Description (CNA)
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.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 79dc4b508e3f2649390a1f745f7657813e5938ec; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before a2f9fa31ae021ef1fdcaf3ab17bd49f9223dd6a4; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before b589a965184dde49c43b8caf5bcc65715a7b4ef2; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before c7881b6088276601beaccb7440b8d56eab0d65ae; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before b2fc9955ddc7c4ca03be44b995193bd6486c62e1; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 61a7ff4a62003b55a15022567486741b3bd83914; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 21a537606fe35be2b85971a5fd35c0023b6ef98f; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 660667cd406648bbaffbd5c0d897c2263a852f11 |
| Linux / Linux | affected 2.6.12; unaffected 0 before 2.6.12; unaffected 5.10.261 through 5.10.*; unaffected 5.15.212 through 5.15.*; unaffected 6.1.178 through 6.1.*; unaffected 6.6.145 through 6.6.*; unaffected 6.12.97 through 6.12.*; unaffected 6.18.40 through 6.18.*; unaffected 7.1.5 through 7.1.*; unaffected 7.2 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/79dc4b508e3f2649390a1f745f7657813e5938ec
- https://git.kernel.org/stable/c/a2f9fa31ae021ef1fdcaf3ab17bd49f9223dd6a4
- https://git.kernel.org/stable/c/b589a965184dde49c43b8caf5bcc65715a7b4ef2
- https://git.kernel.org/stable/c/c7881b6088276601beaccb7440b8d56eab0d65ae
- https://git.kernel.org/stable/c/b2fc9955ddc7c4ca03be44b995193bd6486c62e1
- https://git.kernel.org/stable/c/61a7ff4a62003b55a15022567486741b3bd83914
- https://git.kernel.org/stable/c/21a537606fe35be2b85971a5fd35c0023b6ef98f
- https://git.kernel.org/stable/c/660667cd406648bbaffbd5c0d897c2263a852f11