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CVE PROGRAM SOURCE RECORDUnscored

CVE-2026-100076

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

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Status
Published
Published
Updated
Assigning organization
Linux

Description

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().

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Linux Linux

Default version status: unaffected

  • 554c0a3abf216c991c5ebddcdb2c08689ecd290b to < 973a629f19c226c8f6080badea7ccf59cc04233faffected
  • 554c0a3abf216c991c5ebddcdb2c08689ecd290b to < 17260b5215d4ced17a733e2c027a76290e476fadaffected
  • 554c0a3abf216c991c5ebddcdb2c08689ecd290b to < 2f5e2752c2b4bad01df4523cfe2b41b702c60f00affected
  • 554c0a3abf216c991c5ebddcdb2c08689ecd290b to < 6c9f6a3b9fdd31a0836b681053155b5997c0156eaffected
  • 554c0a3abf216c991c5ebddcdb2c08689ecd290b to < c48e5aa01525577d6b6e782962a5bfb0e1535cb5affected
  • 554c0a3abf216c991c5ebddcdb2c08689ecd290b to < 41b8209376dffbd7b0b85c8bc4697d9166ac62efaffected

Linux Linux

Default version status: affected

  • 4.12affected
  • 0 to < 4.12unaffected
  • 6.1.191 to ≤ 6.1.*unaffected
  • 6.6.160 to ≤ 6.6.*unaffected
  • 6.12.114 to ≤ 6.12.*unaffected
  • 6.18.52 to ≤ 6.18.*unaffected
  • 7.2.6 to ≤ 7.2.*unaffected
  • 7.3 to ≤ *unaffected

References