{"id":"CVE-2021-47480","state":"PUBLISHED","title":"scsi: core: Put LLD module refcnt after SCSI device is released","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nscsi: core: Put LLD module refcnt after SCSI device is released\n\nSCSI host release is triggered when SCSI device is freed. We have to make\nsure that the low-level device driver module won't be unloaded before SCSI\nhost instance is released because shost->hostt is required in the release\nhandler.\n\nMake sure to put LLD module refcnt after SCSI device is released.\n\nFixes a kernel panic of 'BUG: unable to handle page fault for address'\nreported by Changhui and Yi.","publishedAt":"2024-05-22T08:19:32.839Z","updatedAt":"2026-05-11T13:55:30.128Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"65110b2168950a19cc78b5027ed18cb811fbdae8","status":"affected","lessThan":"1105573d964f7b78734348466b01f5f6ba8a1813","versionType":"git"},{"version":"65110b2168950a19cc78b5027ed18cb811fbdae8","status":"affected","lessThan":"8e4814a461787e15a31d322d9efbe0d4f6822428","versionType":"git"},{"version":"65110b2168950a19cc78b5027ed18cb811fbdae8","status":"affected","lessThan":"61a0faa89f21861d1f8d059123b5c285a5d9ffee","versionType":"git"},{"version":"65110b2168950a19cc78b5027ed18cb811fbdae8","status":"affected","lessThan":"c2df161f69fb1c67f63adbd193368b47f511edc0","versionType":"git"},{"version":"65110b2168950a19cc78b5027ed18cb811fbdae8","status":"affected","lessThan":"1ce287eff9f23181d5644db787f472463a61f68b","versionType":"git"},{"version":"65110b2168950a19cc78b5027ed18cb811fbdae8","status":"affected","lessThan":"7b57c38d12aed1b5d92f74748bed25e0d041729f","versionType":"git"},{"version":"65110b2168950a19cc78b5027ed18cb811fbdae8","status":"affected","lessThan":"f30822c0b4c35ec86187ab055263943dc71a6836","versionType":"git"},{"version":"65110b2168950a19cc78b5027ed18cb811fbdae8","status":"affected","lessThan":"f2b85040acec9a928b4eb1b57a989324e8e38d3f","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/scsi/scsi.c","drivers/scsi/scsi_sysfs.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"2.6.16","status":"affected"},{"version":"0","status":"unaffected","lessThan":"2.6.16","versionType":"semver"},{"version":"4.4.292","status":"unaffected","lessThanOrEqual":"4.4.*","versionType":"semver"},{"version":"4.9.290","status":"unaffected","lessThanOrEqual":"4.9.*","versionType":"semver"},{"version":"4.14.255","status":"unaffected","lessThanOrEqual":"4.14.*","versionType":"semver"},{"version":"4.19.216","status":"unaffected","lessThanOrEqual":"4.19.*","versionType":"semver"},{"version":"5.4.158","status":"unaffected","lessThanOrEqual":"5.4.*","versionType":"semver"},{"version":"5.10.78","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.14.17","status":"unaffected","lessThanOrEqual":"5.14.*","versionType":"semver"},{"version":"5.15","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/scsi/scsi.c","drivers/scsi/scsi_sysfs.c"]}],"references":["https://git.kernel.org/stable/c/1105573d964f7b78734348466b01f5f6ba8a1813","https://git.kernel.org/stable/c/8e4814a461787e15a31d322d9efbe0d4f6822428","https://git.kernel.org/stable/c/61a0faa89f21861d1f8d059123b5c285a5d9ffee","https://git.kernel.org/stable/c/c2df161f69fb1c67f63adbd193368b47f511edc0","https://git.kernel.org/stable/c/1ce287eff9f23181d5644db787f472463a61f68b","https://git.kernel.org/stable/c/7b57c38d12aed1b5d92f74748bed25e0d041729f","https://git.kernel.org/stable/c/f30822c0b4c35ec86187ab055263943dc71a6836","https://git.kernel.org/stable/c/f2b85040acec9a928b4eb1b57a989324e8e38d3f"],"weaknesses":[],"ingestedAt":"2026-10-29T19:49:19.404Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2021/47xxx/CVE-2021-47480.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2021-47480","state":"PUBLISHED","datePublished":"2024-05-22T08:19:32.839Z","dateUpdated":"2026-05-11T13:55:30.128Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2024-05-22T06:20:56.200Z"},"containers":{"cna":{"title":"scsi: core: Put LLD module refcnt after SCSI device is released","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nscsi: core: Put LLD module refcnt after SCSI device is released\n\nSCSI host release is triggered when SCSI device is freed. We have to make\nsure that the low-level device driver module won't be unloaded before SCSI\nhost instance is released because shost->hostt is required in the release\nhandler.\n\nMake sure to put LLD module refcnt after SCSI device is released.\n\nFixes a kernel panic of 'BUG: unable to handle page fault for address'\nreported by Changhui and Yi."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"65110b2168950a19cc78b5027ed18cb811fbdae8","status":"affected","lessThan":"1105573d964f7b78734348466b01f5f6ba8a1813","versionType":"git"},{"version":"65110b2168950a19cc78b5027ed18cb811fbdae8","status":"affected","lessThan":"8e4814a461787e15a31d322d9efbe0d4f6822428","versionType":"git"},{"version":"65110b2168950a19cc78b5027ed18cb811fbdae8","status":"affected","lessThan":"61a0faa89f21861d1f8d059123b5c285a5d9ffee","versionType":"git"},{"version":"65110b2168950a19cc78b5027ed18cb811fbdae8","status":"affected","lessThan":"c2df161f69fb1c67f63adbd193368b47f511edc0","versionType":"git"},{"version":"65110b2168950a19cc78b5027ed18cb811fbdae8","status":"affected","lessThan":"1ce287eff9f23181d5644db787f472463a61f68b","versionType":"git"},{"version":"65110b2168950a19cc78b5027ed18cb811fbdae8","status":"affected","lessThan":"7b57c38d12aed1b5d92f74748bed25e0d041729f","versionType":"git"},{"version":"65110b2168950a19cc78b5027ed18cb811fbdae8","status":"affected","lessThan":"f30822c0b4c35ec86187ab055263943dc71a6836","versionType":"git"},{"version":"65110b2168950a19cc78b5027ed18cb811fbdae8","status":"affected","lessThan":"f2b85040acec9a928b4eb1b57a989324e8e38d3f","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/scsi/scsi.c","drivers/scsi/scsi_sysfs.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"2.6.16","status":"affected"},{"version":"0","status":"unaffected","lessThan":"2.6.16","versionType":"semver"},{"version":"4.4.292","status":"unaffected","lessThanOrEqual":"4.4.*","versionType":"semver"},{"version":"4.9.290","status":"unaffected","lessThanOrEqual":"4.9.*","versionType":"semver"},{"version":"4.14.255","status":"unaffected","lessThanOrEqual":"4.14.*","versionType":"semver"},{"version":"4.19.216","status":"unaffected","lessThanOrEqual":"4.19.*","versionType":"semver"},{"version":"5.4.158","status":"unaffected","lessThanOrEqual":"5.4.*","versionType":"semver"},{"version":"5.10.78","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.14.17","status":"unaffected","lessThanOrEqual":"5.14.*","versionType":"semver"},{"version":"5.15","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/scsi/scsi.c","drivers/scsi/scsi_sysfs.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/1105573d964f7b78734348466b01f5f6ba8a1813"},{"url":"https://git.kernel.org/stable/c/8e4814a461787e15a31d322d9efbe0d4f6822428"},{"url":"https://git.kernel.org/stable/c/61a0faa89f21861d1f8d059123b5c285a5d9ffee"},{"url":"https://git.kernel.org/stable/c/c2df161f69fb1c67f63adbd193368b47f511edc0"},{"url":"https://git.kernel.org/stable/c/1ce287eff9f23181d5644db787f472463a61f68b"},{"url":"https://git.kernel.org/stable/c/7b57c38d12aed1b5d92f74748bed25e0d041729f"},{"url":"https://git.kernel.org/stable/c/f30822c0b4c35ec86187ab055263943dc71a6836"},{"url":"https://git.kernel.org/stable/c/f2b85040acec9a928b4eb1b57a989324e8e38d3f"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-05-11T13:55:30.128Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.16","versionEndExcluding":"4.4.292"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.16","versionEndExcluding":"4.9.290"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.16","versionEndExcluding":"4.14.255"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.16","versionEndExcluding":"4.19.216"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.16","versionEndExcluding":"5.4.158"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.16","versionEndExcluding":"5.10.78"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.16","versionEndExcluding":"5.14.17"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.16","versionEndExcluding":"5.15"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"title":"CVE Program Container","references":[{"url":"https://git.kernel.org/stable/c/1105573d964f7b78734348466b01f5f6ba8a1813","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/8e4814a461787e15a31d322d9efbe0d4f6822428","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/61a0faa89f21861d1f8d059123b5c285a5d9ffee","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/c2df161f69fb1c67f63adbd193368b47f511edc0","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/1ce287eff9f23181d5644db787f472463a61f68b","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/7b57c38d12aed1b5d92f74748bed25e0d041729f","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/f30822c0b4c35ec86187ab055263943dc71a6836","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/f2b85040acec9a928b4eb1b57a989324e8e38d3f","tags":["x_transferred"]}],"providerMetadata":{"shortName":"CVE","orgId":"af854a3a-2127-422b-91ae-364da2661108","dateUpdated":"2024-08-04T05:39:59.500Z"}},{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"id":"CVE-2021-47480","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"version":"2.0.3","timestamp":"2024-09-10T15:36:02.036772Z"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2024-09-11T17:32:53.299Z"}}]}}}