GHSA-3V9Q-M8X4-6CRJ
Vulnerability from github – Published: 2025-03-14 00:30 – Updated: 2025-03-14 00:30In 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.
{
"affected": [],
"aliases": [
"CVE-2022-49326"
],
"database_specific": {
"cwe_ids": [
"CWE-908"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-02-26T07:01:09Z",
"severity": "MODERATE"
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nrtl818x: Prevent using not initialized queues\n\nUsing not existing queues can panic the kernel with rtl8180/rtl8185 cards.\nIgnore the skb priority for those cards, they only have one tx queue. Pierre\nAsselin (pa@panix.com) reported the kernel crash in the Gentoo forum:\n\nhttps://forums.gentoo.org/viewtopic-t-1147832-postdays-0-postorder-asc-start-25.html\n\nHe also confirmed that this patch fixes the issue. In summary this happened:\n\nAfter updating wpa_supplicant from 2.9 to 2.10 the kernel crashed with a\n\"divide error: 0000\" when connecting to an AP. Control port tx now tries to\nuse IEEE80211_AC_VO for the priority, which wpa_supplicants starts to use in\n2.10.\n\nSince only the rtl8187se part of the driver supports QoS, the priority\nof the skb is set to IEEE80211_AC_BE (2) by mac80211 for rtl8180/rtl8185\ncards.\n\nrtl8180 is then unconditionally reading out the priority and finally crashes on\ndrivers/net/wireless/realtek/rtl818x/rtl8180/dev.c line 544 without this\npatch:\n\tidx = (ring-\u003eidx + skb_queue_len(\u0026ring-\u003equeue)) % ring-\u003eentries\n\n\"ring-\u003eentries\" is zero for rtl8180/rtl8185 cards, tx_ring[2] never got\ninitialized.",
"id": "GHSA-3v9q-m8x4-6crj",
"modified": "2025-03-14T00:30:51Z",
"published": "2025-03-14T00:30:51Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2022-49326"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/6ad81ad0cf5744738ce94c8e64051ddd80a1734c"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/746285cf81dc19502ab238249d75f5990bd2d231"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/769ec2a824deae2f1268dfda14999a4d14d0d0c5"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/98e55b0b876bde3353f4e074883d66ecb55c65a3"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/9ad1981fc4de3afb7db3e8eb5a6a52d4c7d0d577"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/9d5e96cc1f1720019ce27b127a31695148d38bb0"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/b5dca2cd3f0239512da808598b4e70557eb4c2a1"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/b8ce58ab80faaea015c206382041ff3bcf5495ff"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/d7e30dfc166d33470bba31a42f9bbc346e5409d5"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
]
}
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