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CVE-2026-58095— ppp(8): incorrect length calculation in mp_Enddisc()

Quick assessment

Affected
FreeBSD FreeBSD
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.

在格式化端点鉴别器地址以进行显示时， 使用了不正确的长度计算，导致接收到的端点选项可能溢出全局结果缓冲区。 恶意 PPP 对等方可能导致 ppp(8) 崩溃，或潜在地以 root 权限执行任意代码。

AI Predicted 9.8 Difficulty: Easy EPSS 0.29% · P21

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 3

VendorProduct Version RangeStatus
FreeBSD FreeBSD 15.1-RELEASE< p3 affected
15.0-RELEASE< p13 affected
14.4-RELEASE< p9 affected
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I. Basic Information for CVE-2026-58095

Vulnerability Information
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Vulnerability Title
ppp(8): incorrect length calculation in mp_Enddisc()
Source: CVE Program / CVE List V5
Vulnerability Description
mp_Enddisc() used incorrect length calculations when formatting endpoint discriminator addresses for display, allowing a received endpoint option to overflow a global result buffer. A malicious PPP peer can crash ppp(8) or potentially execute arbitrary code as root.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
堆缓冲区溢出
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
FreeBSD FreeBSD 15.1-RELEASE ~ p3 -

II. Public POCs for CVE-2026-58095

# POC Description Source Link Shenlong Link
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III. Intelligence Information for CVE-2026-58095

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Vendor Advisories for CVE-2026-58095 (1)

Same Patch Batch · FreeBSD · 2026-08-26 · 9 CVEs total

CVE-2026-58090 Use-after-free in unix SOCK_STREAM message handling
CVE-2026-58091 Kernel use-after-free via the SNDCTL_DSP_SYNCSTART ioctl
CVE-2026-58092 Unauthorized credential switching
CVE-2026-58089 hwpmc fails to detach PMCs during exec credential transitions
CVE-2026-58097 ppp(8): missing length validation in mp_SetEnddisc()
CVE-2026-58093 Kernel use-after-free via tty ioctls
CVE-2026-58096 ppp(8): missing length validation in LcpDecodeConfig()
CVE-2026-58094 TOCTOU race in POSIX shared memory large page configuration

IV. Related Vulnerabilities

Same product: FreeBSD
Same vendor: FreeBSD
Same weakness: CWE-122

V. Comments for CVE-2026-58095

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