CVE-2022-49326

MEDIUM EPSS 18.7%
Published Feb 26, 20251y ago · Modified Jun 17, 20261w ago
5.5 CVSS 3.1
Medium
Find Similar
Published Feb 26, 2025 1y ago
Last Modified Jun 17, 2026 1w ago

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.

CVSS Details

Base Score
5.5
Exploitability
1.8
Impact
3.6
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
18.7% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-908

Affected Products 8

VendorProductVersionRange
linuxlinux_kernel* <4.9.318
linuxlinux_kernel*≥4.10  –  <4.14.283
linuxlinux_kernel*≥4.15  –  <4.19.247
linuxlinux_kernel*≥4.20  –  <5.4.198
linuxlinux_kernel*≥5.5  –  <5.10.121
linuxlinux_kernel*≥5.11  –  <5.15.46
linuxlinux_kernel*≥5.16  –  <5.17.14
linuxlinux_kernel*≥5.18  –  <5.18.3

References 9

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

Remediation

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