What’s Vulnerable › Vulnerabilities

CVE-2026-98593: s390/debug: Fix NULL pointer dereference in debug_info_copy()

• Severity: unknown
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-10-18 · updated 2026-10-19

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.

Affected products

• Linux kernel: 5.15 — fixed in 7.3

How to fix

Upgrade to a fixed version: Linux kernel 7.3. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/012bfcd5a51082d5a65f096dfb9ca652b5267965
• https://git.kernel.org/stable/c/13decd3b3b3a4d8a2e603fb8c9ffde0c6be3c225
• https://git.kernel.org/stable/c/2de9c458cc49d8db6408a7c5fbf0c7c94fe4d52b
• https://git.kernel.org/stable/c/33f706884821da9cb55b650b7b1d4f2bdf800137
• https://git.kernel.org/stable/c/9c6af88fbefbe77608b77409df23a1617e28398c
• https://git.kernel.org/stable/c/a19bede30f0da5ae56782edac62b5998a7434cba
• https://git.kernel.org/stable/c/c593f38e1cdb92f87d01be4c4e5ac12417b1454b

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