CVSS 5.5 · Medium EPSS 0,16%
Kerentanan NULL Pointer Dereference pada linux kernel, debian linux. Skor CVSS 3.1 5.5 (Medium) menurut NVD.
In the Linux kernel, the following vulnerability has been resolved: wifi: zd1211rw: Fix potential NULL pointer dereference in zd_mac_tx_to_dev() There is a potential NULL pointer dereference in zd_mac_tx_to_dev(). For example, the following is possible: T0 T1 zd_mac_tx_to_dev() /* len == skb_queue_len(q) */ while (len > ZD_MAC_MAX_ACK_WAITERS) { filter_ack() spin_lock_irqsave(&q->lock, flags); /* position == skb_queue_len(q) */ for (i=1; i<position; i++) skb = __skb_dequeue(q) if (mac->type == NL80211_IFTYPE_AP) skb = __skb_dequeue(q); spin_unlock_irqrestore(&q->lock, flags); skb_dequeue() -> NULL Since there is a small gap between checking skb queue length and skb being unconditionally dequeued in zd_mac_tx_to_dev(), skb_dequeue() can return NULL. Then the pointer is passed to zd_mac_tx_status() where it is dereferenced. In order to avoid potential NULL pointer dereference due to situations like above, check if skb is not NULL before passing it to zd_mac_tx_status(). Found by Linux Verification Center (linuxtesting.org) with SVACE.
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
· uraikan di kalkulator | Vendor | Produk | Versi terdampak |
|---|---|---|
| linux | linux kernel | Versi 2.6.25 hingga sebelum 5.4.296 |
| linux | linux kernel | Versi 5.5 hingga sebelum 5.10.240 |
| linux | linux kernel | Versi 5.11 hingga sebelum 5.15.189 |
| linux | linux kernel | Versi 5.16 hingga sebelum 6.1.146 |
| linux | linux kernel | Versi 6.2 hingga sebelum 6.6.99 |
| linux | linux kernel | Versi 6.7 hingga sebelum 6.12.39 |
| linux | linux kernel | Versi 6.13 hingga sebelum 6.15.7 |
| linux | linux kernel | Versi 6.16 rc1 |
| linux | linux kernel | Versi 6.16 rc2 |
| linux | linux kernel | Versi 6.16 rc3 |
| linux | linux kernel | Versi 6.16 rc4 |
| linux | linux kernel | Versi 6.16 rc5 |
| debian | debian linux | Versi 11.0 |