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NVD / CVE Program· CNA Linux

CVE-2026-72450: xfrm: validate selector family and prefixlen during match

HighCVSS 7.8 · v3.1—No exploit Fix available

Noroxi assessment

Priority: Monitor (action score 31/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.16% (FIRST EPSS).
  • Someone with local access to the system can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: Linux Linux 4.20, 40f0b1047918539f0b0f795ac65e35336b4c2c78, 5.10.261.

Low priority for now. Upgrade to Linux Linux 4.20, 40f0b1047918539f0b0f795ac65e35336b4c2c78, 5.10.261 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

In the Linux kernel, the following vulnerability has been resolved: xfrm: validate selector family and prefixlen during match syzbot reported a shift-out-of-bounds in xfrm_selector_match() due to AF_UNSPEC selector with large prefixlen (e.g. 128) matched against IPv4 flow (when XFRM_STATE_AF_UNSPEC is set). Fix this by: - Rejecting mismatched families in xfrm_selector_match. - Returning false in addr4_match if prefixlen > 32. - Returning false in addr_match if prefixlen > 128 (prevents overflow).

Published
Aug 15, 2026
Updated
Oct 16, 2026
EPSS
0.1% · 6th percentile
CWE
—

Report tools

JSON

Action score

31

Monitor

Low priority for now.

CVSS
31 / 40 · 7.8 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.1%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
total

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · Linux
7.8
NVD has not scored this yet; the score shown is the CNA’s.

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2026-72450

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

—

Versions reported by the vendor

Affected version ranges reported by the assigning authority (Linux). Independent of NVD's CPE analysis and usually ahead of it.

  • Linux Linux

    • f31398570acf0f0804c644006f7bfa9067106b0a, 401ad99a5ae7180dd9449eac104cb755f442e7f3, e68dd80ba498265d2266b12dc3459164f4ff0c4a, 6.12affected
    • 8df5cd51fd70c33aa1776e5cbcd82b0a86649d73 and later · before 87a5bbccc7ff4edb3f42fea387124237d2ba91eeaffected · git
    • 2d08a6c31c65f23db71a5385ee9cf9d8f9a67a71 and later · before bd7f202cf77556cff59f68dc30e4cdf40cb6e33baffected · git
    • bce1afaa212ec380bf971614f70909a27882b862 and later · before a3968ad4195d72c8fddcc6c0ef39da95ac98711aaffected · git
    • 7d9868180bd1e4cf37e7c5067362658971162366 and later · before efa9e3b9f3dea2e1ea4c7edf4edc863faef85986affected · git
    • 3f0ab59e6537c6a8f9e1b355b48f9c05a76e8563 and later · before 78783fefdc8f36879b1a17efa0d3195ea5f2dc5faffected · git
    • 3f0ab59e6537c6a8f9e1b355b48f9c05a76e8563 and later · before 6d99379c58f7f1c6ab2cc7aba01a4f52d71adcfeaffected · git
    • 3f0ab59e6537c6a8f9e1b355b48f9c05a76e8563 and later · before 5a03a2ee17e8259dde631ed84fd8322db06cb2aeaffected · git
    • 3f0ab59e6537c6a8f9e1b355b48f9c05a76e8563 and later · before 40f0b1047918539f0b0f795ac65e35336b4c2c78affected · git
    • 5.10.229 and later · before 5.10.261affected · semver

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.180-16.1.180-1
Debian:13linuxbefore 6.12.100-16.12.100-1
Debian:14linuxbefore 7.1.5-17.1.5-1

Same product

linux: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-74705udp: fix potential use-after-free in tunnel segmentation
    40Plan
  • CVE-2026-74612veth: fix skb length accounting after XDP frag adjustment
    40Plan
  • CVE-2026-74475vxlan: use neigh_ha_snapshot() in route_shortcircuit()
    40Plan

Published before and after this one in the same product

  • ← EarlierCVE-2026-72447Aug 15, 2026 · sctp: hold socket lock when dumping endpoints in sctp_diag
    0Monitor
  • ← EarlierCVE-2026-72449Aug 15, 2026 · drm/amdkfd: fix list_del corruption in kfd_criu_resume_svm
    31Monitor
  • Later →CVE-2026-72452Aug 15, 2026 · drm/i915: clear CRTC color blob pointers after dropping refs
    31Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
Linux Linux4.20Vendor (CNA)
Linux Linux40f0b1047918539f0b0f795ac65e35336b4c2c78Vendor (CNA)
Linux Linux5.10.261Vendor (CNA)
Linux Linux5.15.212Vendor (CNA)
Linux Linux5.5Vendor (CNA)
Linux Linux5a03a2ee17e8259dde631ed84fd8322db06cb2aeVendor (CNA)
Linux Linux6.1.178Vendor (CNA)
Linux Linux6.12Vendor (CNA)
Linux Linux6.6.145Vendor (CNA)
Linux Linux6d99379c58f7f1c6ab2cc7aba01a4f52d71adcfeVendor (CNA)
Linux Linux78783fefdc8f36879b1a17efa0d3195ea5f2dc5fVendor (CNA)
Linux Linux87a5bbccc7ff4edb3f42fea387124237d2ba91eeVendor (CNA)
Linux Linuxa3968ad4195d72c8fddcc6c0ef39da95ac98711aVendor (CNA)
Linux Linuxbd7f202cf77556cff59f68dc30e4cdf40cb6e33bVendor (CNA)
Linux Linuxefa9e3b9f3dea2e1ea4c7edf4edc863faef85986Vendor (CNA)
debian:linux6.1.180-1 · Debian:12Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Not on record for this CVE: patch commit or PR link · researcher credit · variant or chain candidate · public bounty program.

Technical details

Attack conditions

  • Someone with local access to the system can trigger it.
  • A low-privileged account is enough.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
high · data can be read
Integrity
high · data or configuration can be modified
Availability
high · the service can be disrupted
Attack vector
Local
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
High
Availability impact
High

Weakness class (CWE)

—

CVSS vector

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

nvd-secondary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

References

Show all references (7 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records