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CVE-2026-72022· NVD / CVE Program· CNA Linux

llc: fix SAP refcount leak in llc_ui_autobind()

Noroxi assessment

Priority: Monitor (action score 0/100)

  • 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: 0.22% (FIRST EPSS).
  • Fixed version: Linux Linux 21a537606fe35be2b85971a5fd35c0023b6ef98f, 61a7ff4a62003b55a15022567486741b3bd83914, 660667cd406648bbaffbd5c0d897c2263a852f11.

Low priority for now. Upgrade to Linux Linux 21a537606fe35be2b85971a5fd35c0023b6ef98f, 61a7ff4a62003b55a15022567486741b3bd83914, 660667cd406648bbaffbd5c0d897c2263a852f11 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

In the Linux kernel, the following vulnerability has been resolved: llc: fix SAP refcount leak in llc_ui_autobind() llc_ui_autobind() opens a SAP after choosing a dynamic LSAP. llc_sap_open() returns a reference owned by the caller, and llc_sap_add_socket() takes a second reference for the socket's membership in the SAP hash tables. llc_ui_bind() drops the caller's reference after adding the socket, but llc_ui_autobind() keeps it. When the socket is closed, llc_sap_remove_socket() releases only the socket reference, leaving the SAP on llc_sap_list with sk_count == 0. This is user-visible because repeated autobind and close cycles can consume all dynamic SAP values and make later autobinds fail with -EUSERS. Drop the caller's reference after a successful autobind, matching llc_ui_bind()'s ownership model.

—No exploit Fix available
Published
Aug 15, 2026
Updated
Aug 17, 2026
EPSS
0.2% · 11th percentile
CWE
—

Report tools

JSON

Action score

0

Monitor

Low priority for now.

CVSS
0 / 40 · —
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.2%

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  • A fix has been released

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Noroxi analysis

What does it mean in your environment?

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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

    • 2.6.12affected
    • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before 79dc4b508e3f2649390a1f745f7657813e5938ecaffected · git
    • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before a2f9fa31ae021ef1fdcaf3ab17bd49f9223dd6a4affected · git
    • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before b589a965184dde49c43b8caf5bcc65715a7b4ef2affected · git
    • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before c7881b6088276601beaccb7440b8d56eab0d65aeaffected · git
    • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before b2fc9955ddc7c4ca03be44b995193bd6486c62e1affected · git
    • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before 61a7ff4a62003b55a15022567486741b3bd83914affected · git
    • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before 21a537606fe35be2b85971a5fd35c0023b6ef98faffected · git
    • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before 660667cd406648bbaffbd5c0d897c2263a852f11affected · git
    • before 2.6.12not affected · 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

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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 Linux21a537606fe35be2b85971a5fd35c0023b6ef98fVendor (CNA)
Linux Linux61a7ff4a62003b55a15022567486741b3bd83914Vendor (CNA)
Linux Linux660667cd406648bbaffbd5c0d897c2263a852f11Vendor (CNA)
Linux Linux79dc4b508e3f2649390a1f745f7657813e5938ecVendor (CNA)
Linux Linuxa2f9fa31ae021ef1fdcaf3ab17bd49f9223dd6a4Vendor (CNA)
Linux Linuxb2fc9955ddc7c4ca03be44b995193bd6486c62e1Vendor (CNA)
Linux Linuxb589a965184dde49c43b8caf5bcc65715a7b4ef2Vendor (CNA)
Linux Linuxc7881b6088276601beaccb7440b8d56eab0d65aeVendor (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).

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

No CVSS vector for this record, so attack conditions can't be derived.

Weakness class (CWE)

—

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. Fix✗ → ✓

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References

Show all references (7 more)

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

All records