01 Record

CVE-2026-68453

s390/zcrypt: Fix buffer over-read in cca_cipher2protkey

HighPUBLISHEDCNA: Linux

CNA base score7.1 CVSS v3.xCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

View raw JSON

02 Description

s390/zcrypt: Fix buffer over-read in cca_cipher2protkey

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 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

0.16% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 5.3% of scored records. A rank, not a probability.

NVD base score

7.1 (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:H/I:N/A:H

NVD analysis status

Received. NVD last modified this record on 2026-10-21.

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

2026-08-13 13:59Z2 MO AGO

Last updated

2026-10-21 12:44Z8 DAYS AGO

Reserved

2026-07-30

Assigning CNA

Linux

Record state

PUBLISHED

Severity

High (CVSS 7.1)

CNA CVSS vector

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

Weaknesses

CWE-125Out-of-bounds ReadBase

Data version

5.2

Document digest

c427b2edca58ffb0ae08a495d6b536b568d8f8aa84fccce32531b4d9b62090f1

05 Affected products

VendorProductVersionsPlatforms

LinuxLinux4bc123b18ce6ae6c42c69d0456b5acbd2f7bc8bd to < d0951ed366710a1a303b7cb2f8eb3d866cd68fc6, 4bc123b18ce6ae6c42c69d0456b5acbd2f7bc8bd to < 353e442d18084b24fb3ede4e5adfca26b25f0e89, 4bc123b18ce6ae6c42c69d0456b5acbd2f7bc8bd to < a57fd7fcdb63e2d5ceac78bbe825ec986062a9da, 4bc123b18ce6ae6c42c69d0456b5acbd2f7bc8bd to < 3b2abee2a678607ae27975bc6833785c2002df43, 4bc123b18ce6ae6c42c69d0456b5acbd2f7bc8bd to < 36b230835b8a008266aad22168ca52afacc8a58d, 5.4—

06 References

git.kernel.orghttps://git.kernel.org/stable/c/d0951ed366710a1a303b7cb2f8eb3d866cd68fc6
git.kernel.orghttps://git.kernel.org/stable/c/353e442d18084b24fb3ede4e5adfca26b25f0e89
git.kernel.orghttps://git.kernel.org/stable/c/a57fd7fcdb63e2d5ceac78bbe825ec986062a9da
git.kernel.orghttps://git.kernel.org/stable/c/3b2abee2a678607ae27975bc6833785c2002df43
git.kernel.orghttps://git.kernel.org/stable/c/36b230835b8a008266aad22168ca52afacc8a58d

07 Fixed in

Debian 12

linux
No fix yet

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

Debian 13

linux
No fix yet

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

Debian 14

linux
Fixed in 7.1.8-1

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