CVE-2026-64556— Linux kernel 安全漏洞
可能的 ATT&CK 技术 1AI
T1068 · Exploitation for Privilege Escalation影响版本矩阵 12
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| Linux | Linux | 2e498d0a74e5b88a6689ae1b811f247f91ff188e< 4cdb1b3ab96eb1b7eb70bc5c82fede334bd60df2 | affected |
2e498d0a74e5b88a6689ae1b811f247f91ff188e< 39358e856fb89e62e3c8d7389a2dc4ec33dbe90e | affected | ||
2e498d0a74e5b88a6689ae1b811f247f91ff188e< a2d5d3ee7b6e3953114726b1521e62123ab5b043 | affected | ||
2e498d0a74e5b88a6689ae1b811f247f91ff188e< 06ccef0434e98058ddae7bcebc901f93d22b7653 | affected | ||
2e498d0a74e5b88a6689ae1b811f247f91ff188e< 037a3c43edfb597665dd34457cd22b14692f2ba3 | affected | ||
5.13 | affected | ||
< 5.13 | unaffected | ||
6.6.145≤ 6.6.* | unaffected | ||
| … +4 条更多 | |||
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一、 漏洞 CVE-2026-64556 基础信息
漏洞信息
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Vulnerability Title
perf/core: Detach event groups during remove_on_exec
来源: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: perf/core: Detach event groups during remove_on_exec perf_event_remove_on_exec() removes events by calling perf_event_exit_event(). For top-level events, this removes the event from the context with DETACH_EXIT only. This can leave inconsistent group state when a removed event is a group leader and the group contains siblings without remove_on_exec. If the group was active, the surviving siblings can remain active and attached to the removed leader's sibling list, but are no longer represented by a valid group leader on the PMU context active lists. A later close of the removed leader uses DETACH_GROUP and can promote the still-active siblings from this stale group state. The next schedule-in can then add an already-linked active_list entry again, corrupting the PMU context active list. With DEBUG_LIST enabled, this is caught as a list_add double-add in merge_sched_in(). Fix this by detaching group relationships when remove_on_exec removes an event. This preserves the existing task-exit and revoke behavior, while ensuring surviving siblings are ungrouped before the removed event leaves the context.
来源: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
来源: CVE Program / CVE List V5
Vulnerability Type
N/A
来源: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 安全漏洞
来源: 中国国家信息安全漏洞库 CNNVD
Vulnerability Description
Linux kernel是美国Linux基金会开源的一款操作系统内核。 Linux kernel 5.13版本存在安全漏洞，该漏洞源于perf/core组件在remove_on_exec时未正确分离事件组，导致PMU上下文活动列表损坏。
来源: 中国国家信息安全漏洞库 CNNVD
CVSS Information
N/A
来源: 中国国家信息安全漏洞库 CNNVD
Vulnerability Type
N/A
来源: 中国国家信息安全漏洞库 CNNVD
受影响产品
二、漏洞 CVE-2026-64556 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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CVE-2026-64556 补丁与修复 (5)
同批安全公告 · Linux · 2026-07-29 · 共 5 条
| CVE-2026-64557 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-64560 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-64559 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-64558 | 7.8 HIGH | Linux kernel 安全漏洞 |
IV. Related Vulnerabilities
V. Comments for CVE-2026-64556
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