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CVE-2021-3772A 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…
- 6.5MediumCVSS base score
- 1.2%Exploitation in 30 daysEPSS · top 30% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
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.
Timeline
ID reserved
By redhat
- 6 months later
· 6 months later
Published
- 2 years later
· 2 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 3.1 | Medium6.5 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H |
- EPSS (exploitation in 30 days)
- 1.2% · top 30% of all CVEs (14 Nov 2026)
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 6.5.
Affected products
kernel
- affected Fixed in linux kernel v5.15 and above
References
References8
- https://bugzilla.redhat.com/show_bug.cgi?id=2000694 (opens in a new tab)x_transferred
- https://ubuntu.com/security/CVE-2021-3772 (opens in a new tab)x_transferred
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=32f8807a48ae55be0e76880cfe8607a18b5bb0df (opens in a new tab)x_transferred
- https://github.com/torvalds/linux/commit/32f8807a48ae55be0e76880cfe8607a18b5bb0df (opens in a new tab)x_transferred
- [debian-lts-announce] 20220309 [SECURITY] [DLA 2941-1] linux-4.19 security update (opens in a new tab)mailing-listx_transferred
- DSA-5096 (opens in a new tab)vendor-advisoryx_transferred
- https://www.oracle.com/security-alerts/cpujul2022.html (opens in a new tab)x_transferred
- https://security.netapp.com/advisory/ntap-20221007-0001/ (opens in a new tab)x_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2021-27041 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2021-3772)Record last updated .