CVE - CVE-2022-49326

CVE-ID
CVE-2022-49326	Learn more at National Vulnerability Database (NVD) • CVSS Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings • CPE Information
Description
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.
References
Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
MISC:https://git.kernel.org/stable/c/6ad81ad0cf5744738ce94c8e64051ddd80a1734c URL:https://git.kernel.org/stable/c/6ad81ad0cf5744738ce94c8e64051ddd80a1734c MISC:https://git.kernel.org/stable/c/746285cf81dc19502ab238249d75f5990bd2d231 URL:https://git.kernel.org/stable/c/746285cf81dc19502ab238249d75f5990bd2d231 MISC:https://git.kernel.org/stable/c/769ec2a824deae2f1268dfda14999a4d14d0d0c5 URL:https://git.kernel.org/stable/c/769ec2a824deae2f1268dfda14999a4d14d0d0c5 MISC:https://git.kernel.org/stable/c/98e55b0b876bde3353f4e074883d66ecb55c65a3 URL:https://git.kernel.org/stable/c/98e55b0b876bde3353f4e074883d66ecb55c65a3 MISC:https://git.kernel.org/stable/c/9ad1981fc4de3afb7db3e8eb5a6a52d4c7d0d577 URL:https://git.kernel.org/stable/c/9ad1981fc4de3afb7db3e8eb5a6a52d4c7d0d577 MISC:https://git.kernel.org/stable/c/9d5e96cc1f1720019ce27b127a31695148d38bb0 URL:https://git.kernel.org/stable/c/9d5e96cc1f1720019ce27b127a31695148d38bb0 MISC:https://git.kernel.org/stable/c/b5dca2cd3f0239512da808598b4e70557eb4c2a1 URL:https://git.kernel.org/stable/c/b5dca2cd3f0239512da808598b4e70557eb4c2a1 MISC:https://git.kernel.org/stable/c/b8ce58ab80faaea015c206382041ff3bcf5495ff URL:https://git.kernel.org/stable/c/b8ce58ab80faaea015c206382041ff3bcf5495ff MISC:https://git.kernel.org/stable/c/d7e30dfc166d33470bba31a42f9bbc346e5409d5 URL:https://git.kernel.org/stable/c/d7e30dfc166d33470bba31a42f9bbc346e5409d5
Assigning CNA
kernel.org
Date Record Created
20250226	Disclaimer: The record creation date may reflect when the CVE ID was allocated or reserved, and does not necessarily indicate when this vulnerability was discovered, shared with the affected vendor, publicly disclosed, or updated in CVE.
Phase (Legacy)
Assigned (20250226)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
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