CVE-2021-47005 - Vulnerability Details

Vendors	Products
Linux	Linux Kernel

Link	Providers
https://git.kernel.org/stable/c/0169d4f0bee44fdfef908c13ed21fcb326c38695
https://git.kernel.org/stable/c/6613bc2301ba291a1c5a90e1dc24cf3edf223c03
https://git.kernel.org/stable/c/679ebad058b8168f10e63876d63b0877fd2fe784
https://git.kernel.org/stable/c/bbed83d7060e07a5d309104d25a00f0a24441428
https://lore.kernel.org/linux-cve-announce/2024022829-CVE-2021-47005-8f88@gregkh/T/#u
https://nvd.nist.gov/vuln/detail/CVE-2021-47005
https://www.cve.org/CVERecord?id=CVE-2021-47005

Type	Values Removed	Values Added
First Time appeared		Linux Linux linux Kernel
CPEs		cpe:2.3:o:linux:linux_kernel::::::::
Vendors & Products		Linux Linux linux Kernel
Metrics	cvssV3_1 `{'score': 4.4, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H'}`	cvssV3_1 `{'score': 5.5, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'}`

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

Show plain JSON

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Show plain JSON

{"bugzilla": {"description": "kernel: PCI: endpoint: Fix NULL pointer dereference for -&gt;get_features()", "id": "2266861", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2266861"}, "csaw": false, "cvss3": {"cvss3_base_score": "4.4", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-476", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nPCI: endpoint: Fix NULL pointer dereference for ->get_features()\nget_features ops of pci_epc_ops may return NULL, causing NULL pointer\ndereference in pci_epf_test_alloc_space function. Let us add a check for\npci_epc_feature pointer in pci_epf_test_bind before we access it to avoid\nany such NULL pointer dereference and return -ENOTSUPP in case\npci_epc_feature is not found.\nWhen the patch is not applied and EPC features is not implemented in the\nplatform driver, we see the following dump due to kernel NULL pointer\ndereference.\nCall trace:\npci_epf_test_bind+0xf4/0x388\npci_epf_bind+0x3c/0x80\npci_epc_epf_link+0xa8/0xcc\nconfigfs_symlink+0x1a4/0x48c\nvfs_symlink+0x104/0x184\ndo_symlinkat+0x80/0xd4\n__arm64_sys_symlinkat+0x1c/0x24\nel0_svc_common.constprop.3+0xb8/0x170\nel0_svc_handler+0x70/0x88\nel0_svc+0x8/0x640\nCode: d2800581 b9403ab9 f9404ebb 8b394f60 (f9400400)\n---[ end trace a438e3c5a24f9df0 ]---"], "name": "CVE-2021-47005", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2024-02-28T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2021-47005\nhttps://nvd.nist.gov/vuln/detail/CVE-2021-47005\nhttps://lore.kernel.org/linux-cve-announce/2024022829-CVE-2021-47005-8f88@gregkh/T/#u"], "threat_severity": "Low"}

{

bugzilla : { »

description : kernel: PCI: endpoint: Fix NULL pointer dereference for ->get_features() (string)

id : 2266861 (string)

url : https://bugzilla.redhat.com/show_bug.cgi?id=2266861 (string)

}

csaw : false (boolean)

cvss3 : { »

cvss3_base_score : 4.4 (string)

cvss3_scoring_vector : CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H (string)

status : draft (string)

}

cwe : CWE-476 (string)

details : [ »

0 : In the Linux kernel, the following vulnerability has been resolved: PCI: endpoint: Fix NULL pointer dereference for ->get_features() get_features ops of pci_epc_ops may return NULL, causing NULL pointer dereference in pci_epf_test_alloc_space function. Let us add a check for pci_epc_feature pointer in pci_epf_test_bind before we access it to avoid any such NULL pointer dereference and return -ENOTSUPP in case pci_epc_feature is not found. When the patch is not applied and EPC features is not implemented in the platform driver, we see the following dump due to kernel NULL pointer dereference. Call trace: pci_epf_test_bind+0xf4/0x388 pci_epf_bind+0x3c/0x80 pci_epc_epf_link+0xa8/0xcc configfs_symlink+0x1a4/0x48c vfs_symlink+0x104/0x184 do_symlinkat+0x80/0xd4 __arm64_sys_symlinkat+0x1c/0x24 el0_svc_common.constprop.3+0xb8/0x170 el0_svc_handler+0x70/0x88 el0_svc+0x8/0x640 Code: d2800581 b9403ab9 f9404ebb 8b394f60 (f9400400) ---[ end trace a438e3c5a24f9df0 ]--- (string)

]

name : CVE-2021-47005 (string)

package_state : [ »

0 : { »

cpe : cpe:/o:redhat:enterprise_linux:6 (string)

fix_state : Out of support scope (string)

package_name : kernel (string)

product_name : Red Hat Enterprise Linux 6 (string)

}

1 : { »

cpe : cpe:/o:redhat:enterprise_linux:7 (string)

fix_state : Out of support scope (string)

package_name : kernel (string)

product_name : Red Hat Enterprise Linux 7 (string)

}

2 : { »

cpe : cpe:/o:redhat:enterprise_linux:7 (string)

fix_state : Out of support scope (string)

package_name : kernel-rt (string)

product_name : Red Hat Enterprise Linux 7 (string)

}

3 : { »

cpe : cpe:/o:redhat:enterprise_linux:8 (string)

fix_state : Not affected (string)

package_name : kernel (string)

product_name : Red Hat Enterprise Linux 8 (string)

}

4 : { »

cpe : cpe:/o:redhat:enterprise_linux:8 (string)

fix_state : Not affected (string)

package_name : kernel-rt (string)

product_name : Red Hat Enterprise Linux 8 (string)

}

5 : { »

cpe : cpe:/o:redhat:enterprise_linux:9 (string)

fix_state : Not affected (string)

package_name : kernel (string)

product_name : Red Hat Enterprise Linux 9 (string)

}

6 : { »

cpe : cpe:/o:redhat:enterprise_linux:9 (string)

fix_state : Not affected (string)

package_name : kernel-rt (string)

product_name : Red Hat Enterprise Linux 9 (string)

}

]

public_date : 2024-02-28T00:00:00Z (string)

references : [ »

0 : https://www.cve.org/CVERecord?id=CVE-2021-47005 https://nvd.nist.gov/vuln/detail/CVE-2021-47005 https://lore.kernel.org/linux-cve-announce/2024022829-CVE-2021-47005-8f88@gregkh/T/#u (string)

]

threat_severity : Low (string)

}

Metrics

Attack Vector Local

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact High

User Interaction None

Exploitation none

Automatable no

Technical Impact partial

Affected Vendors & Products

Metrics

Attack Vector Local

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact High

User Interaction None

Exploitation none

Automatable no

Technical Impact partial

Affected Vendors & Products

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