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NVD / CVE Program· CNA Linux

CVE-2026-72242: selinux: avoid sk_socket dereference in selinux_sctp_bind_connect()

Noroxi assessment

Priority: Monitor (action score 30/100)

  • 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: 0.69% (FIRST EPSS); higher than 53.2% of all records.
  • Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
  • According to CISA the attack is automatable: targets can be found by mass scanning.
  • Fixed version: Linux Linux 2fcaf133a8fd88b69f32ebaecad93fd302da828f, 37d642b37ccdc31e1947c2ebc8dc38f03d4a0ceb, 56acfeb10019e200ab6787d01f8d7cbe0f01526f.

Low priority for now. Upgrade to Linux Linux 2fcaf133a8fd88b69f32ebaecad93fd302da828f, 37d642b37ccdc31e1947c2ebc8dc38f03d4a0ceb, 56acfeb10019e200ab6787d01f8d7cbe0f01526f 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: selinux: avoid sk_socket dereference in selinux_sctp_bind_connect() selinux_sctp_bind_connect() dereferences sk->sk_socket to pass a struct socket * to selinux_socket_bind() and selinux_socket_connect_helper(). However, when the hook is invoked from the ASCONF softirq path (sctp_process_asconf), there is no file reference guaranteeing that sk->sk_socket is non-NULL. The setsockopt callers (bindx, connectx, set_primary, sendmsg connect) hold a file reference and are not affected. Both selinux_socket_bind() and selinux_socket_connect_helper() immediately resolve sock->sk, never using the struct socket * for anything else. Refactor the inner logic into helpers that take a struct sock * directly so that selinux_sctp_bind_connect() never needs to touch sk->sk_socket at all.

HighCVSS 7.5 · v3.1—No exploit Fix available
Published
Aug 15, 2026
Updated
Oct 16, 2026
EPSS
0.6% · 53th percentile
CWE
—

Report tools

JSON

Action score

30

Monitor

Low priority for now.

CVSS
30 / 40 · 7.5 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.6%

CISA SSVC decision

Exploitation
none
Automatable
yes
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · Linux
7.5
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

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  • when exploit code appears or is weaponized
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  • 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

    • 4.17affected
    • d452930fd3b9031e59abfeddb2fa383f1403d61a and later · before e4f3b8db1b0c5e9f6374b8996d9e1888d1042b55affected · git
    • d452930fd3b9031e59abfeddb2fa383f1403d61a and later · before 2fcaf133a8fd88b69f32ebaecad93fd302da828faffected · git
    • d452930fd3b9031e59abfeddb2fa383f1403d61a and later · before a4bc2fb8536488b37680c0b66c59434a4b7f8c2faffected · git
    • d452930fd3b9031e59abfeddb2fa383f1403d61a and later · before 5d4d93f9bfbc997ffbb03cd6107e8f6979dbb9b4affected · git
    • d452930fd3b9031e59abfeddb2fa383f1403d61a and later · before cc8bd47b35eca82393cbad08b1cc86f02e034439affected · git
    • d452930fd3b9031e59abfeddb2fa383f1403d61a and later · before d61a80b17254be7230bc5544f8e62ddf21ab38e2affected · git
    • d452930fd3b9031e59abfeddb2fa383f1403d61a and later · before 37d642b37ccdc31e1947c2ebc8dc38f03d4a0cebaffected · git
    • d452930fd3b9031e59abfeddb2fa383f1403d61a and later · before 56acfeb10019e200ab6787d01f8d7cbe0f01526faffected · git
    • before 4.17not affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
AlmaLinux:8kernel-rtbefore 4.18.0-553.178.1.rt7.519.el8_104.18.0-553.178.1.rt7.519.el8_10
AlmaLinux:8kernel-rt-corebefore 4.18.0-553.178.1.rt7.519.el8_104.18.0-553.178.1.rt7.519.el8_10
AlmaLinux:8kernel-rt-debugbefore 4.18.0-553.178.1.rt7.519.el8_104.18.0-553.178.1.rt7.519.el8_10
AlmaLinux:8kernel-rt-debug-corebefore 4.18.0-553.178.1.rt7.519.el8_104.18.0-553.178.1.rt7.519.el8_10
AlmaLinux:8kernel-rt-debug-develbefore 4.18.0-553.178.1.rt7.519.el8_104.18.0-553.178.1.rt7.519.el8_10
AlmaLinux:8kernel-rt-debug-modulesbefore 4.18.0-553.178.1.rt7.519.el8_104.18.0-553.178.1.rt7.519.el8_10
AlmaLinux:8kernel-rt-debug-modules-extrabefore 4.18.0-553.178.1.rt7.519.el8_104.18.0-553.178.1.rt7.519.el8_10
AlmaLinux:8kernel-rt-develbefore 4.18.0-553.178.1.rt7.519.el8_104.18.0-553.178.1.rt7.519.el8_10
AlmaLinux:8kernel-rt-modulesbefore 4.18.0-553.178.1.rt7.519.el8_104.18.0-553.178.1.rt7.519.el8_10
AlmaLinux:8kernel-rt-modules-extrabefore 4.18.0-553.178.1.rt7.519.el8_104.18.0-553.178.1.rt7.519.el8_10
AlmaLinux:9kernelbefore 5.14.0-687.61.1.el9_85.14.0-687.61.1.el9_8
AlmaLinux:9kernel-64kbefore 5.14.0-687.61.1.el9_85.14.0-687.61.1.el9_8
AlmaLinux:9kernel-64k-corebefore 5.14.0-687.61.1.el9_85.14.0-687.61.1.el9_8
AlmaLinux:9kernel-64k-debugbefore 5.14.0-687.61.1.el9_85.14.0-687.61.1.el9_8
AlmaLinux:9kernel-64k-debug-corebefore 5.14.0-687.61.1.el9_85.14.0-687.61.1.el9_8
AlmaLinux:9kernel-64k-debug-develbefore 5.14.0-687.61.1.el9_85.14.0-687.61.1.el9_8
AlmaLinux:9kernel-64k-debug-devel-matchedbefore 5.14.0-687.61.1.el9_85.14.0-687.61.1.el9_8
AlmaLinux:9kernel-64k-debug-modulesbefore 5.14.0-687.61.1.el9_85.14.0-687.61.1.el9_8
AlmaLinux:9kernel-64k-debug-modules-corebefore 5.14.0-687.61.1.el9_85.14.0-687.61.1.el9_8
AlmaLinux:9kernel-64k-debug-modules-extrabefore 5.14.0-687.61.1.el9_85.14.0-687.61.1.el9_8
AlmaLinux:9kernel-64k-develbefore 5.14.0-687.61.1.el9_85.14.0-687.61.1.el9_8
AlmaLinux:9kernel-64k-devel-matchedbefore 5.14.0-687.61.1.el9_85.14.0-687.61.1.el9_8
AlmaLinux:9kernel-64k-modulesbefore 5.14.0-687.61.1.el9_85.14.0-687.61.1.el9_8
AlmaLinux:9kernel-64k-modules-corebefore 5.14.0-687.61.1.el9_85.14.0-687.61.1.el9_8

+66

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-2026-72240Aug 15, 2026 · mfd: sm501: Fix reference leak on failed device registration
    0Monitor
  • ← EarlierCVE-2026-72241Aug 15, 2026 · leds: uleds: Fix potential buffer overread
    0Monitor
  • Later →CVE-2026-72243Aug 15, 2026 · selinux: check connect-related permissions on TCP Fast Open
    33Monitor

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 Linux2fcaf133a8fd88b69f32ebaecad93fd302da828fVendor (CNA)
Linux Linux37d642b37ccdc31e1947c2ebc8dc38f03d4a0cebVendor (CNA)
Linux Linux56acfeb10019e200ab6787d01f8d7cbe0f01526fVendor (CNA)
Linux Linux5d4d93f9bfbc997ffbb03cd6107e8f6979dbb9b4Vendor (CNA)
Linux Linuxa4bc2fb8536488b37680c0b66c59434a4b7f8c2fVendor (CNA)
Linux Linuxcc8bd47b35eca82393cbad08b1cc86f02e034439Vendor (CNA)
Linux Linuxd61a80b17254be7230bc5544f8e62ddf21ab38e2Vendor (CNA)
Linux Linuxe4f3b8db1b0c5e9f6374b8996d9e1888d1042b55Vendor (CNA)
almalinux:kernel5.14.0-687.61.1.el9_8 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k5.14.0-687.61.1.el9_8 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-rt4.18.0-553.178.1.rt7.519.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-rt-core4.18.0-553.178.1.rt7.519.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-rt-debug4.18.0-553.178.1.rt7.519.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-rt-debug-core4.18.0-553.178.1.rt7.519.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-rt-debug-devel4.18.0-553.178.1.rt7.519.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-rt-debug-modules4.18.0-553.178.1.rt7.519.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-rt-debug-modules-extra4.18.0-553.178.1.rt7.519.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-rt-devel4.18.0-553.178.1.rt7.519.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-rt-modules4.18.0-553.178.1.rt7.519.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-rt-modules-extra4.18.0-553.178.1.rt7.519.el8_10 · AlmaLinux:8Package registry (OSV)
debian:linux6.1.187-1 · Debian:12Package registry (OSV)
rocky linux:kernel0:5.14.0-687.61.1.el9_8 · Rocky Linux:9Package registry (OSV)
rocky linux:kernel-rt0:4.18.0-553.178.1.rt7.519.el8_10 · Rocky Linux:8Package 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).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
none
Integrity
none
Availability
high · the service can be disrupted
Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality impact
None
Integrity impact
None
Availability impact
High

Weakness class (CWE)

—

CVSS vector

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

Change log

  1. SSVC exploitation— → none
  2. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (7 more)

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

All records