CVE-2026-3038 (GCVE-0-2026-3038)

Vulnerability from cvelistv5 – Published: 2026-03-09 12:25 – Updated: 2026-03-09 16:03
VLAI?
Title
Local DoS and possible privilege escalation via routing sockets
Summary
The rtsock_msg_buffer() function serializes routing information into a buffer. As a part of this, it copies sockaddr structures into a sockaddr_storage structure on the stack. It assumes that the source sockaddr length field had already been validated, but this is not necessarily the case, and it's possible for a malicious userspace program to craft a request which triggers a 127-byte overflow. In practice, this overflow immediately overwrites the canary for the rtsock_msg_buffer() stack frame, resulting in a panic once the function returns. The bug allows an unprivileged user to crash the kernel by triggering a stack buffer overflow in rtsock_msg_buffer(). In particular, the overflow will corrupt a stack canary value that is verified when the function returns; this mitigates the impact of the stack overflow by triggering a kernel panic. Other kernel bugs may exist which allow userspace to find the canary value and thus defeat the mitigation, at which point local privilege escalation may be possible.
Severity ?
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE
Assigner
References
Impacted products
Vendor Product Version
FreeBSD FreeBSD Affected: 15.0-RELEASE , < p4 (release)
Affected: 14.3-RELEASE , < p9 (release)
Affected: 13.5-RELEASE , < p10 (release)
Affected: 14.4-RC1 (beta)
Create a notification for this product.
Date Public ?
2026-02-24 17:00
Credits
Adam Crosser of the Praetorian Labs team
Show details on NVD website
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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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