CVE-2026-49424: FreeBSD · Use of Uninitialized Resource
Affects FreeBSDSource GCVE Database
Not known to be exploited · CVSS 5.5 Medium.
Data as of 27 Oct 2026, 14:15 UTC
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:NExploitation evidence
Disclosed: evidence found.
CVE published 19 Aug 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.
What to do
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| FreeBSD FreeBSD | Affected
| Fixed in– |
AI-suggested
Until a fix is available, limit local user access to trusted users only to reduce risk of sensitive information disclosure.
Description
CVE-2026-49424 is a vulnerability in FreeBSD where the Linux waitid() implementation translates a FreeBSD siginfo_t struct into a Linux siginfo_t on the stack without zeroing the stack memory first. This results in an uninitialized resource use, allowing an unprivileged user to potentially observe 104 bytes of kernel stack data that may contain sensitive information.