0.0
NA
CVE-2026-72013
riscv: Prevent NULL pointer dereference in machine_kexec_prepare()
Overview
Description
In the Linux kernel, the following vulnerability has been resolved: riscv: Prevent NULL pointer dereference in machine_kexec_prepare() A NULL pointer dereference issue is noticed in riscv's machine_kexec_prepare(), where image->segment[i].buf might be NULL and copied unchecked. The NULL buf comes from ima_add_kexec_buffer(), where kbuf is added by kexec_add_buffer(), but kbuf.buffer is NULL, then it is copied without a check in machine_kexec_prepare(): kexec_file_load -> kimage_file_alloc_init() -> kimage_file_prepare_segments() -> ima_add_kexec_buffer() -> kexec_add_buffer() -> machine_kexec_prepare() -> memcpy() Address this by adding a check before the data copy attempt.
Details
INFO
Published Date :
Aug. 15, 2026, 6:21 a.m.
Last Modified :
Aug. 17, 2026, 6:17 a.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Solution
Prevent NULL pointer dereference by checking buffer before copying data.
- Check if image->segment[i].buf is NULL before copying.
- Add NULL pointer check in machine_kexec_prepare().
- Apply the kernel patch to address the vulnerability.
References
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-72013.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-72013 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-72013
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-72013 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-72013 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Aug. 17, 2026
Action Type Old Value New Value Changed Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '4211742f0f9e083188f4f0ada00d6eeeef31b7c7', 'lessThan': '606cc45e871e34b80a2f63874f069387a5b44176', 'versionType': 'git'}, {'status': 'affected', 'version': 'b7fb4d78a6ade6026d9e5cf438c2a46ab962e032', 'lessThan': 'c462e15497dc40abe369b3be7a2c91ac5d1be6f9', 'versionType': 'git'}, {'status': 'affected', 'version': 'b7fb4d78a6ade6026d9e5cf438c2a46ab962e032', 'lessThan': 'b5f92cc4e24a298bf390b0b189a4b888c0900161', 'versionType': 'git'}, {'status': 'affected', 'version': 'b7fb4d78a6ade6026d9e5cf438c2a46ab962e032', 'lessThan': '6ad6954492697681ebcfc1beb0eb384406cd4b65', 'versionType': 'git'}, {'status': 'affected', 'version': 'b7fb4d78a6ade6026d9e5cf438c2a46ab962e032', 'lessThan': 'eadd0c2c76aee6a738f17f251434c77db3c606c8', 'versionType': 'git'}, {'status': 'affected', 'version': 'b7fb4d78a6ade6026d9e5cf438c2a46ab962e032', 'lessThan': 'd5b2752a17efc165793ae38f2c24b5ed9c04ffde', 'versionType': 'git'}, {'status': 'affected', 'version': 'b7fb4d78a6ade6026d9e5cf438c2a46ab962e032', 'lessThan': '81bbcff0c053c4f5c711c31a9b72fc492bd96c3f', 'versionType': 'git'}, {'status': 'affected', 'version': '3ca8a07f141fd8eec347a82bdfa4b94164f2bb97', 'versionType': 'git'}, {'status': 'affected', 'version': '3ba83e46b591381e718007f55c9f831fd0cd7ee8', 'versionType': 'git'}, {'status': 'affected', 'version': '5.15.47', 'lessThan': '5.15.212', 'versionType': 'semver'}, {'status': 'affected', 'version': '5.17.15', 'lessThan': '5.18', 'versionType': 'semver'}, {'status': 'affected', 'version': '5.18.4', 'lessThan': '5.19', 'versionType': 'semver'}], 'programFiles': ['arch/riscv/kernel/machine_kexec.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '5.19'}, {'status': 'unaffected', 'version': '0', 'lessThan': '5.19', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '5.15.212', 'versionType': 'semver', 'lessThanOrEqual': '5.15.*'}, {'status': 'unaffected', 'version': '6.1.178', 'versionType': 'semver', 'lessThanOrEqual': '6.1.*'}, {'status': 'unaffected', 'version': '6.6.145', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.97', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.40', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.5', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc3', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['arch/riscv/kernel/machine_kexec.c'], 'defaultStatus': 'affected'}] [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '4211742f0f9e083188f4f0ada00d6eeeef31b7c7', 'lessThan': '606cc45e871e34b80a2f63874f069387a5b44176', 'versionType': 'git'}, {'status': 'affected', 'version': 'b7fb4d78a6ade6026d9e5cf438c2a46ab962e032', 'lessThan': 'c462e15497dc40abe369b3be7a2c91ac5d1be6f9', 'versionType': 'git'}, {'status': 'affected', 'version': 'b7fb4d78a6ade6026d9e5cf438c2a46ab962e032', 'lessThan': 'b5f92cc4e24a298bf390b0b189a4b888c0900161', 'versionType': 'git'}, {'status': 'affected', 'version': 'b7fb4d78a6ade6026d9e5cf438c2a46ab962e032', 'lessThan': '6ad6954492697681ebcfc1beb0eb384406cd4b65', 'versionType': 'git'}, {'status': 'affected', 'version': 'b7fb4d78a6ade6026d9e5cf438c2a46ab962e032', 'lessThan': 'eadd0c2c76aee6a738f17f251434c77db3c606c8', 'versionType': 'git'}, {'status': 'affected', 'version': 'b7fb4d78a6ade6026d9e5cf438c2a46ab962e032', 'lessThan': 'd5b2752a17efc165793ae38f2c24b5ed9c04ffde', 'versionType': 'git'}, {'status': 'affected', 'version': 'b7fb4d78a6ade6026d9e5cf438c2a46ab962e032', 'lessThan': '81bbcff0c053c4f5c711c31a9b72fc492bd96c3f', 'versionType': 'git'}, {'status': 'affected', 'version': '3ca8a07f141fd8eec347a82bdfa4b94164f2bb97', 'versionType': 'git'}, {'status': 'affected', 'version': '3ba83e46b591381e718007f55c9f831fd0cd7ee8', 'versionType': 'git'}, {'status': 'affected', 'version': '5.15.47', 'lessThan': '5.15.212', 'versionType': 'semver'}, {'status': 'affected', 'version': '5.17.15', 'lessThan': '5.18', 'versionType': 'semver'}, {'status': 'affected', 'version': '5.18.4', 'lessThan': '5.19', 'versionType': 'semver'}], 'programFiles': ['arch/riscv/kernel/machine_kexec.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '5.19'}, {'status': 'unaffected', 'version': '0', 'lessThan': '5.19', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '5.15.212', 'versionType': 'semver', 'lessThanOrEqual': '5.15.*'}, {'status': 'unaffected', 'version': '6.1.178', 'versionType': 'semver', 'lessThanOrEqual': '6.1.*'}, {'status': 'unaffected', 'version': '6.6.145', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.97', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.40', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.5', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['arch/riscv/kernel/machine_kexec.c'], 'defaultStatus': 'affected'}] -
New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Aug. 15, 2026
Action Type Old Value New Value Added Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '4211742f0f9e083188f4f0ada00d6eeeef31b7c7', 'lessThan': '606cc45e871e34b80a2f63874f069387a5b44176', 'versionType': 'git'}, {'status': 'affected', 'version': 'b7fb4d78a6ade6026d9e5cf438c2a46ab962e032', 'lessThan': 'c462e15497dc40abe369b3be7a2c91ac5d1be6f9', 'versionType': 'git'}, {'status': 'affected', 'version': 'b7fb4d78a6ade6026d9e5cf438c2a46ab962e032', 'lessThan': 'b5f92cc4e24a298bf390b0b189a4b888c0900161', 'versionType': 'git'}, {'status': 'affected', 'version': 'b7fb4d78a6ade6026d9e5cf438c2a46ab962e032', 'lessThan': '6ad6954492697681ebcfc1beb0eb384406cd4b65', 'versionType': 'git'}, {'status': 'affected', 'version': 'b7fb4d78a6ade6026d9e5cf438c2a46ab962e032', 'lessThan': 'eadd0c2c76aee6a738f17f251434c77db3c606c8', 'versionType': 'git'}, {'status': 'affected', 'version': 'b7fb4d78a6ade6026d9e5cf438c2a46ab962e032', 'lessThan': 'd5b2752a17efc165793ae38f2c24b5ed9c04ffde', 'versionType': 'git'}, {'status': 'affected', 'version': 'b7fb4d78a6ade6026d9e5cf438c2a46ab962e032', 'lessThan': '81bbcff0c053c4f5c711c31a9b72fc492bd96c3f', 'versionType': 'git'}, {'status': 'affected', 'version': '3ca8a07f141fd8eec347a82bdfa4b94164f2bb97', 'versionType': 'git'}, {'status': 'affected', 'version': '3ba83e46b591381e718007f55c9f831fd0cd7ee8', 'versionType': 'git'}, {'status': 'affected', 'version': '5.15.47', 'lessThan': '5.15.212', 'versionType': 'semver'}, {'status': 'affected', 'version': '5.17.15', 'lessThan': '5.18', 'versionType': 'semver'}, {'status': 'affected', 'version': '5.18.4', 'lessThan': '5.19', 'versionType': 'semver'}], 'programFiles': ['arch/riscv/kernel/machine_kexec.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '5.19'}, {'status': 'unaffected', 'version': '0', 'lessThan': '5.19', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '5.15.212', 'versionType': 'semver', 'lessThanOrEqual': '5.15.*'}, {'status': 'unaffected', 'version': '6.1.178', 'versionType': 'semver', 'lessThanOrEqual': '6.1.*'}, {'status': 'unaffected', 'version': '6.6.145', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.97', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.40', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.5', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc3', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['arch/riscv/kernel/machine_kexec.c'], 'defaultStatus': 'affected'}] Added Description In the Linux kernel, the following vulnerability has been resolved: riscv: Prevent NULL pointer dereference in machine_kexec_prepare() A NULL pointer dereference issue is noticed in riscv's machine_kexec_prepare(), where image->segment[i].buf might be NULL and copied unchecked. The NULL buf comes from ima_add_kexec_buffer(), where kbuf is added by kexec_add_buffer(), but kbuf.buffer is NULL, then it is copied without a check in machine_kexec_prepare(): kexec_file_load -> kimage_file_alloc_init() -> kimage_file_prepare_segments() -> ima_add_kexec_buffer() -> kexec_add_buffer() -> machine_kexec_prepare() -> memcpy() Address this by adding a check before the data copy attempt. Added Reference https://git.kernel.org/stable/c/606cc45e871e34b80a2f63874f069387a5b44176 Added Reference https://git.kernel.org/stable/c/6ad6954492697681ebcfc1beb0eb384406cd4b65 Added Reference https://git.kernel.org/stable/c/81bbcff0c053c4f5c711c31a9b72fc492bd96c3f Added Reference https://git.kernel.org/stable/c/b5f92cc4e24a298bf390b0b189a4b888c0900161 Added Reference https://git.kernel.org/stable/c/c462e15497dc40abe369b3be7a2c91ac5d1be6f9 Added Reference https://git.kernel.org/stable/c/d5b2752a17efc165793ae38f2c24b5ed9c04ffde Added Reference https://git.kernel.org/stable/c/eadd0c2c76aee6a738f17f251434c77db3c606c8
EPSS is a daily estimate of the probability of exploitation activity
being observed over the next 30 days. Following chart shows the EPSS
score history of the vulnerability.