CVE-2022-49780

Kernel memory exhaustion via failed HBA registration

Published May 1, 2025 · Updated May 11, 2026

Memory leak in Linux kernel tcm_loop allows local users to exhaust kernel memory through repeated failed HBA registration. tcm_loop_setup_hba_bus() omits put_device() when device_register() fails, preventing kobject cleanup from releasing the name allocated by dev_set_name(). Reachability requires tcm_loop HBA creation to enter that registration-error path; the bounded consequence is service interruption from kernel-memory consumption.

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

Memory leak in Linux kernel tcm_loop allows local users to exhaust kernel memory through repeated failed HBA registration. tcm_loop_setup_hba_bus() omits put_device() when device_register() fails, preventing kobject cleanup from releasing the name allocated by dev_set_name(). Reachability requires tcm_loop HBA creation to enter that registration-error path; the bounded consequence is service interruption from kernel-memory consumption.

The record

CVE
CVE-2022-49780
Published
May 1, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-401, 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

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=2.6.39
  2. Affected versionversion=3703b2c5d041a68095cdd22380c23ce27d449ad7 <28f7ff5e7559d226e63c7c5de74eb075a83d8c53
  3. Affected versionversion=3703b2c5d041a68095cdd22380c23ce27d449ad7 <41a6b8b527a5957fab41c3c05e25ad125268e2e9
  4. Affected versionversion=3703b2c5d041a68095cdd22380c23ce27d449ad7 <75205f1b47a88c3fac4f30bd7567e89b2887c7fd
  5. Affected versionversion=3703b2c5d041a68095cdd22380c23ce27d449ad7 <a636772988bafab89278e7bb3420d8e8eacfe912
  6. Affected versionversion=3703b2c5d041a68095cdd22380c23ce27d449ad7 <bc68e428d4963af0201e92159629ab96948f0893
  7. Affected versionversion=3703b2c5d041a68095cdd22380c23ce27d449ad7 <dce0589a3faec9e2e543e97bca7e62592ec85585

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=2.6.39; version=3703b2c5d041a68095cdd22380c23ce27d449ad7 <28f7ff5e7559d226e63c7c5de74eb075a83d8c53; version=3703b2c5d041a68095cdd22380c23ce27d449ad7 <41a6b8b527a5957fab41c3c05e25ad125268e2e9; version=3703b2c5d041a68095cdd22380c23ce27d449ad7 <75205f1b47a88c3fac4f30bd7567e89b2887c7fd; version=3703b2c5d041a68095cdd22380c23ce27d449ad7 <a636772988bafab89278e7bb3420d8e8eacfe912; version=3703b2c5d041a68095cdd22380c23ce27d449ad7 <bc68e428d4963af0201e92159629ab96948f0893; version=3703b2c5d041a68095cdd22380c23ce27d449ad7 <dce0589a3faec9e2e543e97bca7e62592ec85585

Published CVSS scores

4.8SUSECVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
3.3SUSECVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
5.5NIST National Vulnerability DatabaseCVSS: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-401Missing Release of Memory after Effective Lifetime
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

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