Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: wifi: mt76: Fix memory leak after mt76_connac_mcu_alloc_sta_req() mt76_connac_mcu_alloc_sta_req() allocates an skb which is expected to be freed eventually by mt76_mcu_skb_send_msg(). However, currently if an intermediate function fails before sending, the allocated skb is leaked. Specifically, mt76_connac_mcu_sta_wed_update() and mt76_connac_mcu_sta_key_tlv() may fail, leading to an immediate memory leak in the error path. Fix this by explicitly freeing the skb in these error paths. Commit 7c0f63fe37a5 ("wifi: mt76: mt7996: fix memory leak on mt7996_mcu_sta_key_tlv error") made a similar change. Compile tested only. Issue found using a prototype static analysis tool and code review.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 6683d988089ce0e80bd859a9493333b6b272420e before a2af91af9536922edc3f63de90c3f1fe9db71717; affected 6683d988089ce0e80bd859a9493333b6b272420e before 7de35b99503012e57bec027e98ed53f881518b5b; affected 6683d988089ce0e80bd859a9493333b6b272420e before 8527ac1bce87aaabde6755e8e6eb2a9f439d1292; affected 6683d988089ce0e80bd859a9493333b6b272420e before eb466406d2094deefadc2cd6ddb4f6eeb086d1b4; affected 6683d988089ce0e80bd859a9493333b6b272420e before c41075ce8cf05ed8c0e7b7efef000dce548ffc42 |
| Linux / Linux | affected 5.18; unaffected 0 before 5.18; unaffected 6.6.160 through 6.6.*; unaffected 6.12.109 through 6.12.*; unaffected 6.18.50 through 6.18.*; unaffected 7.0.10 through 7.0.*; unaffected 7.1 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/a2af91af9536922edc3f63de90c3f1fe9db71717
- https://git.kernel.org/stable/c/7de35b99503012e57bec027e98ed53f881518b5b
- https://git.kernel.org/stable/c/8527ac1bce87aaabde6755e8e6eb2a9f439d1292
- https://git.kernel.org/stable/c/eb466406d2094deefadc2cd6ddb4f6eeb086d1b4
- https://git.kernel.org/stable/c/c41075ce8cf05ed8c0e7b7efef000dce548ffc42