{"id":"CVE-2026-72013","state":"PUBLISHED","title":"riscv: Prevent NULL pointer dereference in machine_kexec_prepare()","description":"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.","publishedAt":"2026-08-15T05:51:41.982Z","updatedAt":"2026-08-17T05:06:35.378Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"4211742f0f9e083188f4f0ada00d6eeeef31b7c7","status":"affected","lessThan":"606cc45e871e34b80a2f63874f069387a5b44176","versionType":"git"},{"version":"b7fb4d78a6ade6026d9e5cf438c2a46ab962e032","status":"affected","lessThan":"c462e15497dc40abe369b3be7a2c91ac5d1be6f9","versionType":"git"},{"version":"b7fb4d78a6ade6026d9e5cf438c2a46ab962e032","status":"affected","lessThan":"b5f92cc4e24a298bf390b0b189a4b888c0900161","versionType":"git"},{"version":"b7fb4d78a6ade6026d9e5cf438c2a46ab962e032","status":"affected","lessThan":"6ad6954492697681ebcfc1beb0eb384406cd4b65","versionType":"git"},{"version":"b7fb4d78a6ade6026d9e5cf438c2a46ab962e032","status":"affected","lessThan":"eadd0c2c76aee6a738f17f251434c77db3c606c8","versionType":"git"},{"version":"b7fb4d78a6ade6026d9e5cf438c2a46ab962e032","status":"affected","lessThan":"d5b2752a17efc165793ae38f2c24b5ed9c04ffde","versionType":"git"},{"version":"b7fb4d78a6ade6026d9e5cf438c2a46ab962e032","status":"affected","lessThan":"81bbcff0c053c4f5c711c31a9b72fc492bd96c3f","versionType":"git"},{"version":"3ca8a07f141fd8eec347a82bdfa4b94164f2bb97","status":"affected","versionType":"git"},{"version":"3ba83e46b591381e718007f55c9f831fd0cd7ee8","status":"affected","versionType":"git"},{"version":"5.15.47","status":"affected","lessThan":"5.15.212","versionType":"semver"},{"version":"5.17.15","status":"affected","lessThan":"5.18","versionType":"semver"},{"version":"5.18.4","status":"affected","lessThan":"5.19","versionType":"semver"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["arch/riscv/kernel/machine_kexec.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.19","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.19","versionType":"semver"},{"version":"5.15.212","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.178","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.145","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.97","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.40","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.1.5","status":"unaffected","lessThanOrEqual":"7.1.*","versionType":"semver"},{"version":"7.2","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["arch/riscv/kernel/machine_kexec.c"]}],"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"],"weaknesses":[],"ingestedAt":"2026-10-29T20:12:58.252Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/72xxx/CVE-2026-72013.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-72013","state":"PUBLISHED","datePublished":"2026-08-15T05:51:41.982Z","dateUpdated":"2026-08-17T05:06:35.378Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-08-09T03:40:39.899Z"},"containers":{"cna":{"title":"riscv: Prevent NULL pointer dereference in machine_kexec_prepare()","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."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"4211742f0f9e083188f4f0ada00d6eeeef31b7c7","status":"affected","lessThan":"606cc45e871e34b80a2f63874f069387a5b44176","versionType":"git"},{"version":"b7fb4d78a6ade6026d9e5cf438c2a46ab962e032","status":"affected","lessThan":"c462e15497dc40abe369b3be7a2c91ac5d1be6f9","versionType":"git"},{"version":"b7fb4d78a6ade6026d9e5cf438c2a46ab962e032","status":"affected","lessThan":"b5f92cc4e24a298bf390b0b189a4b888c0900161","versionType":"git"},{"version":"b7fb4d78a6ade6026d9e5cf438c2a46ab962e032","status":"affected","lessThan":"6ad6954492697681ebcfc1beb0eb384406cd4b65","versionType":"git"},{"version":"b7fb4d78a6ade6026d9e5cf438c2a46ab962e032","status":"affected","lessThan":"eadd0c2c76aee6a738f17f251434c77db3c606c8","versionType":"git"},{"version":"b7fb4d78a6ade6026d9e5cf438c2a46ab962e032","status":"affected","lessThan":"d5b2752a17efc165793ae38f2c24b5ed9c04ffde","versionType":"git"},{"version":"b7fb4d78a6ade6026d9e5cf438c2a46ab962e032","status":"affected","lessThan":"81bbcff0c053c4f5c711c31a9b72fc492bd96c3f","versionType":"git"},{"version":"3ca8a07f141fd8eec347a82bdfa4b94164f2bb97","status":"affected","versionType":"git"},{"version":"3ba83e46b591381e718007f55c9f831fd0cd7ee8","status":"affected","versionType":"git"},{"version":"5.15.47","status":"affected","lessThan":"5.15.212","versionType":"semver"},{"version":"5.17.15","status":"affected","lessThan":"5.18","versionType":"semver"},{"version":"5.18.4","status":"affected","lessThan":"5.19","versionType":"semver"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["arch/riscv/kernel/machine_kexec.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.19","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.19","versionType":"semver"},{"version":"5.15.212","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.178","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.145","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.97","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.40","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.1.5","status":"unaffected","lessThanOrEqual":"7.1.*","versionType":"semver"},{"version":"7.2","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["arch/riscv/kernel/machine_kexec.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/606cc45e871e34b80a2f63874f069387a5b44176"},{"url":"https://git.kernel.org/stable/c/c462e15497dc40abe369b3be7a2c91ac5d1be6f9"},{"url":"https://git.kernel.org/stable/c/b5f92cc4e24a298bf390b0b189a4b888c0900161"},{"url":"https://git.kernel.org/stable/c/6ad6954492697681ebcfc1beb0eb384406cd4b65"},{"url":"https://git.kernel.org/stable/c/eadd0c2c76aee6a738f17f251434c77db3c606c8"},{"url":"https://git.kernel.org/stable/c/d5b2752a17efc165793ae38f2c24b5ed9c04ffde"},{"url":"https://git.kernel.org/stable/c/81bbcff0c053c4f5c711c31a9b72fc492bd96c3f"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-08-17T05:06:35.378Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.15.47","versionEndExcluding":"5.15.212"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.19","versionEndExcluding":"6.1.178"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.19","versionEndExcluding":"6.6.145"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.19","versionEndExcluding":"6.12.97"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.19","versionEndExcluding":"6.18.40"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.19","versionEndExcluding":"7.1.5"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.19","versionEndExcluding":"7.2"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.17.15"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.18.4"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}