GHSA-rj9j-qfgp-687w · 深刻度： high — In the Linux kernel, the following vulnerability has been resolved: alpha: fix user-space...
In the Linux kernel, the following vulnerability has been resolved: alpha: fix user-space corruption during memory compaction Alpha systems can suffer sporadic user-space crashes and heap corruption when memory compaction is enabled. Symptoms include SIGSEGV, glibc allocator failures (e.g. "unaligned tcache chunk"), and compiler internal errors. The failures disappear when compaction is disabled or when using global TLB invalidation. The root cause is insufficient TLB shootdown during page migration. Alpha relies on ASN-based MM context rollover for instruction cache coherency, but this alone is not sufficient to prevent stale data or instruction translations from surviving migration. Fix this by introducing a migration-specific helper that combines: - MM context invalidation (ASN rollover), - immediate per-CPU TLB invalidation (TBI), - synchronous cross-CPU shootdown when required. The helper is used only by migration/compaction paths to avoid changing global TLB semantics. Additionally, update flush_tlb_other(), pte_clear(), to use READ_ONCE()/WRITE_ONCE() for correct SMP memory ordering. This fixes observed crashes on both UP and SMP Alpha systems.
総合評価: CVE-2026-43258 は低リスク（32.5/100）。CVSS 深刻度は高。悪用される可能性が高い（EPSS 0.14%、3 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% | 0.14% | +0.12% |
| 2 | 2026-05-07 | — | 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 |
|---|---|---|---|---|---|---|
| 7.8 | 3.1 | HIGH |
|
1.8 | 5.9 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
GHSA-rj9j-qfgp-687w · 深刻度： high — In the Linux kernel, the following vulnerability has been resolved: alpha: fix user-space...
| vendor | priority | summary | link |
|---|---|---|---|
debian
|
not yet assigned | CVE-2026-43258 not yet assigned priority: Debian including 1 source packages (linux), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 3, open 2. | https://security-tracker.debian.org/tracker/CVE-2026-43258 |
redhat
|
— | — | https://access.redhat.com/security/cve/CVE-2026-43258 |
suse
|
— | — | https://www.suse.com/security/cve/CVE-2026-43258/ |
ubuntu
|
medium | CVE-2026-43258 medium priority: Ubuntu including 161 source packages (linux, linux-allwinner-5.19, …), 1449 status rows across 9 suites (bionic, focal, jammy, noble, questing, resolute, trusty, upstream, xenial): DNE 1048, ignored 173, needed 129, released 83, not-affected 10, needs-triage 5, pending 1. | https://ubuntu.com/security/CVE-2026-43258 |
| ベンダー | 製品 | バージョン | 生の CPE |
|---|---|---|---|
| linux | linux_kernel | >= 2.6.16.1, < 6.12.75 | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
| linux | linux_kernel | >= 6.13, < 6.18.16 | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
| linux | linux_kernel | >= 6.19, < 6.19.6 | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
| linux | linux_kernel | 2.6.16 | cpe:2.3:o:linux:linux_kernel:2.6.16:-:*:*:*:*:*:* |
| linux | linux_kernel | 2.6.16 | cpe:2.3:o:linux:linux_kernel:2.6.16:rc2:*:*:*:*:*:* |
| linux | linux_kernel | 2.6.16 | cpe:2.3:o:linux:linux_kernel:2.6.16:rc3:*:*:*:*:*:* |
| linux | linux_kernel | 2.6.16 | cpe:2.3:o:linux:linux_kernel:2.6.16:rc4:*:*:*:*:*:* |
| linux | linux_kernel | 2.6.16 | cpe:2.3:o:linux:linux_kernel:2.6.16:rc5:*:*:*:*:*:* |
| linux | linux_kernel | 2.6.16 | cpe:2.3:o:linux:linux_kernel:2.6.16:rc6:*:*:*:*:*:* |
| linux | linux_kernel | 2.6.16 | cpe:2.3:o:linux:linux_kernel:2.6.16:rc7:*:*:*:*:*:* |