CVE-2026-45253

Missing validation in ptrace(PT_SC_REMOTE)

HIGH

8.4

CVSS Score

Published: May 21, 2026 at 09:17 AM UTC

Updated: July 23, 2026 at 07:32 PM UTC

1 product affected across 1 vendorFreeBSD

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Severity

HIGH8.4

Exploit prediction

EPSS 0.2%

SSVC

No known exploit

Description

ptrace(PT_SC_REMOTE) failed to properly validate parameters for the syscall(2) and __syscall(2) meta-system calls. As a result, a user with the ability to debug a process may trigger arbitrary code execution in the kernel, even if the target process has no special privileges. The missing validation allows an unprivileged local user to escalate privileges, potentially gaining full control of the affected system.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

FreeBSD · Freebsd

95%

14.3-RELEASE ≤ v < p1414.4-RELEASE ≤ v < p515.0-RELEASE ≤ v < p914.3 14.3 p1 14.3 p10 14.3 p11 14.3 p12 14.3 p13 14.3 p2 14.3 p3 14.3 p4 14.3 p5 14.3 p6 14.3 p7 14.3 p8 14.3 p9 14.3-RELEASE 14.4 14.4 p1 14.4 p2 14.4 p3 14.4 p414.4 rc114.4-RELEASE 15.0 15.0 p1 15.0 p2 15.0 p3 15.0 p4 15.0 p5 15.0 p6 15.0 p7 15.0 p8 15.0-RELEASE

Affected range stops below p14, so it looks safe — our inference, not a vendor statement

Affected range stops below p5, so it looks safe — our inference, not a vendor statement

Affected range stops below p9, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

https://security.freebsd.org/advisories/FreeBSD-SA-26:21.ptrace.asc

References (1)

Vendor Advisory

Source: cverecord

https://security.freebsd.org/advisories/FreeBSD-SA-26:21.ptrace.asc

SSVC — Action Prioritization

SSVCNo known exploitNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

8.4HIGHCISA-ADP

Attack Vector: LOCAL
Complexity: LOW
Privileges: NONE
User Interaction: NONE
Scope: UNCHANGED
Confidentiality: HIGH
Integrity: HIGH
Availability: HIGH

Vector?

Quick Info

StatusANALYZED

CWE

CWE-787

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