01 Record

CVE-2026-31669

mptcp: fix slab-use-after-free in __inet_lookup_established

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

mptcp: fix slab-use-after-free in __inet_lookup_established

03 Exploitation and scoring

Exploitation: Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
SSVC decision: Not assessed by CISA
EPSS probability: 0.46% probability of exploitation activity in the next 30 days.
EPSS percentile: Ranks above 37.8% of scored records. A rank, not a probability.
NVD base score: 9.8 (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:H/I:H/A:H
NVD analysis status: Modified. NVD last modified this record on 2026-07-14.
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

2026-04-24 14:45Z4 MO AGO

Last updated

2026-08-05 12:24Z1 MO AGO

Reserved

2026-03-09

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
CWE-763Release of Invalid Pointer or ReferenceBase

Data version

5.2

Document digest

d965458c1cf858932a1380df1ef0cc1b11b76511e3b057847fd2d41099f17dfa

05 Affected products

VendorProductVersionsPlatforms

LinuxLinuxb19bc2945b40b9fd38e835700907ffe8534ef0de to < f6e1f25fa5e733570f6d6fe37a4dfed2a0deba47, b19bc2945b40b9fd38e835700907ffe8534ef0de to < fb1f54b7d16f393b8b65d328410f78b4beea8fcc, b19bc2945b40b9fd38e835700907ffe8534ef0de to < 3fd6547f5b8ac99687be6d937a0321efda760597, b19bc2945b40b9fd38e835700907ffe8534ef0de to < eb9c6aeb512f877cf397deb1e4526f646c70e4a7, b19bc2945b40b9fd38e835700907ffe8534ef0de to < 15fa9ead4d5e6b6b9c794e84144146c917f2cb62, b19bc2945b40b9fd38e835700907ffe8534ef0de to < b313e9037d98c13938740e5ebda7852929366dff, b19bc2945b40b9fd38e835700907ffe8534ef0de to < 9b55b253907e7431210483519c5ad711a37dafa1, 5.12—

06 References

git.kernel.orghttps://git.kernel.org/stable/c/f6e1f25fa5e733570f6d6fe37a4dfed2a0deba47
git.kernel.orghttps://git.kernel.org/stable/c/fb1f54b7d16f393b8b65d328410f78b4beea8fcc
git.kernel.orghttps://git.kernel.org/stable/c/3fd6547f5b8ac99687be6d937a0321efda760597
git.kernel.orghttps://git.kernel.org/stable/c/eb9c6aeb512f877cf397deb1e4526f646c70e4a7
git.kernel.orghttps://git.kernel.org/stable/c/15fa9ead4d5e6b6b9c794e84144146c917f2cb62
git.kernel.orghttps://git.kernel.org/stable/c/b313e9037d98c13938740e5ebda7852929366dff
git.kernel.orghttps://git.kernel.org/stable/c/9b55b253907e7431210483519c5ad711a37dafa1
cert-portal.siemens.comhttps://cert-portal.siemens.com/productcert/html/ssa-082556.html
cert-portal.siemens.comhttps://cert-portal.siemens.com/productcert/html/ssa-019113.html

01 Record index

CVE-2026-31669

02 Description

03 Exploitation and scoring

04 Metadata

05 Affected products

06 References

02 Records

CVE-2026-31669

02 Description

03 Exploitation and scoring

04 Metadata

05 Affected products

06 References