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.

No CVSS v4.0

Attack Vector Local

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00011.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
Linux Linux unaffected
Version Status Constraints
fd6564fcdc0bfcd432e6e939f9538acc3905d08a affected
< b5dca2cd3f0239512da808598b4e70557eb4c2a1
fd6564fcdc0bfcd432e6e939f9538acc3905d08a affected
< d7e30dfc166d33470bba31a42f9bbc346e5409d5
fd6564fcdc0bfcd432e6e939f9538acc3905d08a affected
< 9d5e96cc1f1720019ce27b127a31695148d38bb0
fd6564fcdc0bfcd432e6e939f9538acc3905d08a affected
< b8ce58ab80faaea015c206382041ff3bcf5495ff
fd6564fcdc0bfcd432e6e939f9538acc3905d08a affected
< 769ec2a824deae2f1268dfda14999a4d14d0d0c5
fd6564fcdc0bfcd432e6e939f9538acc3905d08a affected
< 6ad81ad0cf5744738ce94c8e64051ddd80a1734c
fd6564fcdc0bfcd432e6e939f9538acc3905d08a affected
< 9ad1981fc4de3afb7db3e8eb5a6a52d4c7d0d577
fd6564fcdc0bfcd432e6e939f9538acc3905d08a affected
< 98e55b0b876bde3353f4e074883d66ecb55c65a3
fd6564fcdc0bfcd432e6e939f9538acc3905d08a affected
< 746285cf81dc19502ab238249d75f5990bd2d231
Linux Linux affected
Version Status Constraints
3.15 affected
—
0 unaffected
< 3.15
4.9.318 unaffected
≤ 4.9.*
4.14.283 unaffected
≤ 4.14.*
4.19.247 unaffected
≤ 4.19.*
5.4.198 unaffected
≤ 5.4.*
5.10.121 unaffected
≤ 5.10.*
5.15.46 unaffected
≤ 5.15.*
5.17.14 unaffected
≤ 5.17.*
5.18.3 unaffected
≤ 5.18.*
5.19 unaffected
≤ *

Configuration 1 [-]

OR cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

No data.

No data.

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Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://git.kernel.org/stable/c/6ad81ad0cf5744738ce94c8e64051ddd80a1734c cve-icon cve-icon
https://git.kernel.org/stable/c/746285cf81dc19502ab238249d75f5990bd2d231 cve-icon cve-icon
https://git.kernel.org/stable/c/769ec2a824deae2f1268dfda14999a4d14d0d0c5 cve-icon cve-icon
https://git.kernel.org/stable/c/98e55b0b876bde3353f4e074883d66ecb55c65a3 cve-icon cve-icon
https://git.kernel.org/stable/c/9ad1981fc4de3afb7db3e8eb5a6a52d4c7d0d577 cve-icon cve-icon
https://git.kernel.org/stable/c/9d5e96cc1f1720019ce27b127a31695148d38bb0 cve-icon cve-icon
https://git.kernel.org/stable/c/b5dca2cd3f0239512da808598b4e70557eb4c2a1 cve-icon cve-icon
https://git.kernel.org/stable/c/b8ce58ab80faaea015c206382041ff3bcf5495ff cve-icon cve-icon
https://git.kernel.org/stable/c/d7e30dfc166d33470bba31a42f9bbc346e5409d5 cve-icon cve-icon
https://lore.kernel.org/linux-cve-announce/2025022638-CVE-2022-49326-7834@gregkh/T cve-icon
https://nvd.nist.gov/vuln/detail/CVE-2022-49326 cve-icon
https://www.cve.org/CVERecord?id=CVE-2022-49326 cve-icon
History

Thu, 13 Mar 2025 22:15:00 +0000

Type Values Removed Values Added
First Time appeared Linux
Linux linux Kernel
Weaknesses CWE-908
CPEs cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Vendors & Products Linux
Linux linux Kernel

Fri, 28 Feb 2025 01:30:00 +0000

Type Values Removed Values Added
References
Metrics threat_severity

None

 cvssV3_1

{'score': 5.5, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'}

threat_severity

Moderate

Wed, 26 Feb 2025 02:45:00 +0000

Type Values Removed Values Added
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.
Title rtl818x: Prevent using not initialized queues
References
cve-icon MITRE

Status: PUBLISHED

Assigner: Linux

Published:

Updated: 2025-12-23T13:23:41.035Z

Reserved: 2025-02-26T02:08:31.538Z

Link: CVE-2022-49326

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Modified

Published: 2025-02-26T07:01:09.417

Modified: 2025-10-01T20:16:09.070

Link: CVE-2022-49326

cve-icon Redhat

Severity : Moderate

Publid Date: 2025-02-26T00:00:00Z

Links: CVE-2022-49326 - Bugzilla

cve-icon OpenCVE Enrichment

No data.

Weaknesses