CVE-2026-98476: Linux kernel · s390/cio: Fix NULL pointer dereference in ccw_device_get_util_str()
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/cio: Fix NULL pointer dereference in ccw_device_get_util_str() The channel path registry entry associated with a CHPID may be removed while the subchannel's PMCW still references that CHPID. In this case, chpid_to_chp() can return NULL, leading to a NULL pointer dereference. Add the missing NULL check before dereferencing the returned pointer.
References
- ubuntu.com/security/CVE-2026-98476 (opens in a new tab)
- cve.org/CVERecord?id=CVE-2026-98476 (opens in a new tab)
- git.kernel.org/stable/c/27e396a89f76f742abdbe9f8c4a58a6e806fdf59 (opens in a new tab)
- git.kernel.org/stable/c/44b16b02608058fc72198ac0205969f0f43065df (opens in a new tab)
- git.kernel.org/stable/c/dbf30e661ceb9a52c94c85719716391dcc29142a (opens in a new tab)
- git.kernel.org/stable/c/5fc54e04dad90b15d0430118b3f288a1d64e66c9 (opens in a new tab)
- git.kernel.org/stable/c/9d8b21820caed9128945fffcedf03e2a4c21eee2 (opens in a new tab)
- git.kernel.org/stable/c/5b76268dac968612f7283d59b539036de955b7d9 (opens in a new tab)
- git.kernel.org/stable/c/5e006ac90a4d331db1dd712b91fec849b45ffc01 (opens in a new tab)
- git.kernel.org/stable/c/c3bbcb32deecc06ebb1762398399b566d5ff2fc9 (opens in a new tab)