2018-1091 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-2018-1091 |
redhat
|
medium | — | https://access.redhat.com/security/cve/CVE-2018-1091 |
suse
|
low | CVE-2018-1091 severity low: SUSE including 123 source package names (cluster-md-kmp-default-4.12.14-120.1, cluster-md-kmp-default-4.4.121-92.109.2, …), 423 product×package rows across 92 product lines (SLES for SAP Applications 11 SP3, SUSE CaaS Platform 4.0, … (92 product lines)): Known Not Affected 227, Fixed 196. | https://www.suse.com/security/cve/CVE-2018-1091/ |
ubuntu
|
medium | CVE-2018-1091 medium priority: Ubuntu including 23 source packages (linux, linux-aws, …), 92 status rows across 4 suites (artful, trusty, upstream, xenial): DNE 51, released 25, not-affected 16. | https://ubuntu.com/security/CVE-2018-1091 |
| ベンダー | 製品 | バージョン | 生の CPE |
|---|---|---|---|
| linux | linux_kernel | <= 4.13.4 | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
| URL | タグ |
|---|---|
| http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=c1fa0768a8713b135848f78fd43ffc208d8ded70 | Patch Vendor Advisory |
| http://openwall.com/lists/oss-security/2018/03/27/4 | Mailing List Third Party Advisory |
| https://access.redhat.com/errata/RHSA-2018:1318 | |
| https://access.redhat.com/security/cve/cve-2018-1091 | Third Party Advisory |
| https://bugzilla.redhat.com/show_bug.cgi?id=1558149 | Issue Tracking Third Party Advisory |
| https://github.com/torvalds/linux/commit/c1fa0768a8713b135848f78fd43ffc208d8ded70 | Patch Third Party Advisory |
| https://marc.info/?l=linuxppc-embedded&m=150535531910494&w=2 | Patch Third Party Advisory |
| https://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.13.5 | Patch Vendor Advisory |