What’s Vulnerable › Vulnerabilities

CVE-2022-50096: x86/kprobes: Update kcb status flag after singlestepping

• Severity: medium (CVSS 5.5 v3.1)
• 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: 2025-06-18 · updated 2026-06-17

Description

In the Linux kernel, the following vulnerability has been resolved: x86/kprobes: Update kcb status flag after singlestepping Fix kprobes to update kcb (kprobes control block) status flag to KPROBE_HIT_SSDONE even if the kp->post_handler is not set. This bug may cause a kernel panic if another INT3 user runs right after kprobes because kprobe_int3_handler() misunderstands the INT3 is kprobe's single stepping INT3.

Affected products

• Linux kernel: from 5.13 before 5.15.61; from 5.16 before 5.18.18; from 5.19 before 5.19.2 — fixed in 5.15.61, 5.18.18, 5.19.2

How to fix

Upgrade to a fixed version: Linux kernel 5.15.61, 5.18.18, 5.19.2. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/1cbf3882cb372bbe752efd7c3045ca1c9ab40ac6
• https://git.kernel.org/stable/c/663cdda2716b70751df9c7e60b81bd0850fdfe3c
• https://git.kernel.org/stable/c/b9c3401f7cac6ae291a16784dadcd1bf116218fe
• https://git.kernel.org/stable/c/dec8784c9088b131a1523f582c2194cfc8107dc0
• https://git.kernel.org/stable/c/edc2ac7c7265b33660fa0190898966b49966b855

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