MEDIUM
CVE-2021-3772
CWE-354Published: March 2, 2022· Updated: Jun 17, 2026
6.5
CVSS v3.1
Official Description
A flaw was found in the Linux SCTP stack. A blind attacker may be able to kill an existing SCTP association through invalid chunks if the attacker knows the IP-addresses and port numbers being used and the attacker can send packets with spoofed IP addresses.
Technical Analysis
CVE-2021-3772 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.
The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.
A successful exploit results in availability disruption (denial of service), with a CVSS base score of 6.5.
CVSS v3.1 Vector Breakdown
Exploitability
Attack VectorNetwork
Attack ComplexityHigh
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityNone
IntegrityLow
AvailabilityHigh
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H
Affected Vendors & Products
Debian1 product(s)
debian linux
Linux1 product(s)
linux kernel
netapp20 product(s)
e-series santricity os controllersolidfire \& hci management nodesolidfire \& hci storage nodehci compute nodeh300s firmwareh300sh500s firmwareh500sh700s firmwareh700sh410s firmwareh410s+8
Oracle3 product(s)
communications cloud native core binding support functioncommunications cloud native core network exposure functioncommunications cloud native core policy
Red Hat1 product(s)
enterprise linux
Source: NVD CPE · 43 total CPE entries
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 (16)
→
https://bugzilla.redhat.com/show_bug.cgi?id=2000694Issue Tracking · Patch · Third Party Advisory
→
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=32f8807a48ae55be0e76880cfe8607a18b5bb0dfMailing List · Patch · Vendor Advisory
→
https://github.com/torvalds/linux/commit/32f8807a48ae55be0e76880cfe8607a18b5bb0dfPatch · Third Party Advisory
→
https://lists.debian.org/debian-lts-announce/2022/03/msg00012.htmlMailing List · Third Party Advisory
→
https://security.netapp.com/advisory/ntap-20221007-0001/Third Party Advisory
→
https://ubuntu.com/security/CVE-2021-3772Patch · Third Party Advisory
→
https://www.debian.org/security/2022/dsa-5096Third Party Advisory
→
https://www.oracle.com/security-alerts/cpujul2022.htmlPatch · Third Party Advisory
→
https://bugzilla.redhat.com/show_bug.cgi?id=2000694Issue Tracking · Patch · Third Party Advisory
→
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=32f8807a48ae55be0e76880cfe8607a18b5bb0dfMailing List · Patch · Vendor Advisory
→
https://github.com/torvalds/linux/commit/32f8807a48ae55be0e76880cfe8607a18b5bb0dfPatch · Third Party Advisory
→
https://lists.debian.org/debian-lts-announce/2022/03/msg00012.htmlMailing List · Third Party Advisory
→
https://security.netapp.com/advisory/ntap-20221007-0001/Third Party Advisory
→
https://ubuntu.com/security/CVE-2021-3772Patch · Third Party Advisory
→
https://www.debian.org/security/2022/dsa-5096Third Party Advisory
Quick Facts
CVE IDCVE-2021-3772
CVSS Score6.5 / 10
SeverityMEDIUM
WeaknessCWE-354
CISA KEVNo
Affected5 vendor(s)
PublishedMar 2, 2022
Related CVEs (CWE-354)
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2021-3772 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.