CVE-2022-49811

Kernel memory corruption via unsafe connection iteration

Published May 1, 2025 · Updated May 11, 2026

Use-after-free in the Linux kernel DRBD driver from 3.15 allows local users to corrupt kernel memory during device creation. drbd_create_device() walks the resource connection list with a non-safe iterator, while its error path calls drbd_destroy_connection() and frees the current connection. Exploitation requires local low-privilege access and a configured DRBD resource; no reliable outcome beyond unsafe access to freed kernel memory is published.

CVSS severity7.8
High
EPSS probability0.22%
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

Use-after-free in the Linux kernel DRBD driver from 3.15 allows local users to corrupt kernel memory during device creation. drbd_create_device() walks the resource connection list with a non-safe iterator, while its error path calls drbd_destroy_connection() and frees the current connection. Exploitation requires local low-privilege access and a configured DRBD resource; no reliable outcome beyond unsafe access to freed kernel memory is published.

The record

CVE
CVE-2022-49811
Published
May 1, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-416
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

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=3.15
  2. Affected versionversion=b6f85ef9538b2111a8ba0bbfae9aaebabfc94961 <7d93417d596402ddd46bd76c721f205d09d0d025
  3. Affected versionversion=b6f85ef9538b2111a8ba0bbfae9aaebabfc94961 <813a8dd9c45fd46f5cbbfbedf0791afa7740ccf5
  4. Affected versionversion=b6f85ef9538b2111a8ba0bbfae9aaebabfc94961 <9ed51414aef6e59e832e2960f10766dce2d5b1a1
  5. Affected versionversion=b6f85ef9538b2111a8ba0bbfae9aaebabfc94961 <a7a1598189228b5007369a9622ccdf587be0730f
  6. Affected versionversion=b6f85ef9538b2111a8ba0bbfae9aaebabfc94961 <bf47ca1b35fc1f55091ffaff5fbe41ea0c6f59a1
  7. Affected versionversion=b6f85ef9538b2111a8ba0bbfae9aaebabfc94961 <c2a00b149836d60c222930bbea6b2139caf34d4f
  8. Affected versionversion=b6f85ef9538b2111a8ba0bbfae9aaebabfc94961 <fc1897f16ebcfd22364f2afcc27f53a740f3bc7a

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=3.15; version=b6f85ef9538b2111a8ba0bbfae9aaebabfc94961 <7d93417d596402ddd46bd76c721f205d09d0d025; version=b6f85ef9538b2111a8ba0bbfae9aaebabfc94961 <813a8dd9c45fd46f5cbbfbedf0791afa7740ccf5; version=b6f85ef9538b2111a8ba0bbfae9aaebabfc94961 <9ed51414aef6e59e832e2960f10766dce2d5b1a1; version=b6f85ef9538b2111a8ba0bbfae9aaebabfc94961 <a7a1598189228b5007369a9622ccdf587be0730f; version=b6f85ef9538b2111a8ba0bbfae9aaebabfc94961 <bf47ca1b35fc1f55091ffaff5fbe41ea0c6f59a1; version=b6f85ef9538b2111a8ba0bbfae9aaebabfc94961 <c2a00b149836d60c222930bbea6b2139caf34d4f; version=b6f85ef9538b2111a8ba0bbfae9aaebabfc94961 <fc1897f16ebcfd22364f2afcc27f53a740f3bc7a

Published CVSS scores

7.8NIST NVDCVSS: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 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-416Use After Free

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