CVE-2024-35811

Medium

In the Linux kernel, the following vulnerability has been resolved: wifi: brcmfmac: Fix use-after-free bug in brcmf_cfg80211_detach This is the candidate patch of CVE-2023-47233 : https://nvd.nist.gov/vuln/detail/CVE-2023-47233 In brcm80211 driver,it starts with the following invoking chain to start init a timeout worker: ->brcmf_usb_probe ->brcmf_usb_probe_cb ->brcmf_attach ->brcmf_bus_started ->brcmf_cfg80211_attach ->wl_init_priv ->brcmf_init_escan ->INIT_WORK(&cfg->escan_timeout_work, brcmf_cfg80211_escan_timeout_worker); If we disconnect the USB by hotplug, it will call brcmf_usb_disconnect to make cleanup. The invoking chain is : brcmf_usb_disconnect ->brcmf_usb_disconnect_cb ->brcmf_detach ->brcmf_cfg80211_detach ->kfree(cfg); While the timeout woker may still be running. This will cause a use-after-free bug on cfg in brcmf_cfg80211_escan_timeout_worker. Fix it by deleting the timer and canceling the worker in brcmf_cfg80211_detach. [[email protected]: keep timer delete as is and cancel work just before free]

Package Linux Kernel
Published 2024-05-17
Last modified 2026-05-12
CVSS version 3.1
Patch available
Yes

CVSS 3.1 score

5.5

out of 10
Medium
Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
High
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Weakness type

CWE-416

CVE-2024-35811 is a Use After Free vulnerability

What is Use After Free?

The product references memory after it has been freed, which may cause it to crash, use unexpected values, or execute code. Learn more on MITRE CWE

Affected versions

Linux kernel versions 3.7 and later are affected. Fixed in 4.19.312, 5.4.274, 5.10.215, 5.15.154, 6.1.84, 6.6.24, 6.7.12, 6.8.3, 6.9 and their respective stable series.

Affected from
≥ 3.7
Fixed in
✓ 4.19.312 4.19.x ✓ 5.4.274 5.4.x ✓ 5.10.215 5.10.x ✓ 5.15.154 5.15.x ✓ 6.1.84 6.1.x ✓ 6.6.24 6.6.x ✓ 6.7.12 6.7.x ✓ 6.8.3 6.8.x ✓ 6.9

References

12 total
Showing 5 of 12 references View all on NVD

Frequently asked questions

  • What is CVE-2024-35811?

    CVE-2024-35811 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10 , classified as an Use After Free flaw (CWE-416) . It affects Linux kernel versions from 3.7 onward and has been patched in 4.19.312, 5.4.274, 5.10.215 and others. CVE-2024-35811 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

  • What is the CVSS score for CVE-2024-35811?

    CVE-2024-35811 has a CVSS score of 5.5 out of 10, rated Medium severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H .

  • Is there a patch available for CVE-2024-35811?

    Yes. CVE-2024-35811 has been patched. Fixed versions include 4.19.312, 5.4.274, 5.10.215 and others. If you are running Linux kernel 3.7 or later up to the fix versions, apply the relevant patch for your kernel branch.

  • Is CVE-2024-35811 actively exploited?

    No. CVE-2024-35811 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

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