CVE-2026-4878— libcap 安全漏洞
影响版本矩阵 33
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一、 漏洞 CVE-2026-4878 基础信息
漏洞信息
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Vulnerability Title
Libcap: libcap: privilege escalation via toctou race condition in cap_set_file()
来源: 美国国家漏洞数据库 NVD
Vulnerability Description
A flaw was found in libcap. A local unprivileged user can exploit a Time-of-check-to-time-of-use (TOCTOU) race condition in the `cap_set_file()` function. This allows an attacker with write access to a parent directory to redirect file capability updates to an attacker-controlled file. By doing so, capabilities can be injected into or stripped from unintended executables, leading to privilege escalation.
来源: 美国国家漏洞数据库 NVD
CVSS Information
CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H
来源: 美国国家漏洞数据库 NVD
Vulnerability Type
检查时间与使用时间(TOCTOU)的竞争条件
来源: 美国国家漏洞数据库 NVD
Vulnerability Title
libcap 安全漏洞
来源: 中国国家信息安全漏洞库 CNNVD
Vulnerability Description
libcap是Michael Kerrisk个人开发者的一个网络数据包捕获函数包。 libcap存在安全漏洞，该漏洞源于cap_set_file函数存在竞争条件，可能导致权限提升。
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
| 厂商 | 产品 | 影响版本 | CPE | 订阅 |
|---|---|---|---|---|
| Red Hat | Red Hat Enterprise Linux 10 | 0:2.69-7.el10_1.1 ~ * | cpe:/o:redhat:enterprise_linux:10.1 | |
| Red Hat | Red Hat Enterprise Linux 10 | 0:2.69-7.el10_2.1 ~ * | cpe:/o:redhat:enterprise_linux:10.2 | |
| Red Hat | Red Hat Enterprise Linux 10.0 Extended Update Support | 0:2.69-7.el10_0.1 ~ * | cpe:/o:redhat:enterprise_linux_eus:10.0 | |
| Red Hat | Red Hat Enterprise Linux 8 | 0:2.48-6.el8_10.1 ~ * | cpe:/o:redhat:enterprise_linux:8::baseos | |
| Red Hat | Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support | 0:2.48-4.el8_6.1 ~ * | cpe:/o:redhat:rhel_aus:8.6::baseos | |
| Red Hat | Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On | 0:2.48-4.el8_6.1 ~ * | cpe:/o:redhat:rhel_aus:8.6::baseos | |
| Red Hat | Red Hat Enterprise Linux 8.8 Telecommunications Update Service | 0:2.48-5.el8_8.1 ~ * | cpe:/o:redhat:rhel_e4s:8.8::baseos | |
| Red Hat | Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions | 0:2.48-5.el8_8.1 ~ * | cpe:/o:redhat:rhel_e4s:8.8::baseos | |
| Red Hat | Red Hat Enterprise Linux 9 | 0:2.48-10.el9_7.1 ~ * | cpe:/a:redhat:enterprise_linux:9::appstream | |
| Red Hat | Red Hat Enterprise Linux 9 | 0:2.48-10.el9_8.1 ~ * | cpe:/a:redhat:enterprise_linux:9::appstream | |
| Red Hat | Red Hat Enterprise Linux 9 | 0:2.48-10.el9_7.1 ~ * | cpe:/a:redhat:enterprise_linux:9::appstream | |
| Red Hat | Red Hat Enterprise Linux 9 | 0:2.48-10.el9_8.1 ~ * | cpe:/a:redhat:enterprise_linux:9::appstream | |
| Red Hat | Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions | 0:2.48-9.el9_2.1 ~ * | cpe:/a:redhat:rhel_e4s:9.2::appstream | |
| Red Hat | Red Hat Enterprise Linux 9.4 Extended Update Support | 0:2.48-9.el9_4.1 ~ * | cpe:/a:redhat:rhel_eus:9.4::appstream | |
| Red Hat | Red Hat Enterprise Linux 9.6 Extended Update Support | 0:2.48-9.el9_6.1 ~ * | cpe:/a:redhat:rhel_eus:9.6::appstream | |
| Red Hat | Red Hat OpenShift Container Platform 4.15 | 415.92.202606030318-0 ~ * | cpe:/a:redhat:openshift:4.15::el9 | |
| Red Hat | Red Hat OpenShift Container Platform 4.19 | 4.19.9.6.202606031700-0 ~ * | cpe:/a:redhat:openshift:4.19::el9 | |
| Red Hat | Red Hat AI Inference Server 3.2 | 1780681984 ~ * | cpe:/a:redhat:ai_inference_server:3.2::el9 | |
| Red Hat | Red Hat Discovery 2 | 1778101579 ~ * | cpe:/a:redhat:discovery:2::el9 | |
| Red Hat | Red Hat Discovery 2 | 1778156756 ~ * | cpe:/a:redhat:discovery:2::el9 | |
| Red Hat | Red Hat Hardened Images | 2.78-1.1.hum1 ~ * | cpe:/a:redhat:hummingbird:1 | |
| Red Hat | Red Hat Insights proxy 1.5 | 1780420428 ~ * | cpe:/a:redhat:insights_proxy:1.5::el9 | |
| Red Hat | Red Hat OpenShift distributed tracing 3.9.3 | 1778056267 ~ * | cpe:/a:redhat:openshift_distributed_tracing:3.9::el9 | |
| Red Hat | Red Hat OpenShift distributed tracing 3.9.3 | 1778056233 ~ * | cpe:/a:redhat:openshift_distributed_tracing:3.9::el9 | |
| Red Hat | Red Hat OpenShift distributed tracing 3.9.3 | 1778056245 ~ * | cpe:/a:redhat:openshift_distributed_tracing:3.9::el9 | |
| Red Hat | Red Hat Update Infrastructure 5 | 1779798159 ~ * | cpe:/a:redhat:rhui:5::el9 | |
| Red Hat | Red Hat Update Infrastructure 5 | 1779798164 ~ * | cpe:/a:redhat:rhui:5::el9 | |
| Red Hat | Red Hat Update Infrastructure 5 | 1779798165 ~ * | cpe:/a:redhat:rhui:5::el9 | |
| Red Hat | Red Hat Update Infrastructure 5 | 1779798222 ~ * | cpe:/a:redhat:rhui:5::el9 | |
| Red Hat | Red Hat Enterprise Linux 6 | - | cpe:/o:redhat:enterprise_linux:6 | |
| Red Hat | Red Hat Enterprise Linux 6 | - | cpe:/o:redhat:enterprise_linux:6 | |
| Red Hat | Red Hat Enterprise Linux 7 | - | cpe:/o:redhat:enterprise_linux:7 | |
| Red Hat | Red Hat Enterprise Linux 7 | - | cpe:/o:redhat:enterprise_linux:7 |
二、漏洞 CVE-2026-4878 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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CVE-2026-4878 厂商安全公告 (16)
- 🔗 RHSA-2026:19456 - Security Advisory - Red Hat Customer Portal 查看完整文章 vendor-advisoryx_refsource_REDHAT
- 🔗 RHSA-2026:20595 - Security Advisory - Red Hat Customer Portal 查看完整文章 vendor-advisoryx_refsource_REDHAT
- 🔗 RHSA-2026:14162 - Security Advisory - Red Hat Customer Portal 查看完整文章 vendor-advisoryx_refsource_REDHAT
- 🔗 RHSA-2026:14937 - Security Advisory - Red Hat Customer Portal 查看完整文章 vendor-advisoryx_refsource_REDHAT
- 🔗 RHSA-2026:13285 - Security Advisory - Red Hat Customer Portal 查看完整文章 vendor-advisoryx_refsource_REDHAT
CVE-2026-4878 其他参考 (2)
IV. Related Vulnerabilities
V. Comments for CVE-2026-4878
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