Out-of-bounds read in Linux kernel - CVE-2026-64443
Published: July 27, 2026
Vulnerability identifier: #VU139507
CSH Severity: Low
CVSS v4: 5.3 [CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-64443
CWE-ID: CWE-125
Exploitation vector: Adjecent network
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to disclose sensitive information.
The vulnerability exists due to an out-of-bounds read in the update_beacon_info() IE parsing loop in rtl8723bs when parsing a crafted Beacon frame from a malicious access point. A remote attacker can send a specially crafted Beacon frame to disclose sensitive information.
The issue can be triggered when the last information element is truncated or when an information element declares a length that extends past the available frame data.
Affected software
Linux kernel
How to mitigate CVE-2026-64443
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3
External References
- https://git.kernel.org/stable/c/5e8db4cff5b45c7c4edc8ae3f302027c3bb32b25
- https://git.kernel.org/stable/c/69f174a0673b6b7a29b851adb60bc450cdc0ecc4
- https://git.kernel.org/stable/c/6dd5e8c3011ebabf417257d7f07901a7c4311539
- https://git.kernel.org/stable/c/9193c34f75fd9e1ea8a590d7cced464c3380dc29
- https://git.kernel.org/stable/c/b5cc2f999927f69723ca53f1f2a3aa37dbeda907
- https://git.kernel.org/stable/c/bd953d52d587d42365e399b96c52dbdb13032070
- https://git.kernel.org/stable/c/ed51de4a86e173c3b0ef78e039c2e49e08b11f16