{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2025-68368","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2025-12-16T14:48:05.309Z","datePublished":"2025-12-24T10:32:54.765Z","dateUpdated":"2026-05-11T21:51:51.317Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-05-11T21:51:51.317Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nmd: init bioset in mddev_init\n\nIO operations may be needed before md_run(), such as updating metadata\nafter writing sysfs. Without bioset, this triggers a NULL pointer\ndereference as below:\n\n BUG: kernel NULL pointer dereference, address: 0000000000000020\n Call Trace:\n  md_update_sb+0x658/0xe00\n  new_level_store+0xc5/0x120\n  md_attr_store+0xc9/0x1e0\n  sysfs_kf_write+0x6f/0xa0\n  kernfs_fop_write_iter+0x141/0x2a0\n  vfs_write+0x1fc/0x5a0\n  ksys_write+0x79/0x180\n  __x64_sys_write+0x1d/0x30\n  x64_sys_call+0x2818/0x2880\n  do_syscall_64+0xa9/0x580\n  entry_SYSCALL_64_after_hwframe+0x4b/0x53\n\nReproducer\n```\n  mdadm -CR /dev/md0 -l1 -n2 /dev/sd[cd]\n  echo inactive > /sys/block/md0/md/array_state\n  echo 10 > /sys/block/md0/md/new_level\n```\n\nmddev_init() can only be called once per mddev, no need to test if bioset\nhas been initialized anymore."}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/md/md.c"],"versions":[{"version":"d981ed8419303ed12351eea8541ad6cb76455fe3","lessThan":"9d37fe37dfa0833a8768740f0575e0ffd793cb4a","status":"affected","versionType":"git"},{"version":"d981ed8419303ed12351eea8541ad6cb76455fe3","lessThan":"381a3ce1c0ffed647c9b913e142b099c7e9d5afc","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/md/md.c"],"versions":[{"version":"6.12","status":"affected"},{"version":"0","lessThan":"6.12","status":"unaffected","versionType":"semver"},{"version":"6.18.2","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"6.19","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.12","versionEndExcluding":"6.18.2"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.12","versionEndExcluding":"6.19"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/9d37fe37dfa0833a8768740f0575e0ffd793cb4a"},{"url":"https://git.kernel.org/stable/c/381a3ce1c0ffed647c9b913e142b099c7e9d5afc"}],"title":"md: init bioset in mddev_init","x_generator":{"engine":"bippy-1.2.0"}}}}