High severity · published Mar 7, 2021
CVE-2021-27364
An issue was discovered in the Linux kernel through 5.11.3
7.1
CVSS
1%
EPSS
No
On KEV
Description
An issue was discovered in the Linux kernel through 5.11.3. drivers/scsi/scsi_transport_iscsi.c is adversely affected by the ability of an unprivileged user to craft Netlink messages.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.0% · higher than 62% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
KE
Kernel · Linux
before 4.4.260; 4.5 before 4.9.260; 4.10 before 4.14.224; 4.15 before 4.19.179; 4.20 before 5.4.103; 5.5 before 5.10.21; +1 more · source: NVD
CB
Cloud Backup · Netapp
All versions, or not specified · source: NVD
DL
Debian Linux · Debian
9.0 · source: NVD
SB
Solidfire Baseboard Management Controller Firmware · Netapp
All versions, or not specified · source: NVD
TP
Tekelec Platform Distribution · Oracle
7.4.0 through 7.7.1 · source: NVD
UL
Ubuntu Linux · Canonical
14.04; 16.04; 18.04; 20.04 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-27364
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-27364
Third Party Advisory
http://packetstormsecurity.com/files/162117/Kernel-Live-Patch-Security-Notice-LSN-0075-1.html
Exploit
https://blog.grimm-co.com/2021/03/new-old-bugs-in-linux-kernel.html
Issue Tracking
https://bugzilla.suse.com/show_bug.cgi?id=1182717
Mailing List
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=688e8128b7a92df982709a4137ea4588d16f24aa
Mailing List
https://lists.debian.org/debian-lts-announce/2021/03/msg00010.html
Mailing List
https://lists.debian.org/debian-lts-announce/2021/03/msg00035.html
More from Kernel
9.8
CVE-2025-39682
tls: fix handling of zero-length records on the rx_list
8.8
CVE-2026-53266
netfilter: bridge: make ebt_snat ARP rewrite writable
8.8
CVE-2013-6282
Linux Kernel Improper Input Validation Vulnerability
8.4
CVE-2022-0185
Linux Kernel Heap-Based Buffer Overflow Vulnerability
8.4
CVE-2013-2094
Linux Kernel Privilege Escalation Vulnerability