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CVE Record

CVE-2023-26545: In the Linux kernel before 6.1.13, there is a double free in net/mpls/af_mpls.c upon an allocation failure...

In the Linux kernel before 6.1.13, there is a double free in net/mpls/af_mpls.c upon an allocation failure (for registering the sysctl table under a new location) during the renaming of a device.

MediumCVSS 4.7Not KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

CVE-2023-26545 is a Linux kernel memory-management flaw in MPLS networking code. A low-privileged local user could potentially crash or disrupt the system, but the attack requires local access and high complexity. Public sources do not show active exploitation.

Executive priority

Treat this as a moderate operational stability risk, not an internet-scale emergency. Patch during normal kernel maintenance, faster on multi-user servers or appliances where local privilege boundaries matter.

Technical view

Linux kernels before 6.1.13 contain a double free in net/mpls/af_mpls.c during device rename handling when sysctl table registration fails. The CVSS vector is local, high complexity, low privileges, no user interaction, and high availability impact only. The referenced upstream commit and 6.1.13 changelog identify the fix.

Likely exposure

Exposure is most relevant to Linux systems running kernels before 6.1.13 or downstream vendor kernels without the upstream fix. Debian LTS and NetApp advisories indicate downstream product and distribution tracking, but the bundle does not provide a complete affected-product matrix.

Exploitation context

The source bundle lists KEV as false and provides no cited evidence of active exploitation or public weaponization. The CVSS vector indicates exploitation is local, requires low privileges, and is high complexity, with impact limited to availability.

Researcher notes

Focus review on the MPLS device rename path and allocation-failure handling around sysctl table registration. Evidence supports denial-of-service risk through double free, but the provided sources do not establish confidentiality or integrity impact.

Mitigation direction

  • Upgrade to Linux kernel 6.1.13 or a vendor kernel containing the upstream fix.
  • Apply the relevant Debian LTS linux package updates if using affected Debian LTS kernels.
  • Review NetApp advisory NTAP-20230316-0009 for product-specific remediation status.
  • Track vendor security notices for backported fixes in non-mainline kernels.

Validation and detection

  • Inventory Linux kernel versions and identify systems below 6.1.13.
  • Confirm vendor kernel changelogs include commit fda6c89fe3d9aca073495a664e1d5aea28cd4377 or equivalent backport.
  • Check Debian hosts for the relevant DLA 3403-1 or DLA 3404-1 security updates.
  • Prioritize validation on shared systems where untrusted users have local access.
Prepared
Confidence
high
Sources
7

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

ATT&CK lookup starting points

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cwe · low confidence lookup

CWE-415: Exact CWE lookup

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cve · low confidence lookup

CVE-2023-26545 mapping review

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Vulnerability profileCVE Program record
Severity
Medium
CVSS
4.7 (3.1)
Known Exploited
No
Published

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

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

1CVSS vectors
0Timeline events
0ADP providers
7Source links

CVSS vector scores

1 official score

We collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.

ScoreVersionSeverityVectorExploitImpactSource
4.7CVSS 3.1MediumCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H13.6Primary CVE score

Vulnerability scoring details

Base CVSS 3.1 score

4.7Medium
CVSS 3.1 vector shape for CVE-2023-26545Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

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

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Privileges Required
NoneLowHigh
User Interaction
NoneRequired
Scope
ChangedUnchanged
Confidentiality Impact
HighLowNone
Integrity Impact
HighLowNone
Availability Impact
HighLowNone

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
n/an/an/aListed
Weakness

CWE details

CWE-415

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.

CWE-415 · source CWE mapping

Double Free

Double Free represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.

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