s390/sclp: Fix SCCB present check

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2025-39694
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2025-09-05 18:15:46 UTC
Updated2026-05-12 13:17:05 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: s390/sclp: Fix SCCB present check Tracing code called by the SCLP interrupt handler contains early exits if the SCCB address associated with an interrupt is NULL. This check is performed after physical to virtual address translation. If the kernel identity mapping does not start at address zero, the resulting virtual address is never zero, so that the NULL checks won't work. Subsequently this may result in incorrect accesses to the first page of the identity mapping. Fix this by introducing a function that handles the NULL case before address translation.

Risk And Classification

Primary CVSS: v3.1 5.5 MEDIUM from [email protected]

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

Problem Types: CWE-476

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

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

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Linux Linux Kernel All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected ada1da31ce34248bc97ca8f801f2cf6efa378a81 aa5073ac1a2a274812f3b04c278992e68ff67cc7 git Not specified
CNA Linux Linux affected ada1da31ce34248bc97ca8f801f2cf6efa378a81 86c2825791c3836a8f77a954b9c5ebe6fab410c5 git Not specified
CNA Linux Linux affected ada1da31ce34248bc97ca8f801f2cf6efa378a81 61605c847599fbfdfafe638607841c7d73719081 git Not specified
CNA Linux Linux affected ada1da31ce34248bc97ca8f801f2cf6efa378a81 bf83ae3537359af088d6577812ed93113dfbcb7b git Not specified
CNA Linux Linux affected ada1da31ce34248bc97ca8f801f2cf6efa378a81 430fa71027b6ac9bb0ce5532b8d0676777d4219a git Not specified
CNA Linux Linux affected 5.16 Not specified
CNA Linux Linux unaffected 5.16 semver Not specified
CNA Linux Linux unaffected 6.1.149 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.103 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.44 6.12.* semver Not specified
CNA Linux Linux unaffected 6.16.4 6.16.* semver Not specified
CNA Linux Linux unaffected 6.17 * original_commit_for_fix Not specified
ADP Siemens SIMATIC CN 4100 affected V5.0 custom Not specified

References

ReferenceSourceLinkTags
lists.debian.org/debian-lts-announce/2025/10/msg00008.html af854a3a-2127-422b-91ae-364da2661108 lists.debian.org Third Party Advisory
git.kernel.org/stable/c/aa5073ac1a2a274812f3b04c278992e68ff67cc7 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/61605c847599fbfdfafe638607841c7d73719081 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/430fa71027b6ac9bb0ce5532b8d0676777d4219a 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
cert-portal.siemens.com/productcert/html/ssa-032379.html 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e cert-portal.siemens.com
git.kernel.org/stable/c/bf83ae3537359af088d6577812ed93113dfbcb7b 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/86c2825791c3836a8f77a954b9c5ebe6fab410c5 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
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