Not yet scoredPublished Aug 15, 2026

CVE-2026-72013riscv: Prevent NULL pointer dereference in machine_kexec_prepare()

Updated under an hour ago (Oct 26, 2026, 2:30 PM ET)

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No exploitation reported and no EPSS estimate yet.

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Exploited in the last 30 days

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.

CVSS: Not yet scored
Weakness (CWE): Not given
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Received
Record last updated: Aug 17, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	4211742f0f9e083188f4f0ada00d6eeeef31b7c7 builds before 606cc45e871e34b80a2f63874f069387a5b44176; from b7fb4d78a6ade6026d9e5cf438c2a46ab962e032 before c462e15497dc40abe369b3be7a2c91ac5d1be6f9; from b7fb4d78a6ade6026d9e5cf438c2a46ab962e032 before b5f92cc4e24a298bf390b0b189a4b888c0900161; from b7fb4d78a6ade6026d9e5cf438c2a46ab962e032 before 6ad6954492697681ebcfc1beb0eb384406cd4b65; from b7fb4d78a6ade6026d9e5cf438c2a46ab962e032 before eadd0c2c76aee6a738f17f251434c77db3c606c8; from b7fb4d78a6ade6026d9e5cf438c2a46ab962e032 before d5b2752a17efc165793ae38f2c24b5ed9c04ffde; from b7fb4d78a6ade6026d9e5cf438c2a46ab962e032 before 81bbcff0c053c4f5c711c31a9b72fc492bd96c3f; 3ca8a07f141fd8eec347a82bdfa4b94164f2bb97; and 4 more ranges	CNA record

References

References

https://git.kernel.org/stable/c/606cc45e871e34b80a2f63874f069387a5b44176
https://git.kernel.org/stable/c/c462e15497dc40abe369b3be7a2c91ac5d1be6f9
https://git.kernel.org/stable/c/b5f92cc4e24a298bf390b0b189a4b888c0900161
https://git.kernel.org/stable/c/6ad6954492697681ebcfc1beb0eb384406cd4b65
https://git.kernel.org/stable/c/eadd0c2c76aee6a738f17f251434c77db3c606c8
https://git.kernel.org/stable/c/d5b2752a17efc165793ae38f2c24b5ed9c04ffde
https://git.kernel.org/stable/c/81bbcff0c053c4f5c711c31a9b72fc492bd96c3f

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.