SB20260816382 - Use of Uninitialized Variable in Linux kernel sunrpc

Description

This security bulletin contains information about 1 vulnerability.

1) Use of Uninitialized Variable (CVE-ID: CVE-2026-72150)

CWE-ID: CWE-457 - Use of Uninitialized Variable

CVSSv4: 6.9 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N]

The vulnerability allows a local user to cause a denial of service or disclose sensitive information.

The vulnerability exists due to uninitialized memory in rpc_sysfs_xprt_switch_add_xprt_store() when handling sysfs input for transport creation. A local user can submit crafted input that triggers use of uninitialized structure fields to cause a denial of service or disclose sensitive information.

Uninitialized fields such as srcaddr, bc_xps, and flags may lead to unpredictable behavior depending on stack contents.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/17d90b68c3a3d7d7e95b49e1fe9381a723f637a8
• https://git.kernel.org/stable/c/7d3ce3bd23c062a7c1c6d372d1b08e48b9e17cc3
• https://git.kernel.org/stable/c/933654508b2bc36e2c3c086c0365e2403fb2141f