CVE-2026-98476

s390/cio: Fix NULL pointer dereference in ccw_device_get_util_str()

State: Published
Severity: Not scored
Published: Oct 18, 2026
Updated: Oct 19, 2026
Reserved: Sep 25, 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.

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	199652309a4d6635fca19d7528d73ab9e219bd9a to before 9d8b21820caed9128945fffcedf03e2a4c21eee2Affected 199652309a4d6635fca19d7528d73ab9e219bd9a to before 5fc54e04dad90b15d0430118b3f288a1d64e66c9Affected 199652309a4d6635fca19d7528d73ab9e219bd9a to before 27e396a89f76f742abdbe9f8c4a58a6e806fdf59Affected 199652309a4d6635fca19d7528d73ab9e219bd9a to before dbf30e661ceb9a52c94c85719716391dcc29142aAffected 199652309a4d6635fca19d7528d73ab9e219bd9a to before 5e006ac90a4d331db1dd712b91fec849b45ffc01Affected 199652309a4d6635fca19d7528d73ab9e219bd9a to before c3bbcb32deecc06ebb1762398399b566d5ff2fc9Affected 199652309a4d6635fca19d7528d73ab9e219bd9a to before 44b16b02608058fc72198ac0205969f0f43065dfAffected 199652309a4d6635fca19d7528d73ab9e219bd9a to before 5b76268dac968612f7283d59b539036de955b7d9Affected
LinuxLinux	4.18Affected before 4.18Not affected 5.10.271 through 5.10.Not affected 5.15.222 through 5.15.Not affected 6.1.189 through 6.1.Not affected 6.6.158 through 6.6.Not affected 6.12.112 through 6.12.Not affected 6.18.55 through 6.18.Not affected 7.2.9 through 7.2.*Not affected 7.3 and laterNot affected

Product

Versions

LinuxLinux

199652309a4d6635fca19d7528d73ab9e219bd9a to before 9d8b21820caed9128945fffcedf03e2a4c21eee2Affected
199652309a4d6635fca19d7528d73ab9e219bd9a to before 5fc54e04dad90b15d0430118b3f288a1d64e66c9Affected
199652309a4d6635fca19d7528d73ab9e219bd9a to before 27e396a89f76f742abdbe9f8c4a58a6e806fdf59Affected
199652309a4d6635fca19d7528d73ab9e219bd9a to before dbf30e661ceb9a52c94c85719716391dcc29142aAffected
199652309a4d6635fca19d7528d73ab9e219bd9a to before 5e006ac90a4d331db1dd712b91fec849b45ffc01Affected
199652309a4d6635fca19d7528d73ab9e219bd9a to before c3bbcb32deecc06ebb1762398399b566d5ff2fc9Affected
199652309a4d6635fca19d7528d73ab9e219bd9a to before 44b16b02608058fc72198ac0205969f0f43065dfAffected
199652309a4d6635fca19d7528d73ab9e219bd9a to before 5b76268dac968612f7283d59b539036de955b7d9Affected

LinuxLinux

4.18Affected
before 4.18Not affected
5.10.271 through 5.10.*Not affected
5.15.222 through 5.15.*Not affected
6.1.189 through 6.1.*Not affected
6.6.158 through 6.6.*Not affected
6.12.112 through 6.12.*Not affected
6.18.55 through 6.18.*Not affected
7.2.9 through 7.2.*Not affected
7.3 and laterNot affected

References

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