HIGH
CVE-2021-27364
CWE-125Published: March 7, 2021· Updated: Jun 17, 2026
7.1
CVSS v3.1
Official 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.
Technical Analysis
CVE-2021-27364 requires local access, meaning attackers must already have a foothold on the target system.
Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.
A successful exploit results in complete confidentiality breach (data exposure), availability disruption (denial of service), with a CVSS base score of 7.1.
CVSS v3.1 Vector Breakdown
Exploitability
Attack VectorLocal
Attack ComplexityLow
Privileges Req.Low
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityNone
AvailabilityHigh
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
Affected Vendors & Products
Exploit & PoC Resources
NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.
Official Patches & Advisories
All References (18)
→
http://packetstormsecurity.com/files/162117/Kernel-Live-Patch-Security-Notice-LSN-0075-1.htmlThird Party Advisory · VDB Entry
→
https://blog.grimm-co.com/2021/03/new-old-bugs-in-linux-kernel.htmlExploit · Third Party Advisory
→
https://bugzilla.suse.com/show_bug.cgi?id=1182717Issue Tracking · Third Party Advisory
→
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=688e8128b7a92df982709a4137ea4588d16f24aaMailing List · Patch · Vendor Advisory
→
https://lists.debian.org/debian-lts-announce/2021/03/msg00010.htmlMailing List · Third Party Advisory
→
https://lists.debian.org/debian-lts-announce/2021/03/msg00035.htmlMailing List · Third Party Advisory
→
https://security.netapp.com/advisory/ntap-20210409-0001/Third Party Advisory
→
https://www.openwall.com/lists/oss-security/2021/03/06/1Mailing List · Third Party Advisory
→
https://www.oracle.com/security-alerts/cpuoct2021.htmlPatch · Third Party Advisory
→
http://packetstormsecurity.com/files/162117/Kernel-Live-Patch-Security-Notice-LSN-0075-1.htmlThird Party Advisory · VDB Entry
→
https://blog.grimm-co.com/2021/03/new-old-bugs-in-linux-kernel.htmlExploit · Third Party Advisory
→
https://bugzilla.suse.com/show_bug.cgi?id=1182717Issue Tracking · Third Party Advisory
→
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=688e8128b7a92df982709a4137ea4588d16f24aaMailing List · Patch · Vendor Advisory
→
https://lists.debian.org/debian-lts-announce/2021/03/msg00010.htmlMailing List · Third Party Advisory
→
https://lists.debian.org/debian-lts-announce/2021/03/msg00035.htmlMailing List · Third Party Advisory
Quick Facts
CVE IDCVE-2021-27364
CVSS Score7.1 / 10
SeverityHIGH
WeaknessCWE-125
CISA KEVNo
Affected5 vendor(s)
PublishedMar 7, 2021
Related CVEs (CWE-125)
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2021-27364 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWatch. CVE data is provided under the NVD usage policy.