CVE-2026-98353: RDMA/erdma: Use IRQ-safe XArray helpers for QP and CQ tables

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: 2026-10-06 · updated 2026-10-30

Description

In the Linux kernel, the following vulnerability has been resolved: RDMA/erdma: Use IRQ-safe XArray helpers for QP and CQ tables Locked QP and CQ lookups from EQ interrupts can deadlock with create-path XArray updates. If an interrupt arrives while the create path holds the plain xa_lock, the lookup spins forever trying to acquire the same lock. Use IRQ-safe XArray helpers for all QP and CQ create-path updates, including the GSI QP store and error paths. Initialize both arrays with XA_FLAGS_LOCK_IRQ so sleeping allocations preserve interrupt state.

Affected products

Linux: from 6.1.188 before 6.2; from 6.6.157 before 6.7; from 6.12.110 before 6.13; from 6.1.191 before 6.2; from 6.6.160 before 6.7 — fixed in 6.2, 6.7, 6.13

How to fix

Upgrade to a fixed version: Linux 6.2, 6.7, 6.13. Check the vendor advisory for mitigations.

References

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