CVE-2026-49428: FreeBSD · Mass Assignment
Affects FreeBSDSource GCVE Database
Not known to be exploited · CVSS 8.4 High.
Data as of 9 Nov 2026, 23:24 UTC
Thin evidence
One scorer or none| CISA-ADP | CVSS 3.1 | 8.4 |
|---|
- 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:HExploitation evidence
Disclosed: evidence found.
CVE published 19 Aug 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: 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 9 Nov 2026.
What to do
Affected software
| Product | Affected | Fixed in |
|---|---|---|
Freebsdfreebsd/freebsdpkg:deb/freebsd/freebsdOther threats | Affected
| 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.