Out-of-bounds read in Linux kernel - CVE-2026-64441

Vulnerability identifier: #VU139504

CSH Severity: Low

CVSS v4: 4.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]

CVE-ID: CVE-2026-64441

CWE-ID: CWE-125

Exploitation vector: Local access

Exploit availability: No public exploit available

The vulnerability allows a local user to disclose sensitive information.

The vulnerability exists due to out-of-bounds read in IE and WPS attribute parsing functions in drivers/staging/rtl8723bs/core/rtw_ieee80211.c when parsing crafted information element buffers. A local user can provide a specially crafted buffer to disclose sensitive information.

The issue affects rtw_get_sec_ie(), rtw_get_wapi_ie(), and rtw_get_wps_attr().

Linux kernel
Debian Linux
Ubuntu
linux (Debian package)
linux (Ubuntu package)
linux-gcp-7.0 (Ubuntu package)
linux-oem-7.0 (Ubuntu package)

Install security update from vendor's repository.

Linux kernel - update to 7.0 rc3
linux (Debian package) - update to 6.12.100-1
linux (Ubuntu package) - addressed in versions 7.0.0-31.31, 7.0.0-31.31.1, 7.0.0-31.31~24.04.1, 7.0.0-1006.7, 7.0.0-1011.11~24.04.1, 7.0.0-1012.12, 7.0.0-1012.12~24.04.1
linux-gcp-7.0 (Ubuntu package) - update to 7.0.0-1011.11~24.04.1
linux-oem-7.0 (Ubuntu package) - update to 7.0.0-1013.13

• https://git.kernel.org/stable/c/1463ca3ec6601cbb097d8d87dbf5dcf1cb86a344
• https://git.kernel.org/stable/c/2ea1ce30ead61589214240e8d33d96310fd613e5
• https://git.kernel.org/stable/c/4b51ee8a40fe47864197d73cc02b191de7a6b072
• https://git.kernel.org/stable/c/6ab1161e539fb7a1c8b35ff5a6ced4702e855b9c
• https://git.kernel.org/stable/c/729c4e72563bda0f1725db1db9ea08df06f41d9b
• https://git.kernel.org/stable/c/b27ecba3196f6c14e3809595ebd69c0c2392512a
• https://git.kernel.org/stable/c/efa27d487abcdec79669a60a6d94d5d6eceb7c1d

• Out-of-bounds read in Linux kernel rtl8723bs core driver
• Debian update for linux
• Ubuntu update for linux-oem-7.0
• Ubuntu update for linux
• Ubuntu update for linux-gcp-7.0