# CVE-2026-72013: linux: In the Linux kernel, the following vulnerability has been resolved:  riscv: Prevent NULL pointer dereference in machi...

CVE-2026-72013 is fixed in linux on 1 platform, first by DEBIAN-CVE-2026-72013, released August 15, 2026. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2026-72013
- Priority: Routine
- CVSS: n/a
- EPSS: 0.0022
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Aug 15, 2026

## 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.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 12.15 (bookworm) | 6.1.180-1 | [DEBIAN-CVE-2026-72013](https://patchblox.com/security/data/fix/linux/debian-cve-2026-72013.md) | Aug 15, 2026 |
| Linux | linux Debian 13.5 (trixie) | 6.12.100-1 | [DEBIAN-CVE-2026-72013](https://patchblox.com/security/data/fix/linux/debian-cve-2026-72013.md) | Aug 15, 2026 |
| Linux | linux Debian 14 | 7.1.5-1 | [DEBIAN-CVE-2026-72013](https://patchblox.com/security/data/fix/linux/debian-cve-2026-72013.md) | Aug 15, 2026 |

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Data as of 2026-11-08T06:59:42Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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