CVE-2022-49030

Process memory corruption via ring-buffer mmap overflow

Published Oct 21, 2024 · Updated Aug 5, 2026

Integer overflow in Linux libbpf allows local users to read or corrupt process memory through a crafted 2 GB BPF ring buffer. In ring_buffer__add, 2 * max_entries wraps during mmap-size calculation, leaving a one-page mapping that later code indexes and unmaps as though it spans roughly 4 GB. Reachability requires an affected local libbpf consumer and either unprivileged BPF access or CAP_BPF; effects remain within that process and include disclosure, control-flow corruption, or a crash.

CVSS severity7.8
High
EPSS probability0.28%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Integer overflow in Linux libbpf allows local users to read or corrupt process memory through a crafted 2 GB BPF ring buffer. In ring_buffer__add, 2 * max_entries wraps during mmap-size calculation, leaving a one-page mapping that later code indexes and unmaps as though it spans roughly 4 GB. Reachability requires an affected local libbpf consumer and either unprivileged BPF access or CAP_BPF; effects remain within that process and include disclosure, control-flow corruption, or a crash.

The record

CVE
CVE-2022-49030
Published
Oct 21, 2024
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-190
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 21, 2024CVE 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=5.8
  2. Affected versionversion=bf99c936f9478a05d51e9f101f90de70bee9a89c <0140e079a42064680394fff1199a7b5483688dec
  3. Affected versionversion=bf99c936f9478a05d51e9f101f90de70bee9a89c <535a25ab4f9a45f74ba38ab71de95e97474922ed
  4. Affected versionversion=bf99c936f9478a05d51e9f101f90de70bee9a89c <8a549ab6724520aa3c07f47e0eba820293551490
  5. Affected versionversion=bf99c936f9478a05d51e9f101f90de70bee9a89c <927cbb478adf917e0a142b94baa37f06279cc466

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.8; version=bf99c936f9478a05d51e9f101f90de70bee9a89c <0140e079a42064680394fff1199a7b5483688dec; version=bf99c936f9478a05d51e9f101f90de70bee9a89c <535a25ab4f9a45f74ba38ab71de95e97474922ed; version=bf99c936f9478a05d51e9f101f90de70bee9a89c <8a549ab6724520aa3c07f47e0eba820293551490; version=bf99c936f9478a05d51e9f101f90de70bee9a89c <927cbb478adf917e0a142b94baa37f06279cc466

Published CVSS scores

7.8Linux Kernel CVE TeamCVSS: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

CWE-190Integer Overflow or Wraparound

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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