CVE-2026-98476
Published Oct 18, 2026
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.
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References
Other References
https://git.kernel.org/stable/c/27e396a89f76f742abdbe9f8c4a58a6e806fdf59
https://git.kernel.org/stable/c/44b16b02608058fc72198ac0205969f0f43065df
https://git.kernel.org/stable/c/5b76268dac968612f7283d59b539036de955b7d9
https://git.kernel.org/stable/c/5e006ac90a4d331db1dd712b91fec849b45ffc01
https://git.kernel.org/stable/c/5fc54e04dad90b15d0430118b3f288a1d64e66c9
https://git.kernel.org/stable/c/9d8b21820caed9128945fffcedf03e2a4c21eee2
https://git.kernel.org/stable/c/c3bbcb32deecc06ebb1762398399b566d5ff2fc9
https://git.kernel.org/stable/c/dbf30e661ceb9a52c94c85719716391dcc29142a
Frequently Asked Questions
What is CVE-2026-98476? +
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.
How do I check if I'm vulnerable to CVE-2026-98476? +
You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.