01 Record

CVE-2025-71126

mptcp: avoid deadlock on fallback while reinjecting

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

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02 Description

mptcp: avoid deadlock on fallback while reinjecting

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

0.26% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 18.2% of scored records. A rank, not a probability.

NVD base score

5.5 (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:N/I:N/A:H

NVD analysis status

Modified. 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

2026-01-14 15:06Z9 MO AGO

Last updated

2026-10-19 18:15Z9 DAYS AGO

Reserved

2026-01-13

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-362Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')Class
CWE-667Improper LockingClass
CWE-833DeadlockBase

Data version

5.2

Document digest

df5a2f02e4be9a8774fec6c5fbf9af28b6b65288ee6c6e0fab95a65164494f38

05 Affected products

VendorProductVersionsPlatforms

LinuxLinux5586518bec27666c747cd52aabb62d485686d0bf to < 0107442e82c0f8d6010e07e6030741c59c520d6e, 75a4c9ab8a7af0d76b31ccd1188ed178c38b35d2 to < 252892d5a6a2f163ce18f32716e46fa4da7d4e79, 54999dea879fecb761225e28f274b40662918c30 to < 0ca9fb4335e726dab4f23b3bfe87271d8f005f41, f8a1d9b18c5efc76784f5a326e905f641f839894 to < 50f47c02be419bf0a3ae94c118addf67beef359f, f8a1d9b18c5efc76784f5a326e905f641f839894 to < ffb8c27b0539dd90262d1021488e7817fae57c42, 1d82a8fe6ee4afdc92f4e8808c9dad2a6095bbc5, 6.1.149 to < 6.1.160, 6.6.101 to < 6.6.120, 6.12.40 to < 6.12.64, 6.15.8 to < 6.16, 6.16—

06 References

git.kernel.orghttps://git.kernel.org/stable/c/0107442e82c0f8d6010e07e6030741c59c520d6e
git.kernel.orghttps://git.kernel.org/stable/c/252892d5a6a2f163ce18f32716e46fa4da7d4e79
git.kernel.orghttps://git.kernel.org/stable/c/0ca9fb4335e726dab4f23b3bfe87271d8f005f41
git.kernel.orghttps://git.kernel.org/stable/c/50f47c02be419bf0a3ae94c118addf67beef359f
git.kernel.orghttps://git.kernel.org/stable/c/ffb8c27b0539dd90262d1021488e7817fae57c42

07 Fixed in

Debian 12

linux
Fixed in 6.1.162-1

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

Debian 13

linux
Fixed in 6.12.69-1

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

Debian 14

linux
Fixed in 6.18.3-1

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