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VulnerabilityPublished

CVE-2026-49428: FreeBSD · Mass Assignment

Affects FreeBSDSource GCVE Database

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Not known to be exploited · CVSS 8.4 High.

Data as of 9 Nov 2026, 23:24 UTC

CVSS 3.1 base score
8.4High
How severe the flaw is on the 0–10 CVSS scale.

Thin evidence

One scorer or none
CVSS scores by source
CISA-ADPCVSS 3.18.4
EPSS
0.3% chance of exploitation in 30 days – higher than 27% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 19 Aug 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: 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 9 Nov 2026.

What to do

Affected software

ProductAffectedFixed in
Freebsdfreebsd/freebsdpkg:deb/freebsd/freebsdOther threatsAffected
  • 14.3-RELEASE – 15.1-RELEASE
4 affected builds
Fixed in–

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

Until a fix is available, restrict local user access to trusted users only and monitor for any unusual activity related to the affected system calls.

Description

CVE-2026-49428 is a vulnerability in FreeBSD where certain system calls, such as open(2) with the O_TRUNC flag and fspacectl(2), improperly free memory in largepage objects. These operations are not allowed on largepage objects, but the system did not verify this, allowing an unprivileged local user to access freed kernel memory and potentially escalate privileges.

References

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