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

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于无法处理地址的页面错误，从而导致内核恐慌。

AI Predicted 7.8 Difficulty: Moderate EPSS 0.21% · P11

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux 65110b2168950a19cc78b5027ed18cb811fbdae8< 1105573d964f7b78734348466b01f5f6ba8a1813 affected
65110b2168950a19cc78b5027ed18cb811fbdae8< 8e4814a461787e15a31d322d9efbe0d4f6822428 affected
65110b2168950a19cc78b5027ed18cb811fbdae8< 61a0faa89f21861d1f8d059123b5c285a5d9ffee affected
65110b2168950a19cc78b5027ed18cb811fbdae8< c2df161f69fb1c67f63adbd193368b47f511edc0 affected
65110b2168950a19cc78b5027ed18cb811fbdae8< 1ce287eff9f23181d5644db787f472463a61f68b affected
65110b2168950a19cc78b5027ed18cb811fbdae8< 7b57c38d12aed1b5d92f74748bed25e0d041729f affected
65110b2168950a19cc78b5027ed18cb811fbdae8< f30822c0b4c35ec86187ab055263943dc71a6836 affected
65110b2168950a19cc78b5027ed18cb811fbdae8< f2b85040acec9a928b4eb1b57a989324e8e38d3f affected
… +10 more rows
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I. Basic Information for CVE-2021-47480

Vulnerability Information
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Vulnerability Title
scsi: core: Put LLD module refcnt after SCSI device is released
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于无法处理地址的页面错误，从而导致内核恐慌。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux 65110b2168950a19cc78b5027ed18cb811fbdae8 ~ 1105573d964f7b78734348466b01f5f6ba8a1813 -
Linux Linux 2.6.16 -

II. Public POCs for CVE-2021-47480

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III. Intelligence Information for CVE-2021-47480

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Other References for CVE-2021-47480 (8)

Same Patch Batch · Linux · 2024-05-22 · 63 CVEs total

CVE-2021-47496 9.8 CRITICAL net/tls: Fix flipped sign in tls_err_abort() calls
CVE-2021-47478 9.1 CRITICAL isofs: Fix out of bound access for corrupted isofs image
CVE-2021-47450 8.8 HIGH KVM: arm64: Fix host stage-2 PGD refcount
CVE-2021-47433 8.1 HIGH btrfs: fix abort logic in btrfs_replace_file_extents
CVE-2021-47451 7.8 HIGH netfilter: xt_IDLETIMER: fix panic that occurs when timer_type has garbage value
CVE-2021-47447 7.8 HIGH drm/msm/a3xx: fix error handling in a3xx_gpu_init()
CVE-2021-47446 7.8 HIGH drm/msm/a4xx: fix error handling in a4xx_gpu_init()
CVE-2021-47492 7.8 HIGH mm, thp: bail out early in collapse_file for writeback page
CVE-2021-47493 7.8 HIGH ocfs2: fix race between searching chunks and release journal_head from buffer_head
CVE-2021-47494 7.8 HIGH cfg80211: fix management registrations locking
CVE-2021-47461 7.8 HIGH userfaultfd: fix a race between writeprotect and exit_mmap()
CVE-2021-47485 7.8 HIGH IB/qib: Protect from buffer overflow in struct qib_user_sdma_pkt fields
CVE-2021-47483 7.8 HIGH regmap: Fix possible double-free in regcache_rbtree_exit()
CVE-2021-47459 7.8 HIGH can: j1939: j1939_netdev_start(): fix UAF for rx_kref of j1939_priv
CVE-2021-47448 7.5 HIGH mptcp: fix possible stall on recvmsg()
CVE-2021-47458 7.1 HIGH ocfs2: mount fails with buffer overflow in strlen
CVE-2021-47465 7.1 HIGH KVM: PPC: Book3S HV: Fix stack handling in idle_kvm_start_guest()
CVE-2021-47438 7.1 HIGH net/mlx5e: Fix memory leak in mlx5_core_destroy_cq() error path
CVE-2021-47473 scsi: qla2xxx: Fix a memory leak in an error path of qla2x00_process_els()
CVE-2021-47474 comedi: vmk80xx: fix bulk-buffer overflow

Showing top 20 of 63 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2021-47480

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