CVE-2026-4878— libcap 安全漏洞
一分钟漏洞结论
影响对象
Red Hat Red Hat Enterprise Linux 10
利用判断
尚无明确在野利用证据，仍需结合暴露面评估
建议动作
优先检查厂商安全公告和参考链接中的修复版本；无法立即升级时，限制受影响服务暴露并加强监测。
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。
影响版本矩阵 53
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| Red Hat | Cert Manager support for Red Hat OpenShift release 1.20 | 1790598593< * |
unaffected |
| Red Hat | Cost Management 4 | 1780946239< * |
unaffected |
1783539156< * |
unaffected | ||
| Red Hat | Red Hat AI Inference Server 3.2 | 1780681984< * |
unaffected |
| Red Hat | Red Hat AI Inference Server 3.3 | 1782352950< * |
unaffected |
1782352919< * |
unaffected | ||
1782353093< * |
unaffected | ||
1782352847< * |
unaffected | ||
| Red Hat | Red Hat Discovery 2 | 1778101579< * |
unaffected |
1778156756< * |
unaffected | ||
1782159791< * |
unaffected | ||
1782166952< * |
unaffected | ||
| Red Hat | Red Hat Enterprise Linux 10 | 0:2.69-7.el10_1.1< * |
unaffected |
0:2.69-7.el10_2.1< * |
unaffected | ||
| Red Hat | Red Hat Enterprise Linux 10.0 Extended Update Support | 0:2.69-7.el10_0.1< * |
unaffected |
| Red Hat | Red Hat Enterprise Linux 6 | 全部 |
unknown |
全部 |
unknown | ||
| Red Hat | Red Hat Enterprise Linux 7 | 全部 |
unknown |
全部 |
unknown | ||
| Red Hat | Red Hat Enterprise Linux 8 | 0:2.48-6.el8_10.1< * |
unaffected |
| Red Hat | Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support | 0:2.48-4.el8_6.1< * |
unaffected |
| Red Hat | Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On | 0:2.48-4.el8_6.1< * |
unaffected |
| Red Hat | Red Hat Enterprise Linux 8.8 Telecommunications Update Service | 0:2.48-5.el8_8.1< * |
unaffected |
| Red Hat | Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions | 0:2.48-5.el8_8.1< * |
unaffected |
| Red Hat | Red Hat Enterprise Linux 9 | 0:2.48-10.el9_7.1< * |
unaffected |
0:2.48-10.el9_8.1< * |
unaffected | ||
0:2.48-10.el9_7.1< * |
unaffected | ||
0:2.48-10.el9_8.1< * |
unaffected | ||
| Red Hat | Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions | 0:2.48-9.el9_2.1< * |
unaffected |
| Red Hat | Red Hat Enterprise Linux 9.4 Extended Update Support | 0:2.48-9.el9_4.1< * |
unaffected |
| Red Hat | Red Hat Enterprise Linux 9.6 Extended Update Support | 0:2.48-9.el9_6.1< * |
unaffected |
| Red Hat | Red Hat Hardened Images | 2.78-1.1.hum1< * |
unaffected |
| Red Hat | Red Hat Insights proxy 1.5 | 1780420428< * |
unaffected |
| Red Hat | Red Hat OpenShift Container Platform 4 | 全部 |
unknown |
全部 |
affected | ||
| Red Hat | Red Hat OpenShift Container Platform 4.12 | 412.86.202608241157-0< * |
unaffected |
| Red Hat | Red Hat OpenShift Container Platform 4.13 | 413.92.202606160406-0< * |
unaffected |
| Red Hat | Red Hat OpenShift Container Platform 4.14 | 414.92.202606231112-0< * |
unaffected |
| Red Hat | Red Hat OpenShift Container Platform 4.15 | 415.92.202606030318-0< * |
unaffected |
| Red Hat | Red Hat OpenShift Container Platform 4.16 | 416.94.202606051757-0< * |
unaffected |
| Red Hat | Red Hat OpenShift Container Platform 4.17 | 417.94.202606250942-0< * |
unaffected |
| Red Hat | Red Hat OpenShift Container Platform 4.18 | 418.94.202606051320-0< * |
unaffected |
| Red Hat | Red Hat OpenShift Container Platform 4.19 | 4.19.9.6.202606031700-0< * |
unaffected |
| Red Hat | Red Hat OpenShift distributed tracing 3.9.3 | 1778056267< * |
unaffected |
1778056233< * |
unaffected | ||
1778056245< * |
unaffected | ||
| Red Hat | Red Hat Update Infrastructure 5 | 1779798159< * |
unaffected |
1779798164< * |
unaffected | ||
1779798165< * |
unaffected | ||
1779798222< * |
unaffected | ||
1787241211< * |
unaffected | ||
1787135742< * |
unaffected | ||
1787241260< * |
unaffected |
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一、 漏洞 CVE-2026-4878 基础信息
漏洞信息
对漏洞内容有疑问？看看神龙的深度分析是否有帮助！
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Vulnerability Title
Libcap: libcap: privilege escalation via toctou race condition in cap_set_file()
来源: CVE Program / CVE List V5
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: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H
来源: CVE Program / CVE List V5
Vulnerability Type
检查时间与使用时间(TOCTOU)的竞争条件
来源: CVE Program / CVE List V5
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 4.12 | 412.86.202608241157-0 ~ * |
cpe:/a:redhat:openshift:4.12::el8
|
|
| Red Hat | Red Hat OpenShift Container Platform 4.13 | 413.92.202606160406-0 ~ * |
cpe:/a:redhat:openshift:4.13::el9
|
|
| Red Hat | Red Hat OpenShift Container Platform 4.14 | 414.92.202606231112-0 ~ * |
cpe:/a:redhat:openshift:4.14::el9
|
|
| 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 4.16 | 416.94.202606051757-0 ~ * |
cpe:/a:redhat:openshift:4.16::el9
|
|
| Red Hat | Red Hat OpenShift Container Platform 4.17 | 417.94.202606250942-0 ~ * |
cpe:/a:redhat:openshift:4.17::el9
|
|
| Red Hat | Red Hat OpenShift Container Platform 4.18 | 418.94.202606051320-0 ~ * |
cpe:/a:redhat:openshift:4.18::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 | Cert Manager support for Red Hat OpenShift release 1.20 | 1790598593 ~ * |
cpe:/a:redhat:cert_manager:1.20::el9
|
|
| Red Hat | Cost Management 4 | 1780946239 ~ * |
cpe:/a:redhat:cost_management:4::el9
|
|
| Red Hat | Cost Management 4 | 1783539156 ~ * |
cpe:/a:redhat:cost_management:4::el9
|
|
| Red Hat | Red Hat AI Inference Server 3.2 | 1780681984 ~ * |
cpe:/a:redhat:ai_inference_server:3.2::el9
|
|
| Red Hat | Red Hat AI Inference Server 3.3 | 1782352950 ~ * |
cpe:/a:redhat:ai_inference_server:3.3::el9
|
|
| Red Hat | Red Hat AI Inference Server 3.3 | 1782352919 ~ * |
cpe:/a:redhat:ai_inference_server:3.3::el9
|
|
| Red Hat | Red Hat AI Inference Server 3.3 | 1782353093 ~ * |
cpe:/a:redhat:ai_inference_server:3.3::el9
|
|
二、漏洞 CVE-2026-4878 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
AI 生成 POC
高级
未找到公开 POC。
登录以生成 AI POC三、漏洞 CVE-2026-4878 的情报信息
请登录查看更多情报信息。
CVE-2026-4878 厂商安全公告 (26)
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🔗 RHSA-2026:14162 - Security Advisory - Red Hat Customer Portal 查看完整文章 vendor-advisory x_refsource_REDHAT
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🔗 RHSA-2026:34098 - Security Advisory - Red Hat Customer Portal 查看完整文章 vendor-advisory x_refsource_REDHAT
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🔗 RHSA-2026:20595 - Security Advisory - Red Hat Customer Portal 查看完整文章 vendor-advisory x_refsource_REDHAT
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🔗 RHSA-2026:19456 - Security Advisory - Red Hat Customer Portal 查看完整文章 vendor-advisory x_refsource_REDHAT
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🔗 RHSA-2026:28887 - Security Advisory - Red Hat Customer Portal 查看完整文章 vendor-advisory x_refsource_REDHAT
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🔗 RHSA-2026:30087 - Security Advisory - Red Hat Customer Portal 查看完整文章 vendor-advisory x_refsource_REDHAT
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🔗 RHSA-2026:13285 - Security Advisory - Red Hat Customer Portal 查看完整文章 vendor-advisory x_refsource_REDHAT
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🔗 RHSA-2026:14937 - Security Advisory - Red Hat Customer Portal 查看完整文章 vendor-advisory x_refsource_REDHAT
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🔗 RHSA-2026:27998 - Security Advisory - Red Hat Customer Portal 查看完整文章 vendor-advisory x_refsource_REDHAT
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CVE-2026-4878 其他参考 (7)
IV. Related Vulnerabilities
V. Comments for CVE-2026-4878
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