CVE-2026-72276

Local service interruption via probe-path memory leak

Published Aug 15, 2026 · Updated Aug 15, 2026

Memory leak in the Linux kernel metronomefb driver allows local users to interrupt service during failed device probing. On an error after fb_deferred_io_init allocates pagerefs, metronomefb_probe returns without calling fb_deferred_io_cleanup, leaving the allocation unreleased. Exploitation requires low-privilege local access and a high-complexity probe failure path; impact is limited to availability through kernel-memory exhaustion.

CVSS severity5.7
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 the Linux kernel metronomefb driver allows local users to interrupt service during failed device probing. On an error after fb_deferred_io_init allocates pagerefs, metronomefb_probe returns without calling fb_deferred_io_cleanup, leaving the allocation unreleased. Exploitation requires low-privilege local access and a high-complexity probe failure path; impact is limited to availability through kernel-memory exhaustion.

The record

CVE
CVE-2026-72276
Published
Aug 15, 2026
Updated
Aug 15, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 15, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 15, 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=186b89659c4c67cccead52961eab0ca3b23951dc <77e26383083c59a67244fcf2e70eecd354451906
  2. Affected versionversion=5.15.149 <5.15.212
  3. Affected versionversion=5.19
  4. Affected versionversion=56c134f7f1b58be08bdb0ca8372474a4a5165f31 <01708cf3dca2f88eca26269521cbcc8e2f054ee4
  5. Affected versionversion=56c134f7f1b58be08bdb0ca8372474a4a5165f31 <6854cf33dddb212bd7c3d69189623876e7334075
  6. Affected versionversion=56c134f7f1b58be08bdb0ca8372474a4a5165f31 <894632b862a39b3fe1cb5de06fbae86225ea64de
  7. Affected versionversion=56c134f7f1b58be08bdb0ca8372474a4a5165f31 <a889978ec44fe33edb3fb7140dcbbb8e6465c1cb
  8. Affected versionversion=56c134f7f1b58be08bdb0ca8372474a4a5165f31 <d54bb39cd34f44b32d5c4a8416fff8b01a9e76be
  9. Affected versionversion=56c134f7f1b58be08bdb0ca8372474a4a5165f31 <f779bd494f9521f89bfd4ce23953f3527341e9fd

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=186b89659c4c67cccead52961eab0ca3b23951dc <77e26383083c59a67244fcf2e70eecd354451906; version=5.15.149 <5.15.212; version=5.19; version=56c134f7f1b58be08bdb0ca8372474a4a5165f31 <01708cf3dca2f88eca26269521cbcc8e2f054ee4; version=56c134f7f1b58be08bdb0ca8372474a4a5165f31 <6854cf33dddb212bd7c3d69189623876e7334075; version=56c134f7f1b58be08bdb0ca8372474a4a5165f31 <894632b862a39b3fe1cb5de06fbae86225ea64de; version=56c134f7f1b58be08bdb0ca8372474a4a5165f31 <a889978ec44fe33edb3fb7140dcbbb8e6465c1cb; version=56c134f7f1b58be08bdb0ca8372474a4a5165f31 <d54bb39cd34f44b32d5c4a8416fff8b01a9e76be; version=56c134f7f1b58be08bdb0ca8372474a4a5165f31 <f779bd494f9521f89bfd4ce23953f3527341e9fd

Published CVSS scores

4.7SUSECVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
5.7SUSECVSS:4.0/AV:L/AC:H/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

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

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