CVE-2022-49326 (GCVE-0-2022-49326)

Vulnerability from cvelistv5 – Published: 2025-02-26 02:10 – Updated: 2025-12-23 13:23
VLAI?
Title
rtl818x: Prevent using not initialized queues
Summary
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.
Severity ?
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE
  • CWE-908 - Use of Uninitialized Resource
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: fd6564fcdc0bfcd432e6e939f9538acc3905d08a , < b5dca2cd3f0239512da808598b4e70557eb4c2a1 (git)
Affected: fd6564fcdc0bfcd432e6e939f9538acc3905d08a , < d7e30dfc166d33470bba31a42f9bbc346e5409d5 (git)
Affected: fd6564fcdc0bfcd432e6e939f9538acc3905d08a , < 9d5e96cc1f1720019ce27b127a31695148d38bb0 (git)
Affected: fd6564fcdc0bfcd432e6e939f9538acc3905d08a , < b8ce58ab80faaea015c206382041ff3bcf5495ff (git)
Affected: fd6564fcdc0bfcd432e6e939f9538acc3905d08a , < 769ec2a824deae2f1268dfda14999a4d14d0d0c5 (git)
Affected: fd6564fcdc0bfcd432e6e939f9538acc3905d08a , < 6ad81ad0cf5744738ce94c8e64051ddd80a1734c (git)
Affected: fd6564fcdc0bfcd432e6e939f9538acc3905d08a , < 9ad1981fc4de3afb7db3e8eb5a6a52d4c7d0d577 (git)
Affected: fd6564fcdc0bfcd432e6e939f9538acc3905d08a , < 98e55b0b876bde3353f4e074883d66ecb55c65a3 (git)
Affected: fd6564fcdc0bfcd432e6e939f9538acc3905d08a , < 746285cf81dc19502ab238249d75f5990bd2d231 (git)
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    Linux Linux Affected: 3.15
Unaffected: 0 , < 3.15 (semver)
Unaffected: 4.9.318 , ≤ 4.9.* (semver)
Unaffected: 4.14.283 , ≤ 4.14.* (semver)
Unaffected: 4.19.247 , ≤ 4.19.* (semver)
Unaffected: 5.4.198 , ≤ 5.4.* (semver)
Unaffected: 5.10.121 , ≤ 5.10.* (semver)
Unaffected: 5.15.46 , ≤ 5.15.* (semver)
Unaffected: 5.17.14 , ≤ 5.17.* (semver)
Unaffected: 5.18.3 , ≤ 5.18.* (semver)
Unaffected: 5.19 , ≤ * (original_commit_for_fix)
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          "value": "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."
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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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