CVE-2026-49416Disclosure(freebsd / freebsd)

LOWCVSS 7.8 · HIGH

Signal is active with 4 mentions in latest observed window

Immediate actions

Track advisory updates for patch or workaround availability

Recommended action window: Monitor and triage in normal cycle

NVD description

The CONS_HISTORY ioctl handler did not adequately validate the requested history size. A large value caused an integer overflow in the buffer size calculation, resulting in a heap allocation smaller than expected. Subsequent initialization of the buffer wrote beyond the end of the allocation. An unprivileged local user with access to a vt(4) device can trigger an out-of-bounds write in the kernel, potentially escalating privileges.

freebsd CVEs Back to dashboard

0.0/ 10 priority

Sources & remediation

Vendor / third-party advisories

https://security.freebsd.org/advisories/FreeBSD-SA-26:34.vt.asc

Weakness type (CWE)

CWE-190

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

NONE

Momentum

NONE

Are you affected?

If you run products in this scope, you should treat this CVE as relevant to your environment.

freebsd

Threat summary

4 mentions across 1 observed day

What's happening

Technical details provided in 3 signals
Disclosure: 3 classified signals
General: 1 classified signal
4 total mentions across 1 day

Affected systems

Vendors

freebsd

Products

freebsd

3 versions affected across 1 product

Deep dive

Activity timeline4 mentions / 1d

Signal classification2 categories

Disclosure

375.0%

General

125.0%

Referenced assets5 URLs

By indicator

Full discourse4 posts

Vulmon Vulnerability Feed@VulmonFeeds91d
Disclosure
CVE-2026-49416 Integer Overflow in CONS_HISTORY ioctl Handler Causing Kernel Hea... https://vulmon.com/vulnerabilitydetails?qid=CVE-2026-49416 Vulnerability Alert Subscriptions: https://alerts.vulmon.com/?utm_source=twitter&utm_medium=social&utm_campaign=2102281&utm_content=1
Post summary
The tweet announces CVE‑2026‑49416 as an integer overflow in the CONS_HISTORY ioctl handler, with no PoC, exploit code, active exploitation, or patch information provided.
00010109
4.1K followersView on X
VulDB 🛡@vuldb90d
Disclosure
A new vulnerability with increased severity was disclosed for FreeBSD (CVE-2026-49416) https://vuldb.com/vuln/374477
Post summary
The post announces the new disclosure of CVE-2026-49416 for FreeBSD, noting increased severity, but provides no further details on exploitation, patching, or technical specifics.
00000160
2.2K followersView on X
Infoflowcloud@infoflowcloud91d
Disclosure
🚨*CVE* CVE-2026-49416 The CONS_HISTORY ioctl handler did not adequately validate the requested history size. A large value caused an integer overflow in the buffer size calculation, resul… https://www.cve.org/CVERecord?id=CVE-2026-49416 ----- Traducción: CVE-2026-49416 El … http://infoflow.cloud`
Post summary
The tweet announces CVE-2026-49416, describing an integer overflow in the CONS_HISTORY ioctl handler, but offers no PoC, exploit, active exploitation evidence, or patch information.
0000034
89 followersView on X
CVE@CVEnew91d
General
CVE-2026-49416 The CONS_HISTORY ioctl handler did not adequately validate the requested history size. A large value caused an integer overflow in the buffer size calculation, resul… https://www.cve.org/CVERecord?id=CVE-2026-49416
Post summary
The snippet describes an integer overflow vulnerability in the CONS_HISTORY ioctl due to insufficient validation of the history size, but it does not mention exploitation, a PoC, patches, or active use.
000001.0K
57.7K followersView on X

CPE platform detail31 entries

Part:

Vendor:

Product:

Version:

Target SW:

Target HW:

31 of 31 entries

Part	Vendor	Product	Version	Target SW	Target HW
OS	freebsd	freebsd	14.3	-	-
OS	freebsd	freebsd	14.3	-	-
OS	freebsd	freebsd	14.3	-	-
OS	freebsd	freebsd	14.3	-	-
OS	freebsd	freebsd	14.3	-	-
OS	freebsd	freebsd	14.3	-	-
OS	freebsd	freebsd	14.3	-	-
OS	freebsd	freebsd	14.3	-	-
OS	freebsd	freebsd	14.3	-	-
OS	freebsd	freebsd	14.3	-	-
OS	freebsd	freebsd	14.3	-	-
OS	freebsd	freebsd	14.3	-	-
OS	freebsd	freebsd	14.3	-	-
OS	freebsd	freebsd	14.3	-	-
OS	freebsd	freebsd	14.3	-	-
OS	freebsd	freebsd	14.4	-	-
OS	freebsd	freebsd	14.4	-	-
OS	freebsd	freebsd	14.4	-	-
OS	freebsd	freebsd	14.4	-	-
OS	freebsd	freebsd	14.4	-	-
OS	freebsd	freebsd	14.4	-	-
OS	freebsd	freebsd	15.0	-	-
OS	freebsd	freebsd	15.0	-	-
OS	freebsd	freebsd	15.0	-	-
OS	freebsd	freebsd	15.0	-	-
OS	freebsd	freebsd	15.0	-	-
OS	freebsd	freebsd	15.0	-	-
OS	freebsd	freebsd	15.0	-	-
OS	freebsd	freebsd	15.0	-	-
OS	freebsd	freebsd	15.0	-	-
OS	freebsd	freebsd	15.0	-	-

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What researchers are saying

CVE-2026-49416

Vulmon Vulnerability Feed@VulmonFeedsDisclosure

The tweet announces CVE‑2026‑49416 as an integer overflow in the CONS_HISTORY ioctl handler, with no PoC, exploit code, active exploitation, or patch information provided.

VulDB 🛡@vuldbDisclosure

The post announces the new disclosure of CVE-2026-49416 for FreeBSD, noting increased severity, but provides no further details on exploitation, patching, or technical specifics.

Infoflowcloud@infoflowcloudDisclosure

The tweet announces CVE-2026-49416, describing an integer overflow in the CONS_HISTORY ioctl handler, but offers no PoC, exploit, active exploitation evidence, or patch information.

CVE@CVEnewGeneral

The snippet describes an integer overflow vulnerability in the CONS_HISTORY ioctl due to insufficient validation of the history size, but it does not mention exploitation, a PoC, patches, or active use.