Linux Kernel up to 7.1.4 sm501fb sm501fb.c edid_data/def_mode use after free

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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9.5$5k-$25k0.47

Summaryinfo

A vulnerability was found in Linux Kernel up to 7.1.4. It has been rated as very critical. Impacted is an unknown function of the file sm501fb.c of the component sm501fb. Performing a manipulation of the argument edid_data/def_mode results in use after free. This vulnerability is known as CVE-2026-74320. Remote exploitation of the attack is possible. No exploit is available.

Detailsinfo

A vulnerability classified as very critical has been found in Linux Kernel up to 7.1.4. This affects an unknown function of the file sm501fb.c of the component sm501fb. The manipulation of the argument edid_data/def_mode with an unknown input leads to a use after free vulnerability. CWE is classifying the issue as CWE-416. Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

In the Linux kernel, the following vulnerability has been resolved: fbdev: sm501fb: Fix buffer errors in OF binding code The code that gets the frame buffer mode from OF has 'use after free', 'buffer overrun' and memory leaks. info->edid_data isn't free if the probe functions fail or if pd->def_mode is set. If both the CRT and PANEL are enabled info->edid_data is used after being freed and is freed twice. The string returned by of_get_property(np, "mode", &len) is just written over either the static "640x480-16@60" or the module parameter string without any regard for the length (which is most likely longer). Use kstrump() for the OF mode and free everything before freeing 'info.

The advisory is shared at git.kernel.org. This vulnerability is uniquely identified as CVE-2026-74320 since 08/15/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. Technical details are known, but no exploit is available. The price for an exploit might be around USD $5k-$25k at the moment (estimation calculated on 08/15/2026).

Upgrading to version 5.10.261, 5.15.212, 6.1.178, 6.6.145, 6.12.97, 6.18.40, 7.1.5 or 7.2-rc1 eliminates this vulnerability. Applying the patch 0bc3d909a49e1fd8b8c3f2160d526e672c40621d/47008d59c60ed896085da95f8d4dd40e1677dd3a/d374f76e1257ecc5d691a765c512ed2c29a44741/b2ff450f7f5cfc7143cab57c3ad70293ba8b822a/9057e3f5db39f0ef0dac2f59f2bc59bf17e36c31/de590cdf7efec8a0b6da90ae2ab5fc5df26810b9/48cf0f4c6581ec90104cec9c5bf794a8bf347e30/d8421e09382cfe0bd2a044c8b0a822f64855dd4e is able to eliminate this problem.

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Productinfo

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Version

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Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 9.9
VulDB Meta Temp Score: 9.5

VulDB Base Score: 9.9
VulDB Temp Score: 9.5
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Use after free
CWE: CWE-416 / CWE-119
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kernel 5.10.261/5.15.212/6.1.178/6.6.145/6.12.97/6.18.40/7.1.5/7.2-rc1
Patch: 0bc3d909a49e1fd8b8c3f2160d526e672c40621d/47008d59c60ed896085da95f8d4dd40e1677dd3a/d374f76e1257ecc5d691a765c512ed2c29a44741/b2ff450f7f5cfc7143cab57c3ad70293ba8b822a/9057e3f5db39f0ef0dac2f59f2bc59bf17e36c31/de590cdf7efec8a0b6da90ae2ab5fc5df26810b9/48cf0f4c6581ec90104cec9c5bf794a8bf347e30/d8421e09382cfe0bd2a044c8b0a822f64855dd4e

Timelineinfo

08/15/2026 Advisory disclosed
08/15/2026 +0 days CVE reserved
08/15/2026 +0 days VulDB entry created
08/15/2026 +0 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2026-74320 (🔒)
GCVE (CVE): GCVE-0-2026-74320
GCVE (VulDB): GCVE-100-390285

Entryinfo

Created: 08/15/2026 09:28
Changes: 08/15/2026 09:28 (60)
Complete: 🔍
Cache ID: 216::103

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