SECUFOCUSNOW
Home›CVE index›CVE-2022-49328
Review reviewHigh

CVE-2022-49328

Linux Linux, linux kernel

In the Linux kernel, the following vulnerability has been resolved: mt76: fix use-after-free by removing a non-RCU wcid pointer Fixes an issue caught by KASAN about use-after-free in mt76_txq_schedule by protecting mtxq->wcid with rcu_lock between mt76_txq_schedule and sta_info_[alloc, free]. [18853.876689] ================================================================== [18853.876751] BUG: KASAN: use-after-free in mt76_txq_schedule+0x204/0xaf8 [mt76] [18853.876773] Read of size 8 at addr ffffffaf989a2138 by task mt76-tx phy0/883 [18853.876786] [18853.876810] CPU: 5 PID: 883 Comm: mt76-tx...

CVSS
8.8
EPSS
0.42%
34.2% percentile
CISA KEV
Not listed
Published
2025.02.26
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability0.42%
Technical severityCVSS 8.8

Vulnerability overview

In the Linux kernel, the following vulnerability has been resolved: mt76: fix use-after-free by removing a non-RCU wcid pointer Fixes an issue caught by KASAN about use-after-free in mt76_txq_schedule by protecting mtxq->wcid with rcu_lock between mt76_txq_schedule and sta_info_[alloc, free]. [18853.876689] ================================================================== [18853.876751] BUG: KASAN: use-after-free in mt76_txq_schedule+0x204/0xaf8 [mt76] [18853.876773] Read of size 8 at addr ffffffaf989a2138 by task mt76-tx phy0/883 [18853.876786] [18853.876810] CPU: 5 PID: 883 Comm: mt76-tx...

Affected product and versions

Product
Linux Linux, linux kernel
Affected versions
>= 7bc04215a66b60e198aecaee8418f6d79fa19faa < 4448327b41738dbfcda680eb4935ff835568f468, >= 7bc04215a66b60e198aecaee8418f6d79fa19faa < e55bcdd0bf34a8b10d45ce80ebb3164c5292a17d, >= 7bc04215a66b60e198aecaee8418f6d79fa19faa < d5f77f1dbb59feae81f88e44551e8e1d8a802d9a, >= 7bc04215a66b60e198aecaee8418f6d79fa19faa < 51fb1278aa57ae0fc54adaa786e1965362bed4fb, >= 4.16, < 5.15.58, >= 5.16 < 5.17.14, >= 5.18 < 5.18.3
Fixed versions
5.15.58, 5.17.14, 5.18.3

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that Linux Linux, linux kernel and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CWE
CWE-416