Out-of-bounds read in Linux kernel - CVE-2026-72396

Vulnerability identifier: #VU143038

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-2026-72396

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 an out-of-bounds read in adm1275_probe() when comparing a device-provided model string returned by i2c_smbus_read_block_data(). A local user can provide a shortened crafted device string to cause the kernel to read uninitialized stack memory and disclose sensitive information.

Exploitation requires access to a device handled by the adm1275 hwmon driver.

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/36554592e2f5cac16ff8bf73720d38a6d9ef4a20
• https://git.kernel.org/stable/c/39a581bd64a0e91112ec8017a2dd4e70c1336e99
• https://git.kernel.org/stable/c/553f9517813912a5ab661af5504485d96824a61c
• https://git.kernel.org/stable/c/57d583f069fa9d3d0c0831e34b967d1f61edae94
• https://git.kernel.org/stable/c/82e4ab03a6ab9b87667410f5143bc484d7a62bdc
• https://git.kernel.org/stable/c/93b96e723bdcba6172a5814262be875abcc5d269
• https://git.kernel.org/stable/c/aa35cee30686e6be3c890bf741429c5025d55abe
• https://git.kernel.org/stable/c/c9e04a52663bc6651c06c2427df088b751062bd6

• Out-of-bounds read in Linux kernel hwmon pmbus driver
• 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