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VulnerabilityPublished Updated

CVE-2026-49424: FreeBSD · Use of Uninitialized Resource

Affects FreeBSDSource GCVE Database

0

Not known to be exploited · CVSS 5.5 Medium.

Data as of 27 Oct 2026, 14:15 UTC

CVSS 3.1 base score
5.5Medium
How severe the flaw is on the 0–10 CVSS scale.
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 19 Aug 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponised: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq 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

ProductAffectedFixed in
FreeBSD FreeBSDAffected
  • =15.0-RELEASE
  • =14.4-RELEASE
  • =14.3-RELEASE
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.

References

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