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CVE-2021-47177— iommu/vt-d: Fix sysfs leak in alloc_iommu()

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 iommu/vt-d 中的 alloc_iommu()存在安全问题。

AI Predicted 5.5 Difficulty: Moderate EPSS 0.24% · P14

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service

Affected Version Matrix 14

VendorProduct Version RangeStatus
Linux Linux 39ab9555c24110671f8dc671311a26e5c985b592< 22da9f4978381a99f1abaeaf6c9b83be6ab5ddd8 affected
39ab9555c24110671f8dc671311a26e5c985b592< 2ec5e9bb6b0560c90d315559c28a99723c80b996 affected
39ab9555c24110671f8dc671311a26e5c985b592< 044bbe8b92ab4e542de7f6c93c88ea65cccd8e29 affected
39ab9555c24110671f8dc671311a26e5c985b592< f01134321d04f47c718bb41b799bcdeda27873d2 affected
39ab9555c24110671f8dc671311a26e5c985b592< ca466561eef36d1ec657673e3944eb6340bddb5b affected
39ab9555c24110671f8dc671311a26e5c985b592< 0ee74d5a48635c848c20f152d0d488bf84641304 affected
4.11 affected
< 4.11 unaffected
… +6 more rows
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I. Basic Information for CVE-2021-47177

Vulnerability Information
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Vulnerability Title
iommu/vt-d: Fix sysfs leak in alloc_iommu()
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: iommu/vt-d: Fix sysfs leak in alloc_iommu() iommu_device_sysfs_add() is called before, so is has to be cleaned on subsequent errors.
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 iommu/vt-d 中的 alloc_iommu()存在安全问题。
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 39ab9555c24110671f8dc671311a26e5c985b592 ~ 22da9f4978381a99f1abaeaf6c9b83be6ab5ddd8 -
Linux Linux 4.11 -

II. Public POCs for CVE-2021-47177

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III. Intelligence Information for CVE-2021-47177

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Other References for CVE-2021-47177 (6)

Same Patch Batch · Linux · 2024-03-25 · 40 CVEs total

CVE-2021-47137 9.8 CRITICAL net: lantiq: fix memory corruption in RX ring
CVE-2021-47168 9.8 CRITICAL NFS: fix an incorrect limit in filelayout_decode_layout()
CVE-2021-47162 9.8 CRITICAL tipc: skb_linearize the head skb when reassembling msgs
CVE-2021-47136 8.6 HIGH net: zero-initialize tc skb extension on allocation
CVE-2021-47160 8.1 HIGH net: dsa: mt7530: fix VLAN traffic leaks
CVE-2021-47142 7.8 HIGH drm/amdgpu: Fix a use-after-free
CVE-2021-47175 7.8 HIGH net/sched: fq_pie: fix OOB access in the traffic path
CVE-2021-47163 7.8 HIGH tipc: wait and exit until all work queues are done
CVE-2021-47159 7.8 HIGH net: dsa: fix a crash if ->get_sset_count() fails
CVE-2021-47158 7.8 HIGH net: dsa: sja1105: add error handling in sja1105_setup()
CVE-2021-47153 7.8 HIGH i2c: i801: Don't generate an interrupt on bus reset
CVE-2021-47152 7.8 HIGH mptcp: fix data stream corruption
CVE-2021-47148 7.8 HIGH octeontx2-pf: fix a buffer overflow in otx2_set_rxfh_context()
CVE-2021-47179 7.5 HIGH NFSv4: Fix a NULL pointer dereference in pnfs_mark_matching_lsegs_return()
CVE-2021-47178 7.5 HIGH scsi: target: core: Avoid smp_processor_id() in preemptible code
CVE-2021-47166 NFS: Don't corrupt the value of pg_bytes_written in nfs_do_recoalesce()
CVE-2021-47180 NFC: nci: fix memory leak in nci_allocate_device
CVE-2021-47176 s390/dasd: add missing discipline function
CVE-2021-47141 gve: Add NULL pointer checks when freeing irqs.
CVE-2021-47174 netfilter: nft_set_pipapo_avx2: Add irq_fpu_usable() check, fallback to non-AVX2 version

Showing top 20 of 40 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2021-47177

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