What’s Vulnerable › Vulnerabilities

CVE-2026-98790: perf: Fix race between perf_event_exit_task() and perf_pending_task()

• 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 2026-10-30

Description

In the Linux kernel, the following vulnerability has been resolved: perf: Fix race between perf_event_exit_task() and perf_pending_task() A race condition exists between perf_event_exit_task() and perf_pending_task() during begin_new_exec(). During begin_new_exec(), perf_event_exit_task() may be called, and the PF_EXITING flag is not set on task. So perf_sigtrap() continues to execute and triggers WARN_ON_ONCE(event->ctx->task != current). Since both task exit and exec paths can call perf_event_exit_task() which sets ctx->task to TASK_TOMBSTONE, fix this by explicitly checking if event->ctx->task equals TASK_TOMBSTONE and dropping the redundant PF_EXITING check.

Affected products

• Linux: 5.13 — fixed in 7.3

How to fix

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

References

• https://git.kernel.org/stable/c/524063fea29f8a841e49927ea7a8085194ad3ec2
• https://git.kernel.org/stable/c/655acfa713bce9ae9c81a654459890c2f58cb4e8
• https://git.kernel.org/stable/c/672b8a9ce8f51b991481dfde26fba5cc4340a91a
• https://git.kernel.org/stable/c/6e454fbe3e646d119ab75e907035950e0e857c09
• https://git.kernel.org/stable/c/81e61e3f8befa1bae3ec8e779d8ada5e5e362c21
• https://git.kernel.org/stable/c/a8a6fe5601fa2d2c0fbfb3e531a1063f73c1eae3
• https://git.kernel.org/stable/c/ffb684f2aa141eeb0caa6308422e7e05d1ded7c4

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