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CVE-2026-58097— ppp(8): missing length validation in mp_SetEnddisc()

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.

mp_SetEnddisc() 函数在未进行长度验证的情况下复制了用户提供的 PSN（PPP Stream Number）端点值，从而导致通过 ppp(8) 命令接口发生缓冲区溢出。 拥有 ppp(8) 命令接口访问权限的本地用户可导致 ppp(8) 崩溃，并可能以 root 权限执行任意代码。

AI Predicted 7.8 Difficulty: Moderate EPSS 0.27% · P19

Possible ATT&CK Techniques 1 AI

T1203 · Exploitation for Client Execution

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-2026-58097

Vulnerability Information
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Vulnerability Title
ppp(8): missing length validation in mp_SetEnddisc()
Source: CVE Program / CVE List V5
Vulnerability Description
mp_SetEnddisc() copied a user-supplied PSN endpoint value without length validation, allowing a buffer overflow via the ppp(8) command interface. A local user with access to the ppp(8) command interface 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
长度参数不一致性处理不恰当
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-2026-58097

# POC Description Source Link Shenlong Link
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III. Intelligence Information for CVE-2026-58097

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Vendor Advisories for CVE-2026-58097 (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-2026-58095 ppp(8): incorrect length calculation in mp_Enddisc()
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-130

V. Comments for CVE-2026-58097

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