01 Record

CVE-2025-40253

s390/ctcm: Fix double-kfree

HighPUBLISHEDCNA: Linux

CNA base score8.8 CVSS v3.xCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

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02 Description

s390/ctcm: Fix double-kfree

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 ImpacttotalSuccessful exploitation gives total 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

0.30% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 22.4% of scored records. A rank, not a probability.

NVD base score

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

NVD CVSS vector

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

NVD analysis status

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

Red Hat severity

Low. 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: 2025-12-04 16:08Z10 MO AGO
Last updated: 2026-10-15 22:02Z13 DAYS AGO
Reserved: 2025-04-16
Assigning CNA: Linux
Record state: PUBLISHED
Severity: High (CVSS 8.8)
CNA CVSS vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weaknesses: No CWE assigned
Data version: 5.2
Document digest: 37778753c4be4962e2bb3cca64ebc247142b6387fb57e1a4fa7f848aea51079a

05 Affected products

VendorProductVersionsPlatforms

LinuxLinux467ddbbe7e749d558f13e640f50f546149c930b3 to < 06f1dd1de0d33dbfbd2e1fc9fc57d8895f730de2, 4d3c6d741816539b57fa1110c3f765a8c176d7b4 to < 6bf8ccaabce8cebb6cb1f255c93d0acdfe95c17a, 2bd57101c3ecf3f8c0da1d26c2b6ad511adc6d50 to < 7616e2eee679746d526c7f5befd4eedb995935b5, 0c0b20587b9f25a2ad14db7f80ebe49bdf29920a to < 43096dab8cc60fc39133205fd149a54d3acebea8, 0c0b20587b9f25a2ad14db7f80ebe49bdf29920a to < 3b177b2ded563df16f6d5920671ffcfe5915d472, 0c0b20587b9f25a2ad14db7f80ebe49bdf29920a to < b9dbfb1b5699f9f1e4991f96741bdf9047147589, 0c0b20587b9f25a2ad14db7f80ebe49bdf29920a to < 7ff76f8dc6b550f8d16487bf3cebc278be720b5c, 0c0b20587b9f25a2ad14db7f80ebe49bdf29920a to < da02a1824884d6c84c5e5b5ac373b0c9e3288ec2, 36933de59f67029e5739a98393891f9b94f27e0f, d886b4292a1c5b4facdb2dfdc31f0fecc71df898, 4c9ba0fed125deba8416b995b0c274b0804c0c24, ea0053af5dab4d63a9c44563973fb2f3bfd9eb2b, 5.4.195 to < 5.4.302, 5.10.117 to < 5.10.247, 5.15.41 to < 5.15.197, 4.9.315 to < 4.10, 4.14.280 to < 4.15, 4.19.244 to < 4.20, 5.17.9 to < 5.18, 5.18—

06 References

git.kernel.orghttps://git.kernel.org/stable/c/06f1dd1de0d33dbfbd2e1fc9fc57d8895f730de2
git.kernel.orghttps://git.kernel.org/stable/c/6bf8ccaabce8cebb6cb1f255c93d0acdfe95c17a
git.kernel.orghttps://git.kernel.org/stable/c/7616e2eee679746d526c7f5befd4eedb995935b5
git.kernel.orghttps://git.kernel.org/stable/c/43096dab8cc60fc39133205fd149a54d3acebea8
git.kernel.orghttps://git.kernel.org/stable/c/3b177b2ded563df16f6d5920671ffcfe5915d472
git.kernel.orghttps://git.kernel.org/stable/c/b9dbfb1b5699f9f1e4991f96741bdf9047147589
git.kernel.orghttps://git.kernel.org/stable/c/7ff76f8dc6b550f8d16487bf3cebc278be720b5c
git.kernel.orghttps://git.kernel.org/stable/c/da02a1824884d6c84c5e5b5ac373b0c9e3288ec2

07 Fixed in

Debian 12

linux
Fixed in 6.1.159-1

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

Debian 13

linux
Fixed in 6.12.63-1

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

Debian 14

linux
Fixed in 6.17.10-1

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