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.

No CVSS v4.0

No CVSS v3.1

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00205.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
Linux Linux unaffected
Version Status Constraints
4211742f0f9e083188f4f0ada00d6eeeef31b7c7 affected < 606cc45e871e34b80a2f63874f069387a5b44176
b7fb4d78a6ade6026d9e5cf438c2a46ab962e032 affected < c462e15497dc40abe369b3be7a2c91ac5d1be6f9
b7fb4d78a6ade6026d9e5cf438c2a46ab962e032 affected < b5f92cc4e24a298bf390b0b189a4b888c0900161
b7fb4d78a6ade6026d9e5cf438c2a46ab962e032 affected < 6ad6954492697681ebcfc1beb0eb384406cd4b65
b7fb4d78a6ade6026d9e5cf438c2a46ab962e032 affected < eadd0c2c76aee6a738f17f251434c77db3c606c8
b7fb4d78a6ade6026d9e5cf438c2a46ab962e032 affected < d5b2752a17efc165793ae38f2c24b5ed9c04ffde
b7fb4d78a6ade6026d9e5cf438c2a46ab962e032 affected < 81bbcff0c053c4f5c711c31a9b72fc492bd96c3f
3ca8a07f141fd8eec347a82bdfa4b94164f2bb97 affected —
3ba83e46b591381e718007f55c9f831fd0cd7ee8 affected —
5.15.47 affected < 5.15.212
5.17.15 affected < 5.18
5.18.4 affected < 5.19
Linux Linux affected
Version Status Constraints
5.19 affected —
0 unaffected < 5.19
5.15.212 unaffected ≤ 5.15.*
6.1.178 unaffected ≤ 6.1.*
6.6.145 unaffected ≤ 6.6.*
6.12.97 unaffected ≤ 6.12.*
6.18.40 unaffected ≤ 6.18.*
7.1.5 unaffected ≤ 7.1.*
7.2-rc3 unaffected ≤ *

No data.

No data.

OpenCVE Enrichment is a feature of OpenCVE that uses AI to automatically link vendors and products to CVEs. Learn more on GitHub.

Vendors Products
Linux Subscribe
Linux Kernel Subscribe

Project Subscriptions

Vendors Products
Linux Subscribe
Linux Kernel Subscribe
Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://git.kernel.org/stable/c/606cc45e871e34b80a2f63874f069387a5b44176 cve-icon cve-icon
https://git.kernel.org/stable/c/6ad6954492697681ebcfc1beb0eb384406cd4b65 cve-icon cve-icon
https://git.kernel.org/stable/c/81bbcff0c053c4f5c711c31a9b72fc492bd96c3f cve-icon cve-icon
https://git.kernel.org/stable/c/b5f92cc4e24a298bf390b0b189a4b888c0900161 cve-icon cve-icon
https://git.kernel.org/stable/c/c462e15497dc40abe369b3be7a2c91ac5d1be6f9 cve-icon cve-icon
https://git.kernel.org/stable/c/d5b2752a17efc165793ae38f2c24b5ed9c04ffde cve-icon cve-icon
https://git.kernel.org/stable/c/eadd0c2c76aee6a738f17f251434c77db3c606c8 cve-icon cve-icon
History

Sat, 15 Aug 2026 06:00:00 +0000

Type Values Removed Values 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.
Title riscv: Prevent NULL pointer dereference in machine_kexec_prepare()
First Time appeared Linux
Linux linux Kernel
CPEs cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Vendors & Products Linux
Linux linux Kernel
References

Projects

Sign in to view the affected projects.

cve-icon MITRE

Status: PUBLISHED

Assigner: Linux

Published:

Updated: 2026-08-15T05:51:41.982Z

Reserved: 2026-08-09T03:40:39.899Z

Link: CVE-2026-72013

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-08-15T06:21:00.033

Modified: 2026-08-15T06:21:00.033

Link: CVE-2026-72013

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-08-15T09:15:04Z

Weaknesses

No weakness.