01 Record

CVE-2021-46999

sctp: do asoc update earlier in sctp_sf_do_dupcook_a

CriticalPUBLISHEDCNA: Linux

CNA base score9.8 CVSS v3.xCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

View raw JSON

02 Description

sctp: do asoc update earlier in sctp_sf_do_dupcook_a

03 Exploitation and scoring

Exploitation

Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.

SSVC decision

ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

0.74% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 51.9% of scored records. A rank, not a probability.

NVD base score

7.8 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

NVD analysis status

Modified. NVD last modified this record on 2026-08-04.

Red Hat severity

Moderate. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published

2024-02-28 08:13Z2 YR AGO

Last updated

2026-08-05 08:45Z1 MO AGO

Reserved

2024-02-27

Assigning CNA

Linux

Record state

PUBLISHED

Severity

Critical (CVSS 9.8)

CNA CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weaknesses

CWE-416Use After FreeVariant

Data version

5.2

Document digest

c67ec9ffde5f1c83bee136fa5b78e774621d4e68065c4c08071ac29077e93ce6

05 Affected products

VendorProductVersionsPlatforms

LinuxLinuxdb8bf823e70f239372c62f13e4eb6f08a1665e8c to < d624f2991b977821375fbd56c91b0c91d456a697, a204d577be70e0a0a6023cf1b9859c9ebffaeecd to < b1b31948c0af44628e43353828453461bb74098f, 145cb2f7177d94bc54563ed26027e952ee0ae03c to < f01988ecf3654f805282dce2d3bb9afe68d2691e, 145cb2f7177d94bc54563ed26027e952ee0ae03c to < 61b877bad9bb0d82b7d8841be50872557090a704, 145cb2f7177d94bc54563ed26027e952ee0ae03c to < 0bfd913c2121b3d553bfd52810fe6061d542d625, 145cb2f7177d94bc54563ed26027e952ee0ae03c to < 35b4f24415c854cd718ccdf38dbea6297f010aae, a5ce8531ea508d270822b2bc6140c6198c8a2a7b, 4.19.123 to < 4.19.191, 5.4.41 to < 5.4.120, 5.6.13 to < 5.7, 5.7—

06 References

git.kernel.orghttps://git.kernel.org/stable/c/d624f2991b977821375fbd56c91b0c91d456a697
git.kernel.orghttps://git.kernel.org/stable/c/b1b31948c0af44628e43353828453461bb74098f
git.kernel.orghttps://git.kernel.org/stable/c/f01988ecf3654f805282dce2d3bb9afe68d2691e
git.kernel.orghttps://git.kernel.org/stable/c/61b877bad9bb0d82b7d8841be50872557090a704
git.kernel.orghttps://git.kernel.org/stable/c/0bfd913c2121b3d553bfd52810fe6061d542d625
git.kernel.orghttps://git.kernel.org/stable/c/35b4f24415c854cd718ccdf38dbea6297f010aae

01 Record index

CVE-2021-46999

02 Description

03 Exploitation and scoring

04 Metadata

05 Affected products

06 References

02 Records

CVE-2021-46999

02 Description

03 Exploitation and scoring

04 Metadata

05 Affected products

06 References