CVE-2026-53093: wifi: brcmfmac: Fix error pointer dereference
In the Linux kernel, the following vulnerability has been resolved:
wifi: brcmfmac: Fix error pointer dereference
The function brcmfchipaddcore() can return an error pointer and is not checked. Add checks for error pointer.
Detected by Smatch: drivers/net/wireless/broadcom/brcm80211/brcmfmac/chip.c:1010 brcmfchiprecognition() error: 'core' dereferencing possible ERRPTR()
drivers/net/wireless/broadcom/brcm80211/brcmfmac/chip.c:1013 brcmfchiprecognition() error: 'core' dereferencing possible ERRPTR()
drivers/net/wireless/broadcom/brcm80211/brcmfmac/chip.c:1016 brcmfchiprecognition() error: 'core' dereferencing possible ERRPTR()
drivers/net/wireless/broadcom/brcm80211/brcmfmac/chip.c:1019 brcmfchiprecognition() error: 'core' dereferencing possible ERRPTR()
drivers/net/wireless/broadcom/brcm80211/brcmfmac/chip.c:1022 brcmfchiprecognition() error: 'core' dereferencing possible ERRPTR()
[add missing wifi: prefix]
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 6.6.143.1-1
Event History
Frequently Asked Questions
What is the severity of CVE-2026-53093?
The severity of CVE-2026-53093 is rated as medium with a score of 5.5.
How do I fix CVE-2026-53093?
To fix CVE-2026-53093, ensure that you update your Linux kernel to the latest version that includes the necessary error pointer checks.
What type of vulnerability is CVE-2026-53093?
CVE-2026-53093 is a Linux kernel vulnerability related to an error pointer dereference in the brcmfmac driver.
Which systems are affected by CVE-2026-53093?
CVE-2026-53093 affects systems running the Linux kernel with the brcmfmac driver, including devices using the Microsoft azl3 kernel.
What is the impact of CVE-2026-53093?
The impact of CVE-2026-53093 could lead to denial of service due to an unhandled error pointer in the brcmfmac driver.