CVE-2026-16526— Pcp: pcp: privilege escalation to root via linux_sockets pmda vulnerability
Quick assessment
Affected
Red Hat Red Hat Enterprise Linux 10
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
pcp是pcp组织开源的一个系统性能分析工具包。 pcp存在资源管理错误漏洞，该漏洞源于PCP linux_sockets模块暴露了不安全的内部连接，可能导致具有初始代码执行权限的攻击者提升权限并执行任意命令。
Possible ATT&CK Techniques 1 AI
T1068 · Exploitation for Privilege EscalationAffected Version Matrix 10
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Red Hat | Red Hat Enterprise Linux 10 | 0:7.0.3-5.el10_2< * |
unaffected |
| Red Hat | Red Hat Enterprise Linux 10.0 Extended Update Support | 0:6.3.7-1.el10_0.1< * |
unaffected |
| Red Hat | Red Hat Enterprise Linux 6 | any |
unknown |
| Red Hat | Red Hat Enterprise Linux 7 | any |
affected |
| Red Hat | Red Hat Enterprise Linux 8 | 0:5.3.7-22.el8_10.5< * |
unaffected |
| Red Hat | Red Hat Enterprise Linux 9 | 0:6.3.7-8.el9_8.4< * |
unaffected |
| Red Hat | Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions | 0:6.0.1-8.el9_2.2< * |
unaffected |
| Red Hat | Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions | 0:6.2.0-5.el9_4.2< * |
unaffected |
| Red Hat | Red Hat Enterprise Linux 9.6 Extended Update Support | 0:6.3.7-1.el9_6.1< * |
unaffected |
| Red Hat | Red Hat OpenShift Container Platform 4 | any |
unaffected |
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I. Basic Information for CVE-2026-16526
Vulnerability Information
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Vulnerability Title
Pcp: pcp: privilege escalation to root via linux_sockets pmda vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
A flaw in the PCP linux_sockets module exposes an unsecured internal connection.
An attacker with initial code execution can exploit this to escalate privileges and execute arbitrary commands as root.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
将文件描述符暴露给不受控制的范围(文件描述符泄露)
Source: CVE Program / CVE List V5
Vulnerability Title
pcp 资源管理错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
pcp是pcp组织开源的一个系统性能分析工具包。 pcp存在资源管理错误漏洞，该漏洞源于PCP linux_sockets模块暴露了不安全的内部连接，可能导致具有初始代码执行权限的攻击者提升权限并执行任意命令。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Red Hat | Red Hat Enterprise Linux 10 | 0:7.0.3-5.el10_2 ~ * |
cpe:/o:redhat:enterprise_linux:10.2
|
|
| Red Hat | Red Hat Enterprise Linux 10.0 Extended Update Support | 0:6.3.7-1.el10_0.1 ~ * |
cpe:/o:redhat:enterprise_linux_eus:10.0
|
|
| Red Hat | Red Hat Enterprise Linux 8 | 0:5.3.7-22.el8_10.5 ~ * |
cpe:/a:redhat:enterprise_linux:8::appstream
|
|
| Red Hat | Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support | 0:5.2.5-8.el8_4.1 ~ * |
cpe:/a:redhat:rhel_aus:8.4::appstream
|
|
| Red Hat | Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On | 0:5.2.5-8.el8_4.1 ~ * |
cpe:/a:redhat:rhel_aus:8.4::appstream
|
|
| Red Hat | Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support | 0:5.3.5-10.el8_6.1 ~ * |
cpe:/a:redhat:rhel_aus:8.6::appstream
|
|
| Red Hat | Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On | 0:5.3.5-10.el8_6.1 ~ * |
cpe:/a:redhat:rhel_aus:8.6::appstream
|
|
| Red Hat | Red Hat Enterprise Linux 8.8 Telecommunications Update Service | 0:5.3.7-19.el8_8.1 ~ * |
cpe:/a:redhat:rhel_e4s:8.8::appstream
|
|
| Red Hat | Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions | 0:5.3.7-19.el8_8.1 ~ * |
cpe:/a:redhat:rhel_e4s:8.8::appstream
|
|
| Red Hat | Red Hat Enterprise Linux 9 | 0:6.3.7-8.el9_8.4 ~ * |
cpe:/a:redhat:enterprise_linux:9::appstream
|
|
| Red Hat | Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions | 0:6.0.1-8.el9_2.2 ~ * |
cpe:/a:redhat:rhel_e4s:9.2::appstream
|
|
| Red Hat | Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions | 0:6.2.0-5.el9_4.2 ~ * |
cpe:/a:redhat:rhel_e4s:9.4::appstream
|
|
| Red Hat | Red Hat Enterprise Linux 9.6 Extended Update Support | 0:6.3.7-1.el9_6.1 ~ * |
cpe:/a:redhat:rhel_eus:9.6::appstream
|
|
| 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 OpenShift Container Platform 4 | - |
cpe:/a:redhat:openshift:4
|
|
II. Public POCs for CVE-2026-16526
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
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No public POC found.
Login to generate AI POCIII. Intelligence Information for CVE-2026-16526
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Vendor Advisories for CVE-2026-16526 (10)
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🔗 2506026 – (CVE-2026-16526) CVE-2026-16526 PCP: PCP: Privilege escalation to root via linux_sockets PMDA vulnerability Read full article issue-tracking x_refsource_REDHAT
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🔗 RHSA-2026:55560 - Security Advisory - Red Hat Customer Portal Read full article vendor-advisory x_refsource_REDHAT
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Other References for CVE-2026-16526 (2)
Same Patch Batch · Red Hat · 2026-07-30 · 15 CVEs total
| CVE-2026-58222 | 8.8 HIGH | Samba: samba ad ldap compare filter injection and trusted-request confusion disclose prote |
| CVE-2026-16524 | 7.8 HIGH | Pcp: pcp linux_sockets pmda: arbitrary command execution via command injection |
| CVE-2026-18381 | 7.6 HIGH | Project-koku/koku-metrics-operator: koku-metrics-operator: operator service-account token |
| CVE-2026-18378 | 7.6 HIGH | Project-koku/koku-metrics-operator: koku-metrics-operator: cluster pull-secret token exfil |
| CVE-2026-16529 | 7.5 HIGH | Pcp: pcp: denial of service due to signed integer overflow |
| CVE-2026-16527 | 7.3 HIGH | Pcp: pcp pmproxy: unauthenticated access to /store endpoint allows bypassing pmcd access r |
| CVE-2026-18382 | 6.8 MEDIUM | Project-koku/koku-metrics-operator: koku-metrics-operator: service-account client credenti |
| CVE-2026-16530 | 6.5 MEDIUM | Pcp: pcp: remote denial of service and information leakage |
| CVE-2026-68562 | 6.2 MEDIUM | Ansible-collection-redhat-leapp: ansible-collection-redhat-leapp: information disclosure v |
| CVE-2026-18369 | 5.8 MEDIUM | Dogtag-pki: pki-core: redhat-pki: pki: acme http-01 validation ssrf via ip literal identif |
| CVE-2026-68563 | 5.5 MEDIUM | Ansible-collection-redhat-leapp: ansible-collection-redhat-leapp: information disclosure o |
| CVE-2026-16531 | 5.3 MEDIUM | Pcp: pcp: arbitrary file creation via path traversal in pmproxy logger servlet |
| CVE-2026-58218 | 5.3 MEDIUM | Samba: dns signing dos via tkey name cache exhaustion |
| CVE-2026-58216 | 5.3 MEDIUM | Samba: kpasswd service: kpasswd packet that contains malformed asn.1 might cause the serve |
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