CVE-2022-48929

Kernel crash via out-of-range BPF type index

Published Aug 22, 2024 · Updated May 11, 2026

Out-of-bounds read in the Linux BPF verifier in Linux 5.16.11 allows local users to crash the kernel via a crafted BPF program. The verifier uses the flagged reg->type value directly as an index into reg2btf_ids, allowing an index beyond the array and dereference of an invalid BTF pointer. Local low-privileged access and a BPF program reaching kfunc verification are required; the demonstrated consequence is a kernel crash.

CVSS severity5.5
Medium
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Out-of-bounds read in the Linux BPF verifier in Linux 5.16.11 allows local users to crash the kernel via a crafted BPF program. The verifier uses the flagged reg->type value directly as an index into reg2btf_ids, allowing an index beyond the array and dereference of an invalid BTF pointer. Local low-privileged access and a BPF program reaching kfunc verification are required; the demonstrated consequence is a kernel crash.

The record

CVE
CVE-2022-48929
Published
Aug 22, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-125, CAPEC-540, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 22, 2024CVE 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

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=5.16.11 <5.16.12
  2. Affected versionversion=77459bc4d5e2c6f24db845780b4d9d60cf82d06a <f0ce1bc9e0235dd7412240be493d7ea65ed9eadc
  3. Affected versionversion=8d38cde47a7e17b646401fa92d916503caa5375e <8c39925e98d498b9531343066ef82ae39e41adae
  4. Affected versionversion=c25b2ae136039ffa820c26138ed4a5e5f3ab3841 <45ce4b4f9009102cd9f581196d480a59208690c1

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.16.11 <5.16.12; version=77459bc4d5e2c6f24db845780b4d9d60cf82d06a <f0ce1bc9e0235dd7412240be493d7ea65ed9eadc; version=8d38cde47a7e17b646401fa92d916503caa5375e <8c39925e98d498b9531343066ef82ae39e41adae; version=c25b2ae136039ffa820c26138ed4a5e5f3ab3841 <45ce4b4f9009102cd9f581196d480a59208690c1

Published CVSS scores

5.5Canonical UbuntuCVSS: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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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-125Out-of-bounds Read
CAPEC-540Overread Buffers
T1499.004Application or System Exploitation

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

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo