# CVE-2022-49709: linux: In the Linux kernel, the following vulnerability has been resolved:  cfi: Fix __cfi_slowpath_diag RCU usage with cpui...

CVE-2022-49709 is fixed in linux on 1 platform, first by DEBIAN-CVE-2022-49709, released February 26, 2025. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2022-49709
- Priority: Routine
- CVSS: 5.5 (medium)
- EPSS: 0.0026
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Feb 26, 2025

## Description

In the Linux kernel, the following vulnerability has been resolved:  cfi: Fix __cfi_slowpath_diag RCU usage with cpuidle  RCU_NONIDLE usage during __cfi_slowpath_diag can result in an invalid RCU state in the cpuidle code path:    WARNING: CPU: 1 PID: 0 at kernel/rcu/tree.c:613 rcu_eqs_enter+0xe4/0x138   ...   Call trace:     rcu_eqs_enter+0xe4/0x138     rcu_idle_enter+0xa8/0x100     cpuidle_enter_state+0x154/0x3a8     cpuidle_enter+0x3c/0x58     do_idle.llvm.6590768638138871020+0x1f4/0x2ec     cpu_startup_entry+0x28/0x2c     secondary_start_kernel+0x1b8/0x220     __secondary_switched+0x94/0x98  Instead, call rcu_irq_enter/exit to wake up RCU only when needed and disable interrupts for the entire CFI shadow/module check when we do.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 12.15 (bookworm) | 5.18.14-1 | [DEBIAN-CVE-2022-49709](https://patchblox.com/security/data/fix/linux/debian-cve-2022-49709.md) | Feb 26, 2025 |
| Linux | linux Debian 13.5 (trixie) | 5.18.14-1 | [DEBIAN-CVE-2022-49709](https://patchblox.com/security/data/fix/linux/debian-cve-2022-49709.md) | Feb 26, 2025 |
| Linux | linux Debian 14 | 5.18.14-1 | [DEBIAN-CVE-2022-49709](https://patchblox.com/security/data/fix/linux/debian-cve-2022-49709.md) | Feb 26, 2025 |

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Data as of 2026-11-08T00:53:09Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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