CVE-2026-98593: Linux kernel · s390/debug: Fix NULL pointer dereference in debug_info_copy()
Affects Linux kernelSource GCVE Database
Not known to be exploited.
Data as of 28 Oct 2026, 01:28 UTC
Rated by Threat Radar · CVSS not yet scored by NVD
Exploitation evidence
Disclosed: evidence found.
CVE published 18 Oct 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.
What to do
Affected software
| Product | Affected | Fixed in |
|---|---|---|
Ubuntu 26.04 LTSlinuxpkg:deb/ubuntu/linux?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Ubuntu 26.04 LTSlinux-awspkg:deb/ubuntu/linux-aws?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Ubuntu 26.04 LTSlinux-azurepkg:deb/ubuntu/linux-azure?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Ubuntu 26.04 LTSlinux-azure-fdepkg:deb/ubuntu/linux-azure-fde?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Ubuntu 26.04 LTSlinux-gcppkg:deb/ubuntu/linux-gcp?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Ubuntu 26.04 LTSlinux-gkepkg:deb/ubuntu/linux-gke?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
Description
In the Linux kernel, the following vulnerability has been resolved: s390/debug: Fix NULL pointer dereference in debug_info_copy() When debug_register_static() fails, it clears areas, active_pages and active_entries but leaves the area bounds unchanged. Copying such an area, either by opening its view file or via debug_dump(), makes debug_info_copy() dereference the NULL pointers. Skip the copy loop when the source has no areas.
References
- ubuntu.com/security/CVE-2026-98593 (opens in a new tab)
- cve.org/CVERecord?id=CVE-2026-98593 (opens in a new tab)
- git.kernel.org/stable/c/33f706884821da9cb55b650b7b1d4f2bdf800137 (opens in a new tab)
- git.kernel.org/stable/c/9c6af88fbefbe77608b77409df23a1617e28398c (opens in a new tab)
- git.kernel.org/stable/c/c593f38e1cdb92f87d01be4c4e5ac12417b1454b (opens in a new tab)
- git.kernel.org/stable/c/13decd3b3b3a4d8a2e603fb8c9ffde0c6be3c225 (opens in a new tab)
- git.kernel.org/stable/c/012bfcd5a51082d5a65f096dfb9ca652b5267965 (opens in a new tab)
- git.kernel.org/stable/c/a19bede30f0da5ae56782edac62b5998a7434cba (opens in a new tab)
- git.kernel.org/stable/c/2de9c458cc49d8db6408a7c5fbf0c7c94fe4d52b (opens in a new tab)