CVE-2022-49888

Kernel panic via recursive kprobe debug exceptions

Published May 1, 2025 · Updated May 11, 2026

Denial of service in the Linux kernel allows local users to panic arm64 systems by triggering recursive debug exceptions through kprobes. The regression removed the non-probe protection from cortex_a76_erratum_1463225_debug_handler(), allowing a probe to recurse until the kernel stack overflows. Reaching the panic requires an arm64 kernel and permission to configure kprobes; the failure interrupts the entire host.

CVSS severity7.8
High
EPSS probability0.24%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in the Linux kernel allows local users to panic arm64 systems by triggering recursive debug exceptions through kprobes. The regression removed the non-probe protection from cortex_a76_erratum_1463225_debug_handler(), allowing a probe to recurse until the kernel stack overflows. Reaching the panic requires an arm64 kernel and permission to configure kprobes; the failure interrupts the entire host.

The record

CVE
CVE-2022-49888
Published
May 1, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 1, 2025CVE publishedPublication date reported by the CVE source.
  2. May 11, 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=5.12
  2. Affected versionversion=6459b8469753e9feaa8b34691d097cffad905931 <024f4b2e1f874934943eb2d3d288ebc52c79f55c
  3. Affected versionversion=6459b8469753e9feaa8b34691d097cffad905931 <71d6c33fe223255f4416a01514da2c0bc3e283e7
  4. Affected versionversion=6459b8469753e9feaa8b34691d097cffad905931 <db66629d43b2d12cb43b004a4ca6be1d03228e97

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.12; version=6459b8469753e9feaa8b34691d097cffad905931 <024f4b2e1f874934943eb2d3d288ebc52c79f55c; version=6459b8469753e9feaa8b34691d097cffad905931 <71d6c33fe223255f4416a01514da2c0bc3e283e7; version=6459b8469753e9feaa8b34691d097cffad905931 <db66629d43b2d12cb43b004a4ca6be1d03228e97

Published CVSS scores

7.8Canonical UbuntuCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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