The physdev_get_free_pirq hypercall in arch/x86/physdev.c in Xen 4.1.x and Citrix XenServer 6.0.2 and earlier uses the return value of the get_free_pirq function as an array index without checking that the return value indicates an error, which allows guest OS users to cause a denial of service (invalid memory write and host crash) and possibly gain privileges via unspecified vectors.
結論預警: CVE-2012-3495 綜合評估為低風險(36.9/100):CVSS 技術影響為中級,利用機率偏低(EPSS 0.44%) 強制指令: 持續追蹤利用情報與 EPSS 變化,並適時複評優先級。
風險隨態勢動態變化;本站持續評估並同步更新本頁展示內容。
EPSS 日更估計相對被利用可能性;百分位表示該 CVE 在已評分漏洞中的相對排名(越高表示相對更嚴重)。
| # | 日期 | 舊 EPSS 分數 | 新 EPSS 分數 | 變化(新 − 舊) |
|---|---|---|---|---|
| 1 | 2026-06-15 | 0.06% | 0.44% | +0.38% |
| 2 | 2023-03-07 | 1.55% | 0.06% | -1.48% |
| 3 | 2022-02-04 | — | 1.55% | — |
完整 EPSS 歷史 (共 3 筆)
該 CVE 的 CVSS 指標。
| 底座分 | 版本 | 嚴重度 | 向量 | 可利用性 | 影響 | 分數來源 |
|---|---|---|---|---|---|---|
| 6.1 | 2.0 | MEDIUM |
|
3.9 | 8.5 | [email protected] |
| vendor | priority | summary | link |
|---|---|---|---|
debian
|
not yet assigned | CVE-2012-3495 not yet assigned priority: Debian including 1 source packages (xen), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. | https://security-tracker.debian.org/tracker/CVE-2012-3495 |
gentoo
|
normal | CVE-2012-3495: 2 GLSA(s) (201309-24, 201604-03), 4 atom(s) (app-emulation/pvgrub, app-emulation/xen, app-emulation/xen-pvgrub, app-emulation/xen-tools); latest impact normal. | https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2012-3495 |
redhat
|
medium | — | https://access.redhat.com/security/cve/CVE-2012-3495 |
ubuntu
|
medium | CVE-2012-3495 medium priority: Ubuntu including 4 source packages (xen, xen-3.1, xen-3.2, xen-3.3), 28 status rows across 7 suites (hardy, lucid, natty, oneiric, precise, quantal, upstream): DNE 17, not-affected 5, needs-triage 3, released 3. | https://ubuntu.com/security/CVE-2012-3495 |
| 廠商 | 產品 | 版本 | 原始 CPE |
|---|---|---|---|
| citrix | xenserver | <= 6.0.2 | cpe:2.3:a:citrix:xenserver:*:*:*:*:*:*:*:* |
| citrix | xenserver | 5.0 | cpe:2.3:a:citrix:xenserver:5.0:*:*:*:*:*:*:* |
| citrix | xenserver | 5.5 | cpe:2.3:a:citrix:xenserver:5.5:*:*:*:*:*:*:* |
| citrix | xenserver | 5.6 | cpe:2.3:a:citrix:xenserver:5.6:*:*:*:*:*:*:* |
| citrix | xenserver | 5.6 | cpe:2.3:a:citrix:xenserver:5.6:fp1:*:*:*:*:*:* |
| citrix | xenserver | 5.6 | cpe:2.3:a:citrix:xenserver:5.6:sp2:*:*:*:*:*:* |
| citrix | xenserver | 6.0 | cpe:2.3:a:citrix:xenserver:6.0:*:*:*:*:*:*:* |
| xen | xen | 4.1.0 | cpe:2.3:o:xen:xen:4.1.0:*:*:*:*:*:*:* |
| xen | xen | 4.1.1 | cpe:2.3:o:xen:xen:4.1.1:*:*:*:*:*:*:* |
| xen | xen | 4.1.2 | cpe:2.3:o:xen:xen:4.1.2:*:*:*:*:*:*:* |
| xen | xen | 4.1.3 | cpe:2.3:o:xen:xen:4.1.3:*:*:*:*:*:*:* |