What is the CVSS score of CVE-2026-31407?

CVE-2026-31407 has a CVSS 3.1 base score of 7.1 (High). CVSS vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H. EPSS exploitation probability: 0.0%.

Is there a patch available for CVE-2026-31407?

Yes, a patch is available for CVE-2026-31407. Update the affected software to the latest version immediately.

Linux CVE-2026-31407

EUVD-2026-19197 HIGH

Out-of-bounds Write (CWE-787)

2026-04-06 Linux

GHSA-cf8w-8g67-48gv

Buffer Overflow Linux Memory Corruption

7.1

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

7.1 HIGH

AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

SUSE

HIGH

qualitative

Red Hat

5.5 MEDIUM

qualitative

Primary rating from NVD.

CVSS VectorNVD

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

High

Lifecycle Timeline

CVSS changed

Apr 27, 2026 - 14:22 NVD

7.1 (HIGH)

Patch available

Apr 16, 2026 - 05:29 EUVD

0fbae1e74493d5a160a70c51aeba035d8266ea7d

EUVD ID Assigned

Apr 06, 2026 - 08:15 euvd

EUVD-2026-19197

CVE Published

Apr 06, 2026 - 07:38 nvd

N/A

DescriptionCVE.org

In the Linux kernel, the following vulnerability has been resolved:

netfilter: conntrack: add missing netlink policy validations

Hyunwoo Kim reports out-of-bounds access in sctp and ctnetlink.

These attributes are used by the kernel without any validation. Extend the netlink policies accordingly.

Quoting the reporter: nlattr_to_sctp() assigns the user-supplied CTA_PROTOINFO_SCTP_STATE value directly to ct->proto.sctp.state without checking that it is within the valid range. [..]

and: ... with exp->dir = 100, the access at ct->master->tuplehash[100] reads 5600 bytes past the start of a 320-byte nf_conn object, causing a slab-out-of-bounds read confirmed by UBSAN.

Analysis

In the Linux kernel, the following vulnerability has been resolved:

netfilter: conntrack: add missing netlink policy validations

Hyunwoo Kim reports out-of-bounds access in sctp and ctnetlink.

These attributes are used by the kernel without any validation. Extend the netlink policies accordingly.

Quoting the reporter: nlattr_to_sctp() assigns the user-supplied CTA_PROTOINFO_SCTP_STATE value directly to ct->proto.sctp.state without checking that it is within the valid range. [..]

and: ... with exp->dir = 100, the access at ct->master->tuplehash[100] reads 5600 bytes past the start of a 320-byte nf_conn object, causing a slab-out-of-bounds read confirmed by UBSAN.

Same weakness CWE-787 – Out-of-bounds Write

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CVE-2009-3129 HIGH POC

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CVE-2021-1732 HIGH POC

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CVE-2013-3346 CRITICAL POC

9.8

Same technique Buffer Overflow

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CVE-2017-7269 CRITICAL POC

9.8

CVE-2015-5119 CRITICAL POC

9.8

CVE-2015-3113 CRITICAL POC

9.8

CVE-2011-2462 CRITICAL POC

9.8

CVE-2009-0927 HIGH POC

8.8

CVE-2012-1889 HIGH POC

8.8

CVE-2017-11882 HIGH POC

7.8

CVE-2010-3333 HIGH POC

7.8

Vendor StatusVendor

SUSE

Severity: High

Product	Status
SUSE Linux Enterprise Desktop 15 SP7	Fixed
SUSE Linux Enterprise Desktop 15 SP7	Fixed
SUSE Linux Enterprise High Availability Extension 15 SP7	Fixed
SUSE Linux Enterprise High Availability Extension 15 SP7	Fixed
SUSE Linux Enterprise High Performance Computing 15 SP7	Fixed

CVE-2026-31407 vulnerability details – vuln.today

Back

Linux CVE-2026-31407

Severity by source

CVSS VectorNVD

Lifecycle Timeline

DescriptionCVE.org

Analysis

Same weakness CWE-787 – Out-of-bounds Write

Same technique Buffer Overflow

Vendor StatusVendor

SUSE

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External POC / Exploit Code