# CVE-2022-49326: linux: In the Linux kernel, the following vulnerability has been resolved:  rtl818x: Prevent using not initialized queues  U...

CVE-2022-49326 is fixed in linux on 1 platform, first by DEBIAN-CVE-2022-49326, released February 26, 2025. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2022-49326
- Priority: Routine
- CVSS: 5.5 (medium)
- EPSS: 0.0030
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Feb 26, 2025

## 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.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 12.15 (bookworm) | 5.18.5-1 | [DEBIAN-CVE-2022-49326](https://patchblox.com/security/data/fix/linux/debian-cve-2022-49326.md) | Feb 26, 2025 |
| Linux | linux Debian 13.5 (trixie) | 5.18.5-1 | [DEBIAN-CVE-2022-49326](https://patchblox.com/security/data/fix/linux/debian-cve-2022-49326.md) | Feb 26, 2025 |
| Linux | linux Debian 14 | 5.18.5-1 | [DEBIAN-CVE-2022-49326](https://patchblox.com/security/data/fix/linux/debian-cve-2022-49326.md) | Feb 26, 2025 |

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Data as of 2026-11-08T06:59:42Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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