What’s Vulnerable › Vulnerabilities

CVE-2026-89925: KVM: s390: Fix memory leak in guest debug handling

• 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: 2026-09-16 · updated 2026-10-19

Description

In the Linux kernel, the following vulnerability has been resolved: KVM: s390: Fix memory leak in guest debug handling bp_data is freed only for the error case by kfree(bp_data). Every successful KVM_SET_GUEST_DEBUG will leak bp_data.

Affected products

• Linux kernel: 3.16 — 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/121ea1de927c8b9bfdf53c31cad27b86d5de0293
• https://git.kernel.org/stable/c/39e7cebb889839b5762c9ad22e2d715b5883b288
• https://git.kernel.org/stable/c/44bf3792c10f4bb3de507391f1837e020d92eaa2
• https://git.kernel.org/stable/c/581be9f6085834188cef1ad2f07babf3b421e409
• https://git.kernel.org/stable/c/58b1b729a9f90c80b508fc3e2174cbc0ee50859e
• https://git.kernel.org/stable/c/5940418e4232a2ff1d30ba12e0d213dbf48f0a83
• https://git.kernel.org/stable/c/9071f75cbde3bf46119cb28e92cfbef830c4bf97
• https://git.kernel.org/stable/c/fc2034c431adcbaabf5f8a01912358f07355349e

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