CVE-2023-47233 Use after free in n/a

What is CVE-2023-47233?

CVE-2023-47233 is a medium-severity use after free vulnerability in Linux kernel, published on 3 Nov 2023. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

The brcm80211 component in the Linux kernel through 6.5.10 has a brcmf_cfg80211_detach use-after-free in the device unplugging (disconnect the USB by hotplug) code. For physically proximate attackers with local access, this "could be exploited in a real world scenario." This is related to brcmf_cfg80211_escan_timeout_worker in drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c.

Weakness: CWE-416

Which versions are affected by CVE-2023-47233?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2023-47233?

Apply the vendor's patch.

Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.

Is CVE-2023-47233 being exploited?

There is no known exploitation of CVE-2023-47233 in the wild and no public exploit code.

Other vulnerabilities in Linux kernel

• CVE-2026-53266 Linux Kernel Out-of-Bounds Write Exploited High 8.8
• CVE-2013-6282 Linux Kernel Improper Input Validation Exploited High 8.8
• CVE-2022-0185 Linux Kernel Heap-Based Buffer Overflow Exploited High 8.4
• CVE-2013-2094 Linux Kernel Privilege Escalation Exploited High 8.4
• CVE-2026-53362 Linux Kernel Unspecified Exploited High 7.8

All Linux kernel vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as AZL-31942, BELL-CVE-2023-47233, DEBIAN-CVE-2023-47233, GHSA-mwhp-8ffr-hvvg, UBUNTU-CVE-2023-47233.