01 Record

CVE-2026-89477

sctp: fix NULL deref on untransmitted RECONF completion

HighPUBLISHEDCNA: Linux

CNA base score7.5 CVSS v3.xCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

View raw JSON

02 Description

sctp: fix NULL deref on untransmitted RECONF completion

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.
AutomatableyesAn attacker can reliably automate reconnaissance through exploitation, so this scales.
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

0.50% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 42.6% of scored records. A rank, not a probability.

NVD base score

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

NVD CVSS vector

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

NVD analysis status

Received. NVD last modified this record on 2026-10-19.

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

2026-09-11 19:43Z1 MO AGO

Last updated

2026-10-19 08:47Z10 DAYS AGO

Reserved

2026-09-11

Assigning CNA

Linux

Record state

PUBLISHED

Severity

High (CVSS 7.5)

CNA CVSS vector

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

Weaknesses

CWE-476NULL Pointer DereferenceBase

Data version

5.2

Document digest

7d28e949a8d8a8ac85bdc29ebcb100c692448c5862eb139a2fca1b377bc0caf0

05 Affected products

VendorProductVersionsPlatforms

LinuxLinux81054476453640159149cb6704e834893e16736b to < 79ff751311e80fa0370007e46a79a6d601685e75, 81054476453640159149cb6704e834893e16736b to < 53141db979687eae7dc6d29414cefc77034f967e, 81054476453640159149cb6704e834893e16736b to < 68891125af5a5dfbca728809a16637a869bbe0df, 81054476453640159149cb6704e834893e16736b to < b2d6d873b4dfb5b84194061c4b40a1cd85b92ca4, 81054476453640159149cb6704e834893e16736b to < 77ea60f2d24002c308f224db44a4542c466489af, 81054476453640159149cb6704e834893e16736b to < 25419f516ea84b1e7d3d55aae5215ac86ece0c66, 81054476453640159149cb6704e834893e16736b to < 0ee697defc0594f1da810ed75d9d643fb46f5318, 81054476453640159149cb6704e834893e16736b to < 2db9bfa3e27bdea15e05ea70b56bad3d21e570ec, 4.11—

06 References

git.kernel.orghttps://git.kernel.org/stable/c/79ff751311e80fa0370007e46a79a6d601685e75
git.kernel.orghttps://git.kernel.org/stable/c/53141db979687eae7dc6d29414cefc77034f967e
git.kernel.orghttps://git.kernel.org/stable/c/68891125af5a5dfbca728809a16637a869bbe0df
git.kernel.orghttps://git.kernel.org/stable/c/b2d6d873b4dfb5b84194061c4b40a1cd85b92ca4
git.kernel.orghttps://git.kernel.org/stable/c/77ea60f2d24002c308f224db44a4542c466489af
git.kernel.orghttps://git.kernel.org/stable/c/25419f516ea84b1e7d3d55aae5215ac86ece0c66
git.kernel.orghttps://git.kernel.org/stable/c/0ee697defc0594f1da810ed75d9d643fb46f5318
git.kernel.orghttps://git.kernel.org/stable/c/2db9bfa3e27bdea15e05ea70b56bad3d21e570ec

07 Fixed in

Debian 12

linux
Fixed in 6.1.190-1
linux-6.12
Fixed in 6.12.111-1~deb12u1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 13

linux
Fixed in 6.12.111-1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 14

linux
Fixed in 7.2.6-1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.