CVE-2025-39694
Description
In 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.
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
OS impact
Linux kernel Affected 2 releases
| Version | Status | Fixed in |
|---|---|---|
| 6.17 | Affected | — |
| — | Affected | 6.1.149 |
SUSE Affected 1 release
| Version | Status | Fixed in |
|---|---|---|
| — | Affected | — |
Debian Mixed 6 releases
| Version | Status | Fixed in |
|---|---|---|
| trixie | Fixed | 6.12.48-1 |
| sid | Fixed | 6.16.5-1 |
| forky | Fixed | 6.16.5-1 |
| bullseye | Fixed | 0 |
| bookworm | Fixed | 6.1.153-1 |
| 11.0 | Affected | — |
AlmaLinux Fixed 1 release
| Version | Status | Fixed in |
|---|---|---|
| 9 | Fixed | kernel-debug-devel-5.14.0-570.46.1.el9_6.aarch64.rpm |
Red Hat Fixed 1 release
| Version | Status | Fixed in |
|---|---|---|
| 9 | Fixed | — |
References
- https://access.redhat.com/errata/RHSA-2025:16398
- https://git.kernel.org/stable/c/430fa71027b6ac9bb0ce5532b8d0676777d4219a
- https://git.kernel.org/stable/c/61605c847599fbfdfafe638607841c7d73719081
- https://git.kernel.org/stable/c/86c2825791c3836a8f77a954b9c5ebe6fab410c5
- https://git.kernel.org/stable/c/aa5073ac1a2a274812f3b04c278992e68ff67cc7
- https://git.kernel.org/stable/c/bf83ae3537359af088d6577812ed93113dfbcb7b
- https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html
- https://cert-portal.siemens.com/productcert/html/ssa-032379.html
- https://www.suse.com/security/cve/CVE-2025-39694.html
- https://security-tracker.debian.org/tracker/CVE-2025-39694
- https://bugzilla.redhat.com/2363686
- https://bugzilla.redhat.com/2365028
- https://bugzilla.redhat.com/2384422
- https://bugzilla.redhat.com/2393534
- https://errata.almalinux.org/9/ALSA-2025-16398.html
CWEs
CWE-476
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.