CVE-2022-49785

Local denial of service via SGX integer overflow

Published May 1, 2025 · Updated May 11, 2026

Integer overflow in affected Linux kernel versions allows local users to cause system-wide service interruption through crafted SGX ioctl arguments. The sgx_validate_offset_length() function in arch/x86/kernel/cpu/sgx/ioctl.c adds userspace-controlled offset and length values without first rejecting unsigned addition overflow, allowing a wrapped sum to pass enclave-size validation. Exploitation requires a local low-privileged process with access to the SGX enclave interface; published sources do not identify the precise interruption mode.

CVSS severity5.5
Medium
EPSS probability0.19%
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 affected Linux kernel versions allows local users to cause system-wide service interruption through crafted SGX ioctl arguments. The sgx_validate_offset_length() function in arch/x86/kernel/cpu/sgx/ioctl.c adds userspace-controlled offset and length values without first rejecting unsigned addition overflow, allowing a wrapped sum to pass enclave-size validation. Exploitation requires a local low-privileged process with access to the SGX enclave interface; published sources do not identify the precise interruption mode.

The record

CVE
CVE-2022-49785
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=5.11
  2. Affected versionversion=c6d26d370767fa227fc44b98a8bdad112efdf563 <3b1c10fb754b0b67165e3f055a4208e5ba26dc89
  3. Affected versionversion=c6d26d370767fa227fc44b98a8bdad112efdf563 <5277e3d633a5d4157987f4aff068caa55e36db19
  4. Affected versionversion=c6d26d370767fa227fc44b98a8bdad112efdf563 <f0861f49bd946ff94fce4f82509c45e167f63690

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.11; version=c6d26d370767fa227fc44b98a8bdad112efdf563 <3b1c10fb754b0b67165e3f055a4208e5ba26dc89; version=c6d26d370767fa227fc44b98a8bdad112efdf563 <5277e3d633a5d4157987f4aff068caa55e36db19; version=c6d26d370767fa227fc44b98a8bdad112efdf563 <f0861f49bd946ff94fce4f82509c45e167f63690

Published CVSS scores

5.5Amazon LinuxCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
4.8SUSECVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N
5.5NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5SUSECVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L

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.

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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