Medium severity · published Mar 10, 2021
CVE-2021-20265
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
5.5
CVSS
0.3%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 27% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
KE
Kernel · Linux
All versions, or not specified · source: NVD
TP
Tekelec Platform Distribution · Oracle
7.4.0 through 7.7.1 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-20265
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-20265
Issue Tracking
https://bugzilla.redhat.com/show_bug.cgi?id=1908827
Patch
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=fa0dc04df259ba2df3ce1920e9690c7842f8fa4b
Patch
https://www.oracle.com/security-alerts/cpuoct2021.html
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