CVE-2026-72013riscv: Prevent NULL pointer dereference in machine_kexec_prepare()
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No exploitation reported and no EPSS estimate yet.
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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
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
- 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.