Use of uninitialized resource in Linux kernel - CVE-2026-72441

Vulnerability identifier: #VU143009

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-2026-72441

CWE-ID: CWE-908

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 uninitialized memory usage in dgram_recvmsg() when copying a socket address to user space after parsing an IEEE 802.15.4 address with mode IEEE802154_ADDR_NONE. A local user can receive a crafted packet and invoke recvmsg() to disclose sensitive information.

The issue occurs because the pan_id field of struct ieee802154_addr is left uninitialized when the address mode is IEEE802154_ADDR_NONE.

Linux kernel
Ubuntu
linux-nvidia (Ubuntu package)
linux-gcp-7.0 (Ubuntu package)
linux (Ubuntu package)
linux-oem-7.0 (Ubuntu package)
linux-azure-7.0 (Ubuntu package)
linux-azure (Ubuntu package)

Install security update from vendor's repository.

Linux kernel - update to 7.0 rc3
linux-nvidia (Ubuntu package) - addressed in versions 5.15.0-1112.113, 5.15.0.1112.112
linux-gcp-7.0 (Ubuntu package) - addressed in versions 7.0.0-38.38~24.04.4, 7.0.0-1013.13~24.04.1, 7.0.0-1014.14~24.04.1
linux (Ubuntu package) - addressed in versions 7.0.0-38.38, 7.0.0-38.38.1, 7.0.0-1008.9, 7.0.0-1013.13~24.04.1, 7.0.0-1014.14, 7.0.0-1015.15
linux-oem-7.0 (Ubuntu package) - update to 7.0.0-1015.15
linux-azure-7.0 (Ubuntu package) - addressed in versions 7.0.0-1016.16~24.04.1, 7.0.0-1017.17~24.04.1
linux-azure (Ubuntu package) - addressed in versions 7.0.0-1016.16, 7.0.0-1017.17

• https://git.kernel.org/stable/c/09cfe665f2c5d7a8a5ed4d6b487434a011325368
• https://git.kernel.org/stable/c/4db86f8ab11b5a41bfc36680be837e6ac1375ec6
• https://git.kernel.org/stable/c/71b5add66c51d6764325de5f2e300bbf4f39e7a6
• https://git.kernel.org/stable/c/a2ee1a038a16e286d084bc293a7522d010a59ec3
• https://git.kernel.org/stable/c/c88e687e44cb9c7690f5039a5a5941dba1f6a204
• https://git.kernel.org/stable/c/de3bd9809af7555611334cb6a071806744430ef7
• https://git.kernel.org/stable/c/f14802465f5956baafe5f4b4541eb626b06b41f1
• https://git.kernel.org/stable/c/fc8766467b53335220b4b594ba15bc8f8cee0c76

• Use of uninitialized resource in Linux kernel ieee802154
• Ubuntu update for linux-gcp-7.0
• Ubuntu update for linux-nvidia
• Ubuntu update for linux-azure-7.0
• Ubuntu update for linux
• Ubuntu update for linux-azure
• Ubuntu update for linux-oem-7.0