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Vulnerability · Published May 22, 2024 · Assigned by Linux

CVE-2021-47480scsi: core: Put LLD module refcnt after SCSI device is released

Medium 5.5

In plain English

A medium-severity security flaw in Linux from Linux. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 11% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS NVD)5.5Medium
Exploit odds (30 days)0.2%top 88.7% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

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.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12linux5.15.3-1DEBIAN-CVE-2021-47480
Debian:13linux5.15.3-1DEBIAN-CVE-2021-47480
Debian:14linux5.15.3-1DEBIAN-CVE-2021-47480
Ubuntu:22.04:LTSlinux-allwinner-5.19no fix listedUBUNTU-CVE-2021-47480
Ubuntu:22.04:LTSlinux-aws-5.19no fix listedUBUNTU-CVE-2021-47480
Ubuntu:22.04:LTSlinux-aws-6.2no fix listedUBUNTU-CVE-2021-47480
Ubuntu:22.04:LTSlinux-azure-5.19no fix listedUBUNTU-CVE-2021-47480
Ubuntu:22.04:LTSlinux-azure-6.2no fix listedUBUNTU-CVE-2021-47480
Ubuntu:22.04:LTSlinux-azure-fde-5.19no fix listedUBUNTU-CVE-2021-47480
Ubuntu:22.04:LTSlinux-azure-fde-6.2no fix listedUBUNTU-CVE-2021-47480
Ubuntu:22.04:LTSlinux-gcp-5.19no fix listedUBUNTU-CVE-2021-47480
Ubuntu:22.04:LTSlinux-gcp-6.2no fix listedUBUNTU-CVE-2021-47480
Ubuntu:22.04:LTSlinux-hwe-5.19no fix listedUBUNTU-CVE-2021-47480
Ubuntu:22.04:LTSlinux-hwe-6.2no fix listedUBUNTU-CVE-2021-47480
Ubuntu:22.04:LTSlinux-intel-iot-realtimeno fix listedUBUNTU-CVE-2021-47480
Ubuntu:22.04:LTSlinux-lowlatency-hwe-5.19no fix listedUBUNTU-CVE-2021-47480
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.2no fix listedUBUNTU-CVE-2021-47480
Ubuntu:22.04:LTSlinux-nvidia-6.2no fix listedUBUNTU-CVE-2021-47480
Ubuntu:22.04:LTSlinux-oem-5.17no fix listedUBUNTU-CVE-2021-47480
Ubuntu:22.04:LTSlinux-oem-6.0no fix listedUBUNTU-CVE-2021-47480
Ubuntu:22.04:LTSlinux-oem-6.1no fix listedUBUNTU-CVE-2021-47480
Ubuntu:24.04:LTSlinux-raspi-realtimeno fix listedUBUNTU-CVE-2021-47480
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2021-47480
Ubuntu:22.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2021-47480
Ubuntu:22.04:LTSlinux-riscv-5.19no fix listedUBUNTU-CVE-2021-47480
Ubuntu:22.04:LTSlinux-starfive-5.19no fix listedUBUNTU-CVE-2021-47480
Ubuntu:22.04:LTSlinux-starfive-6.2no fix listedUBUNTU-CVE-2021-47480

Affected products (as reported)

VendorProductVersions
Linux Linux 65110b2168950a19cc78b5027ed18cb811fbdae8 – before 1105573d964f7b78734348466b01f5f6ba8a181365110b2168950a19cc78b5027ed18cb811fbdae8 – before 8e4814a461787e15a31d322d9efbe0d4f682242865110b2168950a19cc78b5027ed18cb811fbdae8 – before 61a0faa89f21861d1f8d059123b5c285a5d9ffee65110b2168950a19cc78b5027ed18cb811fbdae8 – before c2df161f69fb1c67f63adbd193368b47f511edc065110b2168950a19cc78b5027ed18cb811fbdae8 – before 1ce287eff9f23181d5644db787f472463a61f68b65110b2168950a19cc78b5027ed18cb811fbdae8 – before 7b57c38d12aed1b5d92f74748bed25e0d041729f65110b2168950a19cc78b5027ed18cb811fbdae8 – before f30822c0b4c35ec86187ab055263943dc71a683665110b2168950a19cc78b5027ed18cb811fbdae8 – before f2b85040acec9a928b4eb1b57a989324e8e38d3f
Linux Linux 2.6.16

References