CVE-2026-72013

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

No CVSS.

References

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

Configurations

No configuration.

History

No history.

Information

Published : 2026-08-15 06:21

Updated : 2026-08-17 06:17

NVD link : CVE-2026-72013

Mitre link : CVE-2026-72013

CVE.ORG link : CVE-2026-72013

JSON object : View

Products Affected

No product.

CWE

No CWE.

{"id": "CVE-2026-72013", "cveTags": [], "metrics": {}, "affected": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "affectedData": [{"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"}]}], "published": "2026-08-15T06:21:00.033", "references": [{"url": "https://git.kernel.org/stable/c/606cc45e871e34b80a2f63874f069387a5b44176", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/6ad6954492697681ebcfc1beb0eb384406cd4b65", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/81bbcff0c053c4f5c711c31a9b72fc492bd96c3f", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/b5f92cc4e24a298bf390b0b189a4b888c0900161", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/c462e15497dc40abe369b3be7a2c91ac5d1be6f9", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/d5b2752a17efc165793ae38f2c24b5ed9c04ffde", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/eadd0c2c76aee6a738f17f251434c77db3c606c8", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "vulnStatus": "Received", "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nriscv: Prevent NULL pointer dereference in machine_kexec_prepare()\n\nA NULL pointer dereference issue is noticed in riscv's\nmachine_kexec_prepare(), where image->segment[i].buf might be NULL and\ncopied unchecked.\n\nThe NULL buf comes from ima_add_kexec_buffer(), where kbuf is added by\nkexec_add_buffer(), but kbuf.buffer is NULL, then it is copied without\na check in machine_kexec_prepare():\n\n kexec_file_load\n -> kimage_file_alloc_init()\n -> kimage_file_prepare_segments()\n -> ima_add_kexec_buffer()\n -> kexec_add_buffer()\n -> machine_kexec_prepare()\n -> memcpy()\n\nAddress this by adding a check before the data copy attempt."}], "lastModified": "2026-08-17T06:17:58.763", "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}