---
id: CVE-2026-74288
title: 'net: fib_rules: Don''t dump dying fib_rule in fib_rules_dump().'
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  net: fib_rules: Don't dump dying fib_rule in fib_rules_dump().

  rocker_router_fib_event() calls fib_rule_get() during RCU dump.

  If the fib_rule is dying, refcount_inc(…
severity: high
cvss: 7.8
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'
cvssSource: cna
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 5d7bfd141924a5ece21eb612ad3c56612f041c1e <
    0f929b59f4cd0e05bb1ecefe12b77e85911d4be2
  - >-
    Linux >= 5d7bfd141924a5ece21eb612ad3c56612f041c1e <
    4b7ae30c81c2ee10a644749a3704a5c797ccc308
  - >-
    Linux >= 5d7bfd141924a5ece21eb612ad3c56612f041c1e <
    2dfdc210d240bd48bb2ea746430b02b5571b6db9
  - >-
    Linux >= 5d7bfd141924a5ece21eb612ad3c56612f041c1e <
    a7ef30753353ba6a95d693b1863a0214222a199a
  - >-
    Linux >= 5d7bfd141924a5ece21eb612ad3c56612f041c1e <
    1fbc6c6efe78f4454a51afa0587efb6826f60f00
  - >-
    Linux >= 5d7bfd141924a5ece21eb612ad3c56612f041c1e <
    bb4a5b3c91af3c8d705bb2e9f6f8069a70db26fc
  - >-
    Linux >= 5d7bfd141924a5ece21eb612ad3c56612f041c1e <
    3af0bc1bd9039e2e50abf3e2d7fee411f38bce4e
  - >-
    Linux >= 5d7bfd141924a5ece21eb612ad3c56612f041c1e <
    2821e85c058f81c9948a2fb1a634f7b47457d51c
  - Linux 4.12
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-10-16T18:52:15.422794Z'
published: '2026-08-15'
updated: '2026-10-16'
sourceUpdated: '2026-10-16T18:55:30.358Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-74288'
references:
  - url: 'https://git.kernel.org/stable/c/0f929b59f4cd0e05bb1ecefe12b77e85911d4be2'
  - url: 'https://git.kernel.org/stable/c/4b7ae30c81c2ee10a644749a3704a5c797ccc308'
  - url: 'https://git.kernel.org/stable/c/2dfdc210d240bd48bb2ea746430b02b5571b6db9'
  - url: 'https://git.kernel.org/stable/c/a7ef30753353ba6a95d693b1863a0214222a199a'
  - url: 'https://git.kernel.org/stable/c/1fbc6c6efe78f4454a51afa0587efb6826f60f00'
  - url: 'https://git.kernel.org/stable/c/bb4a5b3c91af3c8d705bb2e9f6f8069a70db26fc'
  - url: 'https://git.kernel.org/stable/c/3af0bc1bd9039e2e50abf3e2d7fee411f38bce4e'
  - url: 'https://git.kernel.org/stable/c/2821e85c058f81c9948a2fb1a634f7b47457d51c'
tags:
  - cve.org
epss: 0.00176
epssPercentile: 0.06639
ingestedAt: '2026-10-16T19:46:24.384Z'
---

## Overview

In the Linux kernel, the following vulnerability has been resolved:

net: fib_rules: Don't dump dying fib_rule in fib_rules_dump().

rocker_router_fib_event() calls fib_rule_get() during RCU dump.

If the fib_rule is dying, refcount_inc() will complain about it.

Let's call refcount_inc_not_zero() in fib_rules_dump().

## Affected

- `Linux >= 5d7bfd141924a5ece21eb612ad3c56612f041c1e < 0f929b59f4cd0e05bb1ecefe12b77e85911d4be2`
- `Linux >= 5d7bfd141924a5ece21eb612ad3c56612f041c1e < 4b7ae30c81c2ee10a644749a3704a5c797ccc308`
- `Linux >= 5d7bfd141924a5ece21eb612ad3c56612f041c1e < 2dfdc210d240bd48bb2ea746430b02b5571b6db9`
- `Linux >= 5d7bfd141924a5ece21eb612ad3c56612f041c1e < a7ef30753353ba6a95d693b1863a0214222a199a`
- `Linux >= 5d7bfd141924a5ece21eb612ad3c56612f041c1e < 1fbc6c6efe78f4454a51afa0587efb6826f60f00`
- `Linux >= 5d7bfd141924a5ece21eb612ad3c56612f041c1e < bb4a5b3c91af3c8d705bb2e9f6f8069a70db26fc`
- `Linux >= 5d7bfd141924a5ece21eb612ad3c56612f041c1e < 3af0bc1bd9039e2e50abf3e2d7fee411f38bce4e`
- `Linux >= 5d7bfd141924a5ece21eb612ad3c56612f041c1e < 2821e85c058f81c9948a2fb1a634f7b47457d51c`
- `Linux 4.12`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.