CVE-2022-49326

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2022-49326
In the Linux kernel, the following vulnerability has been resolved: rtl818x: Prevent using not initialized queues Using not existing queues can panic the kernel with rtl8180/rtl8185 cards. Ignore the skb priority for those cards, they only have one tx queue. Pierre Asselin (pa@panix.com) reported the kernel crash in the Gentoo forum: https://forums.gentoo.org/viewtopic-t-1147832-postdays-0-postorder-asc-start-25.html He also confirmed that this patch fixes the issue. In summary this happened: After updating wpa_supplicant from 2.9 to 2.10 the kernel crashed with a "divide error: 0000" when connecting to an AP. Control port tx now tries to use IEEE80211_AC_VO for the priority, which wpa_supplicants starts to use in 2.10. Since only the rtl8187se part of the driver supports QoS, the priority of the skb is set to IEEE80211_AC_BE (2) by mac80211 for rtl8180/rtl8185 cards. rtl8180 is then unconditionally reading out the priority and finally crashes on drivers/net/wireless/realtek/rtl818x/rtl8180/dev.c line 544 without this patch: idx = (ring->idx + skb_queue_len(&ring->queue)) % ring->entries "ring->entries" is zero for rtl8180/rtl8185 cards, tx_ring[2] never got initialized.

5.5 /10

CVSS v3 : MEDIUM

V3 Legend

Vector :

Exploitability : 1.8 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
https://git.kernel.org/stable/c/6ad81ad0cf5744738ce94c8e64051ddd80a1734c Patch
https://git.kernel.org/stable/c/746285cf81dc19502ab238249d75f5990bd2d231 Patch
https://git.kernel.org/stable/c/769ec2a824deae2f1268dfda14999a4d14d0d0c5 Patch
https://git.kernel.org/stable/c/98e55b0b876bde3353f4e074883d66ecb55c65a3 Patch
https://git.kernel.org/stable/c/9ad1981fc4de3afb7db3e8eb5a6a52d4c7d0d577 Patch
https://git.kernel.org/stable/c/9d5e96cc1f1720019ce27b127a31695148d38bb0 Patch
https://git.kernel.org/stable/c/b5dca2cd3f0239512da808598b4e70557eb4c2a1 Patch
https://git.kernel.org/stable/c/b8ce58ab80faaea015c206382041ff3bcf5495ff Patch
https://git.kernel.org/stable/c/d7e30dfc166d33470bba31a42f9bbc346e5409d5 Patch
Configurations

Configuration 1 (hide)

OR cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
History

13 Mar 2025, 21:50

Type Values Removed Values Added
CPE cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
First Time Linux linux Kernel
Linux
CWE CWE-908
Summary
  • (es) En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: rtl818x: Evitar el uso de colas no inicializadas El uso de colas no existentes puede provocar un pánico en el kernel con tarjetas rtl8180/rtl8185. Ignore la prioridad skb para esas tarjetas, solo tienen una cola tx. Pierre Asselin (pa@panix.com) informó sobre el fallo del kernel en el foro de Gentoo: https://forums.gentoo.org/viewtopic-t-1147832-postdays-0-postorder-asc-start-25.html También confirmó que este parche soluciona el problema. En resumen, esto sucedió: Después de actualizar wpa_supplicant de 2.9 a 2.10, el kernel se bloqueó con un "error de división: 0000" al conectarse a un AP. El puerto de control tx ahora intenta usar IEEE80211_AC_VO para la prioridad, que wpa_supplicants comienza a usar en 2.10. Como solo la parte rtl8187se del controlador admite QoS, la prioridad del skb se establece en IEEE80211_AC_BE (2) por mac80211 para las tarjetas rtl8180/rtl8185. Luego, rtl8180 lee incondicionalmente la prioridad y finalmente se bloquea en la línea 544 de drivers/net/wireless/realtek/rtl818x/rtl8180/dev.c sin este parche: idx = (ring->idx + skb_queue_len(&ring->queue)) % ring->entries "ring->entries" es cero para las tarjetas rtl8180/rtl8185, tx_ring[2] nunca se inicializó.
References () https://git.kernel.org/stable/c/6ad81ad0cf5744738ce94c8e64051ddd80a1734c - () https://git.kernel.org/stable/c/6ad81ad0cf5744738ce94c8e64051ddd80a1734c - Patch
References () https://git.kernel.org/stable/c/746285cf81dc19502ab238249d75f5990bd2d231 - () https://git.kernel.org/stable/c/746285cf81dc19502ab238249d75f5990bd2d231 - Patch
References () https://git.kernel.org/stable/c/769ec2a824deae2f1268dfda14999a4d14d0d0c5 - () https://git.kernel.org/stable/c/769ec2a824deae2f1268dfda14999a4d14d0d0c5 - Patch
References () https://git.kernel.org/stable/c/98e55b0b876bde3353f4e074883d66ecb55c65a3 - () https://git.kernel.org/stable/c/98e55b0b876bde3353f4e074883d66ecb55c65a3 - Patch
References () https://git.kernel.org/stable/c/9ad1981fc4de3afb7db3e8eb5a6a52d4c7d0d577 - () https://git.kernel.org/stable/c/9ad1981fc4de3afb7db3e8eb5a6a52d4c7d0d577 - Patch
References () https://git.kernel.org/stable/c/9d5e96cc1f1720019ce27b127a31695148d38bb0 - () https://git.kernel.org/stable/c/9d5e96cc1f1720019ce27b127a31695148d38bb0 - Patch
References () https://git.kernel.org/stable/c/b5dca2cd3f0239512da808598b4e70557eb4c2a1 - () https://git.kernel.org/stable/c/b5dca2cd3f0239512da808598b4e70557eb4c2a1 - Patch
References () https://git.kernel.org/stable/c/b8ce58ab80faaea015c206382041ff3bcf5495ff - () https://git.kernel.org/stable/c/b8ce58ab80faaea015c206382041ff3bcf5495ff - Patch
References () https://git.kernel.org/stable/c/d7e30dfc166d33470bba31a42f9bbc346e5409d5 - () https://git.kernel.org/stable/c/d7e30dfc166d33470bba31a42f9bbc346e5409d5 - Patch
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 5.5

26 Feb 2025, 07:01

Type Values Removed Values Added
New CVE
Information

Published : 2025-02-26 07:01

Updated : 2025-03-13 21:50

NVD link : CVE-2022-49326

Mitre link : CVE-2022-49326

CVE.ORG link : CVE-2022-49326

JSON object : View

Products Affected

linux

  • linux_kernel
CWE
CWE-908

Use of Uninitialized Resource