CVE-2025-39694

Advisory lineage Upstream: 0 Downstream: 39
Modified
Published: 05 Sept 2025, 17:21
Last modified:12 May 2026, 12:06

Vulnerability Summary

Overall Risk (default)
low
22/100
CVSS Score
5.5 MEDIUM
v3.1 (nvd)
EPSS Score
0.03% LOW
0% probability 0.00%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

05 Sept 2025, 17:21
Published
Vulnerability first disclosed
12 May 2026, 12:06
Last Modified
Vulnerability information updated

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.

CVSS Metrics

  • v3.1•MEDIUM•Score: 5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

EPSS Trends

Current EPSS score: 0.03%• Percentile: 8%

Techniques & Countermeasures

  • CWE-476•NULL Pointer Dereference

    The product dereferences a pointer that it expects to be valid but is NULL.

Affected Systems

  • debian•debian_linux

    11.0

  • linux•linux

    ≥ ada1da31ce34248bc97ca8f801f2cf6efa378a81, < aa5073ac1a2a274812f3b04c278992e68ff67cc7 | ≥ ada1da31ce34248bc97ca8f801f2cf6efa378a81, < 86c2825791c3836a8f77a954b9c5ebe6fab410c5 | ≥ ada1da31ce34248bc97ca8f801f2cf6efa378a81, < 61605c847599fbfdfafe638607841c7d73719081 | ≥ ada1da31ce34248bc97ca8f801f2cf6efa378a81, < bf83ae3537359af088d6577812ed93113dfbcb7b | ≥ ada1da31ce34248bc97ca8f801f2cf6efa378a81, < 430fa71027b6ac9bb0ce5532b8d0676777d4219a | 5.16

  • linux•linux_kernel

    ≥ 5.16, < 6.1.149 | ≥ 6.2, < 6.6.103 | ≥ 6.7, < 6.12.44 | ≥ 6.13, < 6.16.4 | 6.17:rc1 | 6.17:rc2

References (7)