CVE-2021-47186

2024-04-1000:00:00

ubuntu.com

linux kernel

vulnerability

cve-2021-47186

kmemdup

null check

tipc_crypto_key_xmit

CVSS3

7.5

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

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

AI Score

6.6

Confidence

High

EPSS

Percentile

15.5%

JSON

In the Linux kernel, the following vulnerability has been resolved: tipc:
check for null after calling kmemdup kmemdup can return a null pointer so
need to check for it, otherwise the null key will be dereferenced later in
tipc_crypto_key_xmit as can be seen in the trace [1]. [1]
https://syzkaller.appspot.com/bug?id=bca180abb29567b189efdbdb34cbf7ba851c2a58

OSVersionArchitecturePackageVersionFilename
ubuntu20.04noarchlinux< anyUNKNOWN
ubuntu20.04noarchlinux-aws< anyUNKNOWN
ubuntu20.04noarchlinux-azure< anyUNKNOWN
ubuntu20.04noarchlinux-bluefield< anyUNKNOWN
ubuntu20.04noarchlinux-gcp< anyUNKNOWN
ubuntu20.04noarchlinux-gkeop< anyUNKNOWN
ubuntu20.04noarchlinux-ibm< anyUNKNOWN
ubuntu20.04noarchlinux-iot< anyUNKNOWN
ubuntu20.04noarchlinux-kvm< anyUNKNOWN
ubuntu20.04noarchlinux-oracle< anyUNKNOWN

OS	Version	Architecture	Package	Version	Filename
ubuntu	20.04	noarch	linux	< any	UNKNOWN
ubuntu	20.04	noarch	linux-aws	< any	UNKNOWN
ubuntu	20.04	noarch	linux-azure	< any	UNKNOWN
ubuntu	20.04	noarch	linux-bluefield	< any	UNKNOWN
ubuntu	20.04	noarch	linux-gcp	< any	UNKNOWN
ubuntu	20.04	noarch	linux-gkeop	< any	UNKNOWN
ubuntu	20.04	noarch	linux-ibm	< any	UNKNOWN
ubuntu	20.04	noarch	linux-iot	< any	UNKNOWN
ubuntu	20.04	noarch	linux-kvm	< any	UNKNOWN
ubuntu	20.04	noarch	linux-oracle	< any	UNKNOWN