CVE-2026-72274

Denial of service via hecubafb probe memory leak

Published Aug 15, 2026 · Updated Aug 15, 2026

Memory leakage in the Linux hecubafb driver allows local users to degrade service by repeatedly triggering failed driver probes. In hecubafb_probe(), fb_deferred_io_init() allocates pagerefs, but later probe errors release fb_info without calling fb_deferred_io_cleanup(). Reachability requires low-privileged local access and the Hecuba/Apollo framebuffer configuration; no data disclosure or modification is reported.

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

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Summary

What happened

Memory leakage in the Linux hecubafb driver allows local users to degrade service by repeatedly triggering failed driver probes. In hecubafb_probe(), fb_deferred_io_init() allocates pagerefs, but later probe errors release fb_info without calling fb_deferred_io_cleanup(). Reachability requires low-privileged local access and the Hecuba/Apollo framebuffer configuration; no data disclosure or modification is reported.

The record

CVE
CVE-2026-72274
Published
Aug 15, 2026
Updated
Aug 15, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-772, 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 <3eb2bc1009c2476426ffbaf642d7ac82f4685b4d
  2. Affected versionversion=5.15.149 <5.15.212
  3. Affected versionversion=5.19
  4. Affected versionversion=56c134f7f1b58be08bdb0ca8372474a4a5165f31 <2952767e399e2796d45644ea50f442988d2bb02d
  5. Affected versionversion=56c134f7f1b58be08bdb0ca8372474a4a5165f31 <612ea3a8e525580aa82f26ab873e285f5caf9d99
  6. Affected versionversion=56c134f7f1b58be08bdb0ca8372474a4a5165f31 <7de72f7534d961b117e0b051fa8798975036f5f3
  7. Affected versionversion=56c134f7f1b58be08bdb0ca8372474a4a5165f31 <9a94b85531852eb86283eca36ab041782c6b3518
  8. Affected versionversion=56c134f7f1b58be08bdb0ca8372474a4a5165f31 <cbef2a305a8a72969b86f96b7c07b86edde61aff
  9. Affected versionversion=56c134f7f1b58be08bdb0ca8372474a4a5165f31 <d684ce2db92b1093bcca2b42e5160a5fe23eb496

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=186b89659c4c67cccead52961eab0ca3b23951dc <3eb2bc1009c2476426ffbaf642d7ac82f4685b4d; version=5.15.149 <5.15.212; version=5.19; version=56c134f7f1b58be08bdb0ca8372474a4a5165f31 <2952767e399e2796d45644ea50f442988d2bb02d; version=56c134f7f1b58be08bdb0ca8372474a4a5165f31 <612ea3a8e525580aa82f26ab873e285f5caf9d99; version=56c134f7f1b58be08bdb0ca8372474a4a5165f31 <7de72f7534d961b117e0b051fa8798975036f5f3; version=56c134f7f1b58be08bdb0ca8372474a4a5165f31 <9a94b85531852eb86283eca36ab041782c6b3518; version=56c134f7f1b58be08bdb0ca8372474a4a5165f31 <cbef2a305a8a72969b86f96b7c07b86edde61aff; version=56c134f7f1b58be08bdb0ca8372474a4a5165f31 <d684ce2db92b1093bcca2b42e5160a5fe23eb496

Published CVSS scores

5.5Red HatCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
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
2.5Amazon LinuxCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/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

CWE-772Missing Release of Resource after Effective Lifetime
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

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