CVE-2024-56746

Availability loss via leaked coherent DMA memory

Published Dec 29, 2024 · Updated May 11, 2026

Memory leak in the sh7760fb driver in Linux 2.6.27 and later allows local users to reduce availability through failed DMA cleanup. When screen_base or related framebuffer state is not ready, sh7760fb_free_mem() skips the coherent DMA allocation instead of releasing it. Exploitation requires local access and an SH7760 or SH7763 system using this hardware-specific LCDC driver; repeated failures consume DMA memory and can interrupt service.

CVSS severity3.3
Low
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

Memory leak in the sh7760fb driver in Linux 2.6.27 and later allows local users to reduce availability through failed DMA cleanup. When screen_base or related framebuffer state is not ready, sh7760fb_free_mem() skips the coherent DMA allocation instead of releasing it. Exploitation requires local access and an SH7760 or SH7763 system using this hardware-specific LCDC driver; repeated failures consume DMA memory and can interrupt service.

The record

CVE
CVE-2024-56746
Published
Dec 29, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-401, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Dec 29, 2024CVE 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=2.6.27
  2. Affected versionversion=4a25e41831ee851c1365d8b41decc22493b18e6d <0d3fb3b3e9d66f7b6346e3b90bc0ff48683539ce
  3. Affected versionversion=4a25e41831ee851c1365d8b41decc22493b18e6d <29216bb390e36daeebef66abaa02d9751330252b
  4. Affected versionversion=4a25e41831ee851c1365d8b41decc22493b18e6d <3dd9df8e5f34c6fc4217a7498c1fb3c352d4afc2
  5. Affected versionversion=4a25e41831ee851c1365d8b41decc22493b18e6d <40f4326ed05a3b3537556ff2a844958b9e779a98
  6. Affected versionversion=4a25e41831ee851c1365d8b41decc22493b18e6d <bad37309c8b8bf1cfc893750df0951a804009ca0
  7. Affected versionversion=4a25e41831ee851c1365d8b41decc22493b18e6d <d10cd53e5a7fb3b7c6f83d4d9a5ea1d97a3ed9a5
  8. Affected versionversion=4a25e41831ee851c1365d8b41decc22493b18e6d <d48cbfa90dce506030151915fa3346d67f964af4
  9. Affected versionversion=4a25e41831ee851c1365d8b41decc22493b18e6d <f4fbd70e15fafe36a7583954ce189aaf5536aeec
  10. Affected versionversion=4a25e41831ee851c1365d8b41decc22493b18e6d <f89d17ae2ac42931be2a0153fecbf8533280c927

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=2.6.27; version=4a25e41831ee851c1365d8b41decc22493b18e6d <0d3fb3b3e9d66f7b6346e3b90bc0ff48683539ce; version=4a25e41831ee851c1365d8b41decc22493b18e6d <29216bb390e36daeebef66abaa02d9751330252b; version=4a25e41831ee851c1365d8b41decc22493b18e6d <3dd9df8e5f34c6fc4217a7498c1fb3c352d4afc2; version=4a25e41831ee851c1365d8b41decc22493b18e6d <40f4326ed05a3b3537556ff2a844958b9e779a98; version=4a25e41831ee851c1365d8b41decc22493b18e6d <bad37309c8b8bf1cfc893750df0951a804009ca0; version=4a25e41831ee851c1365d8b41decc22493b18e6d <d10cd53e5a7fb3b7c6f83d4d9a5ea1d97a3ed9a5; version=4a25e41831ee851c1365d8b41decc22493b18e6d <d48cbfa90dce506030151915fa3346d67f964af4; version=4a25e41831ee851c1365d8b41decc22493b18e6d <f4fbd70e15fafe36a7583954ce189aaf5536aeec; version=4a25e41831ee851c1365d8b41decc22493b18e6d <f89d17ae2ac42931be2a0153fecbf8533280c927

Published CVSS scores

3.3CISA ADPCVSS:3.1/AV:L/AC:L/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.

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
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