CVE-2021-47480
scsi: core: Put LLD module refcnt after SCSI device is released
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Not listed in CISA KEV
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
CISA's decision points: whether it is exploited, whether attacks can be automated, and how much control an attacker gets. Assessed (SSVC 2.0.3).What do these mean? →
- Exploitation: none
- Automatable: no
- Technical impact: partial
Summary
In the Linux kernel, the following vulnerability has been resolved: scsi: core: Put LLD module refcnt after SCSI device is released SCSI host release is triggered when SCSI device is freed. We have to make sure that the low-level device driver module won't be unloaded before SCSI host instance is released because shost->hostt is required in the release handler. Make sure to put LLD module refcnt after SCSI device is released. Fixes a kernel panic of 'BUG: unable to handle page fault for address' reported by Changhui and Yi.
Timeline
- CVE published
- CISA SSVC assessment
Exploitation: none · Automatable: no · Technical impact: partial
- Record last updated
Affected versions
- Linux Linux
Version range not reported
- Linux Linux
2.6.16
References 8
git.kernel.org
- stable/c/1105573d964f7b78734348466b01f5f6ba8a1813
- stable/c/8e4814a461787e15a31d322d9efbe0d4f6822428
- stable/c/61a0faa89f21861d1f8d059123b5c285a5d9ffee
- stable/c/c2df161f69fb1c67f63adbd193368b47f511edc0
- stable/c/1ce287eff9f23181d5644db787f472463a61f68b
- stable/c/7b57c38d12aed1b5d92f74748bed25e0d041729f
- stable/c/f30822c0b4c35ec86187ab055263943dc71a6836
- stable/c/f2b85040acec9a928b4eb1b57a989324e8e38d3f