01 Record

CVE-2025-21938

mptcp: fix 'scheduling while atomic' in mptcp_pm_nl_append_new_local_addr

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

mptcp: fix 'scheduling while atomic' in mptcp_pm_nl_append_new_local_addr

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

0.39% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 33.2% of scored records. A rank, not a probability.

NVD base score

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

NVD CVSS vector

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

NVD analysis status

Modified. NVD last modified this record on 2026-10-15.

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

2025-04-01 15:41Z1 YR AGO

Last updated

2026-10-15 21:51Z13 DAYS AGO

Reserved

2024-12-29

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

Data version

5.2

Document digest

885388acd24f354d5274ca020b4cc80d6058ce165c1db944242ee4645de22720

05 Affected products

VendorProductVersionsPlatforms

LinuxLinuxd045b9eb95a9b611c483897a69e7285aefdc66d7 to < f1404f368c40fc6a068dad72e4ee0824ee6a78ee, d045b9eb95a9b611c483897a69e7285aefdc66d7 to < f3fcdb2de9fdbed9d8c6a8eb2c5fbd7d6f54a4d8, d045b9eb95a9b611c483897a69e7285aefdc66d7 to < 4b228dae3d2cc6d9dce167449cd8fa9f028e9376, d045b9eb95a9b611c483897a69e7285aefdc66d7 to < 125ccafe6dd062901b5a0c31ee9038740fc8859e, d045b9eb95a9b611c483897a69e7285aefdc66d7 to < 022bfe24aad8937705704ff2e414b100cf0f2e1a, 5.18—

06 References

git.kernel.orghttps://git.kernel.org/stable/c/f1404f368c40fc6a068dad72e4ee0824ee6a78ee
git.kernel.orghttps://git.kernel.org/stable/c/f3fcdb2de9fdbed9d8c6a8eb2c5fbd7d6f54a4d8
git.kernel.orghttps://git.kernel.org/stable/c/4b228dae3d2cc6d9dce167449cd8fa9f028e9376
git.kernel.orghttps://git.kernel.org/stable/c/125ccafe6dd062901b5a0c31ee9038740fc8859e
git.kernel.orghttps://git.kernel.org/stable/c/022bfe24aad8937705704ff2e414b100cf0f2e1a
lists.debian.orghttps://lists.debian.org/debian-lts-announce/2025/05/msg00045.html
cert-portal.siemens.comhttps://cert-portal.siemens.com/productcert/html/ssa-019113.html
cert-portal.siemens.comhttps://cert-portal.siemens.com/productcert/html/ssa-457936.html

07 Fixed in

Debian 12

linux
Fixed in 6.1.133-1

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

Debian 13

linux
Fixed in 6.12.19-1

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

Debian 14

linux
Fixed in 6.12.19-1

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