CVE-2026-100076

In the Linux kernel, the following vulnerability has been resolved:

staging: rtl8723bs: fix xmit_frame/xmit_buf leaks on mgnt-frame error paths

issue_beacon(), issue_probersp() and issue_asocrsp() obtain a management

xmit_frame together with its xmit_buf from the driver's fixed-size

management-TX pools via alloc_mgtxmitframe(). On the normal path the frame

is handed to dump_mgntframe(), which transfers ownership and eventually

returns both objects to their pools (the frame and, for beacons, the buf

in rtl8723bs_mgnt_xmit(); other bufs via the pending-xmitbuf/TX-completion

path).

Several error/edge paths return early after a successful

alloc_mgtxmitframe() but before dump_mgntframe(), so ownership is never

transferred and neither object is freed:

- issue_beacon(): beacon larger than 512 bytes

- issue_probersp(): cur_network->ie_length > MAX_IE_SZ

- issue_probersp(): kzalloc() of the SSID scratch buffer fails

- issue_asocrsp(): pkt_type is neither ASSOCRSP nor REASSOCRSP

Because alloc_mgtxmitframe() removes the frame and buf from their free

lists (list_del_init) without placing them on any pending list, an

orphaned pair is on no list and referenced by nobody, so it is only

reclaimed at driver teardown. Repeated hits progressively exhaust the

management-TX pools until alloc_mgtxmitframe() returns NULL and the

interface can no longer send beacons or probe/assoc responses.

Free the frame and buffer on these paths, matching the existing correct

error handling in issue_assocreq().