SB20260816510 - NULL pointer dereference in Linux kernel riscv kernel
Published: August 16, 2026
Security Bulletin ID
SB20260816510
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) NULL pointer dereference (CVE-ID: CVE-2026-72013)
CWE-ID: CWE-476 - NULL Pointer Dereference
CVSSv4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to a NULL pointer dereference in machine_kexec_prepare() when processing kexec image segments. A local user can provide a kexec image segment with a NULL buffer pointer to cause a denial of service.
The issue occurs in the RISC-V kexec path during handling of segments prepared through kexec_file_load().
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/606cc45e871e34b80a2f63874f069387a5b44176
- https://git.kernel.org/stable/c/6ad6954492697681ebcfc1beb0eb384406cd4b65
- https://git.kernel.org/stable/c/81bbcff0c053c4f5c711c31a9b72fc492bd96c3f
- https://git.kernel.org/stable/c/b5f92cc4e24a298bf390b0b189a4b888c0900161
- https://git.kernel.org/stable/c/c462e15497dc40abe369b3be7a2c91ac5d1be6f9
- https://git.kernel.org/stable/c/d5b2752a17efc165793ae38f2c24b5ed9c04ffde
- https://git.kernel.org/stable/c/eadd0c2c76aee6a738f17f251434c77db3c606c8