PT-2021-3669 · Linux+9 · Linux Kernel+9
Lin Horse
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Published
2021-07-18
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Updated
2024-06-15
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CVE-2021-3640
CVSS v3.1
7.0
High
| Vector | AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H |
Name of the Vulnerable Software and Affected Versions
Linux kernel (affected versions not specified)
Description
The issue is related to a use-after-free flaw in the sco sock sendmsg() function of the Linux kernel's HCI subsystem. This flaw can be triggered by a privileged local user through specific system calls, such as ioct UFFDIO REGISTER, which can cause a race condition with the sco conn del() and sco sock sendmsg() calls. This can lead to a controllable faulting memory page. The exploitation of this issue may result in a system crash or allow an attacker to escalate their privileges on the system.
Recommendations
At the moment, there is no information about a newer version that contains a fix for this vulnerability.
Exploit
Race Condition
Use After Free
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Related Identifiers
Affected Products
Alt Linux
Almalinux
Astra Linux
Centos
Linuxmint
Linux Kernel
Red Hat
Rocky Linux
Suse
Ubuntu