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CVE-2026-72022

UnknownEPSS 0.21%

Last modified

CVE-2026-72022 is a vulnerability of currently unknown severity. 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.. EPSS estimates a 0.21% chance of exploitation in the next 30 days.

Description

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.

Metrics

EPSS Probability
0.21%

11.6th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
LinuxLinux>= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 79dc4b508e3f2649390a1f745f7657813e5938ec; >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < a2f9fa31ae021ef1fdcaf3ab17bd49f9223dd6a4; >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < b589a965184dde49c43b8caf5bcc65715a7b4ef2; >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < c7881b6088276601beaccb7440b8d56eab0d65ae; >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < b2fc9955ddc7c4ca03be44b995193bd6486c62e1; >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 61a7ff4a62003b55a15022567486741b3bd83914; >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 21a537606fe35be2b85971a5fd35c0023b6ef98f; >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 660667cd406648bbaffbd5c0d897c2263a852f11
LinuxLinux2.6.12

References

Timeline

Published
Last Modified
Status
Received

Frequently Asked Questions

What is CVE-2026-72022?
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.
How severe is CVE-2026-72022?
Severity scoring for CVE-2026-72022 is pending analysis. The EPSS model estimates a 0.21% probability of exploitation in the next 30 days.
How do I fix CVE-2026-72022?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST