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CVE PROGRAM SOURCE RECORD5.5 Medium

CVE-2022-49326

rtl818x: Prevent using not initialized queues

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Status
Published
Published
Updated
Assigning organization
Linux

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.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Linux Linux

Default version status: unaffected

  • fd6564fcdc0bfcd432e6e939f9538acc3905d08a to < b5dca2cd3f0239512da808598b4e70557eb4c2a1affected
  • fd6564fcdc0bfcd432e6e939f9538acc3905d08a to < d7e30dfc166d33470bba31a42f9bbc346e5409d5affected
  • fd6564fcdc0bfcd432e6e939f9538acc3905d08a to < 9d5e96cc1f1720019ce27b127a31695148d38bb0affected
  • fd6564fcdc0bfcd432e6e939f9538acc3905d08a to < b8ce58ab80faaea015c206382041ff3bcf5495ffaffected
  • fd6564fcdc0bfcd432e6e939f9538acc3905d08a to < 769ec2a824deae2f1268dfda14999a4d14d0d0c5affected
  • fd6564fcdc0bfcd432e6e939f9538acc3905d08a to < 6ad81ad0cf5744738ce94c8e64051ddd80a1734caffected
  • fd6564fcdc0bfcd432e6e939f9538acc3905d08a to < 9ad1981fc4de3afb7db3e8eb5a6a52d4c7d0d577affected
  • fd6564fcdc0bfcd432e6e939f9538acc3905d08a to < 98e55b0b876bde3353f4e074883d66ecb55c65a3affected
  • fd6564fcdc0bfcd432e6e939f9538acc3905d08a to < 746285cf81dc19502ab238249d75f5990bd2d231affected

Linux Linux

Default version status: affected

  • 3.15affected
  • 0 to < 3.15unaffected
  • 4.9.318 to ≤ 4.9.*unaffected
  • 4.14.283 to ≤ 4.14.*unaffected
  • 4.19.247 to ≤ 4.19.*unaffected
  • 5.4.198 to ≤ 5.4.*unaffected
  • 5.10.121 to ≤ 5.10.*unaffected
  • 5.15.46 to ≤ 5.15.*unaffected
  • 5.17.14 to ≤ 5.17.*unaffected
  • 5.18.3 to ≤ 5.18.*unaffected
  • 5.19 to ≤ *unaffected

References