# CVE-2026-100076: linux: In the Linux kernel, the following vulnerability has been resolved:  staging: rtl8723bs: fix xmit_frame/xmit_buf leak...

CVE-2026-100076 is fixed in linux on 1 platform, first by DEBIAN-CVE-2026-100076, released September 25, 2026. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2026-100076
- Priority: Routine
- CVSS: 5.5 (medium)
- EPSS: 0.0016
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Sep 25, 2026

## 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().

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 13.5 (trixie) | 6.12.115-2 | [DEBIAN-CVE-2026-100076](https://patchblox.com/security/data/fix/linux/debian-cve-2026-100076.md) | Sep 25, 2026 |
| Linux | linux Debian 14 | 7.2.6-1 | [DEBIAN-CVE-2026-100076](https://patchblox.com/security/data/fix/linux/debian-cve-2026-100076.md) | Sep 25, 2026 |

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Data as of 2026-11-09T01:18:40Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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