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Vulnerability Intelligence

Vulnerability IntelligenceCVE-2021-20265

CVE-2021-20265

MEDIUM5.5

A flaw was found in the way memory resources were freed in the unix_stream_recvmsg function in the Linux kernel when a signal was pending

Published Mar 10, 2021

Modified 1 years ago

Details

A flaw was found in the way memory resources were freed in the unix_stream_recvmsg function in the Linux kernel when a signal was pending. This flaw allows an unprivileged local user to crash the system by exhausting available memory. The highest threat from this vulnerability is to system availability.

References

https://bugzilla.redhat.com/show_bug.cgi?id=1908827

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=fa0dc04df259ba2df3ce1920e9690c7842f8fa4b

https://www.cve.org/CVERecord?id=CVE-2021-20265

https://www.oracle.com/security-alerts/cpuoct2021.html

CVSS Analysis

CVSS v3.1

5.5

Exploitability

Attack Vector

LocalAV:L

Attack Complexity

LowAC:L

Privileges Required

LowPR:L

User Interaction

NoneUI:N

Scope

Scope

UnchangedS:U

Impact

Confidentiality

NoneC:N

Integrity

NoneI:N

Availability

HighA:H

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

Weakness Type (CWE)

Resource Management

Resource Exhaustion

Ecosystems

Timeline

PublishedMar 10, 2021

ModifiedAug 3, 2024

CVE-2021-20265 | Mondoo Vulnerability Intelligence