CVE-2022-49092

Kernel warning via mismatched nexthop route deletion

Published Feb 26, 2025 · Updated Aug 5, 2026

A route-deletion flaw in the Linux kernel allows local users to trigger a kernel warning through a crafted Netlink route request. fib_nh_match calls fib_info_nh on a fib_info backed by a nexthop object when an interface-qualified deletion omits nhid, improperly applying legacy nexthop matching. Reaching the condition requires local route-management privileges and a route using a nexthop object; the documented result is a warning, but panic_on_warn can convert it into a kernel panic.

CVSS severity5.5
Medium
EPSS probability0.27%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

A route-deletion flaw in the Linux kernel allows local users to trigger a kernel warning through a crafted Netlink route request. fib_nh_match calls fib_info_nh on a fib_info backed by a nexthop object when an interface-qualified deletion omits nhid, improperly applying legacy nexthop matching. Reaching the condition requires local route-management privileges and a route using a nexthop object; the documented result is a warning, but panic_on_warn can convert it into a kernel panic.

The record

CVE
CVE-2022-49092
Published
Feb 26, 2025
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 26, 2025CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=4c7e8084fd467ddb2b0e6c6011f9c1064afb7e56 <63ea57478aaa3e06a597081a0f537318fc04e49f
  2. Affected versionversion=4c7e8084fd467ddb2b0e6c6011f9c1064afb7e56 <6bf92d70e690b7ff12b24f4bfff5e5434d019b82
  3. Affected versionversion=4c7e8084fd467ddb2b0e6c6011f9c1064afb7e56 <907c97986d6fa77318d17659dd76c94b65dd27c5
  4. Affected versionversion=4c7e8084fd467ddb2b0e6c6011f9c1064afb7e56 <dcd689f9e2640c992f94eae9955b106f71c6825d
  5. Affected versionversion=4c7e8084fd467ddb2b0e6c6011f9c1064afb7e56 <f5064531c23ad646da7be8b938292b00a7e61438
  6. Affected versionversion=4c7e8084fd467ddb2b0e6c6011f9c1064afb7e56 <f8db5743d09523c0bb35f16e13691e3b7eb5dba0
  7. Affected versionversion=5.3

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4c7e8084fd467ddb2b0e6c6011f9c1064afb7e56 <63ea57478aaa3e06a597081a0f537318fc04e49f; version=4c7e8084fd467ddb2b0e6c6011f9c1064afb7e56 <6bf92d70e690b7ff12b24f4bfff5e5434d019b82; version=4c7e8084fd467ddb2b0e6c6011f9c1064afb7e56 <907c97986d6fa77318d17659dd76c94b65dd27c5; version=4c7e8084fd467ddb2b0e6c6011f9c1064afb7e56 <dcd689f9e2640c992f94eae9955b106f71c6825d; version=4c7e8084fd467ddb2b0e6c6011f9c1064afb7e56 <f5064531c23ad646da7be8b938292b00a7e61438; version=4c7e8084fd467ddb2b0e6c6011f9c1064afb7e56 <f8db5743d09523c0bb35f16e13691e3b7eb5dba0; version=5.3

Published CVSS scores

5.5NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

No sourced classifications are available.

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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