CVE-2022-49548

Kernel memory corruption via miscounted BPF programs

Published Feb 26, 2025 · Updated May 11, 2026

Array overflow in the Linux kernel allows local users to corrupt kernel memory by attaching excessive BPF modify-return programs. bpf_trampoline_get_progs() checks a count that excludes BPF_TRAMP_MODIFY_RETURN programs, then copies every attachment into a BPF_MAX_TRAMP_PROGS-sized array. The path requires local low-privileged access; successful exploitation writes beyond the intended kernel program array.

CVSS severity7.8
High
EPSS probability0.30%
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

Array overflow in the Linux kernel allows local users to corrupt kernel memory by attaching excessive BPF modify-return programs. bpf_trampoline_get_progs() checks a count that excludes BPF_TRAMP_MODIFY_RETURN programs, then copies every attachment into a BPF_MAX_TRAMP_PROGS-sized array. The path requires local low-privileged access; successful exploitation writes beyond the intended kernel program array.

The record

CVE
CVE-2022-49548
Published
Feb 26, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-129, T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 26, 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

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=5.7
  2. Affected versionversion=88fd9e5352fe05f7fe57778293aebd4cd106960b <32c4559c61652f24c9fdd5440342196fe37453bc
  3. Affected versionversion=88fd9e5352fe05f7fe57778293aebd4cd106960b <4f8897bcc20b9ae44758e0572538d741ab66f0dc
  4. Affected versionversion=88fd9e5352fe05f7fe57778293aebd4cd106960b <7f845de2863334bed4f362e95853f5e7bc323737
  5. Affected versionversion=88fd9e5352fe05f7fe57778293aebd4cd106960b <a2aa95b71c9bbec793b5c5fa50f0a80d882b3e8d
  6. Affected versionversion=88fd9e5352fe05f7fe57778293aebd4cd106960b <e36452d5da6325df7c10cffc60a9e68d21e2606d

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.7; version=88fd9e5352fe05f7fe57778293aebd4cd106960b <32c4559c61652f24c9fdd5440342196fe37453bc; version=88fd9e5352fe05f7fe57778293aebd4cd106960b <4f8897bcc20b9ae44758e0572538d741ab66f0dc; version=88fd9e5352fe05f7fe57778293aebd4cd106960b <7f845de2863334bed4f362e95853f5e7bc323737; version=88fd9e5352fe05f7fe57778293aebd4cd106960b <a2aa95b71c9bbec793b5c5fa50f0a80d882b3e8d; version=88fd9e5352fe05f7fe57778293aebd4cd106960b <e36452d5da6325df7c10cffc60a9e68d21e2606d

Published CVSS scores

7.8NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.8UbuntuCVSS: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.

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

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

CWE-129Improper Validation of Array Index
T1068Exploitation for Privilege Escalation

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