Linux Kernel up to 7.2-rc2 Damon mm/damon/sysfs-schemes.c damon_sysfs_scheme_add_dirs tried_regions uninitialized pointer

CVSS Meta Temp Score
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CTI Interest Score
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5.2$0-$5k0.00

Summaryinfo

A vulnerability categorized as problematic has been discovered in Linux Kernel up to 6.6.144/6.12.96/6.18.39/7.1.4/7.2-rc2. This impacts the function damon_sysfs_scheme_add_dirs of the file mm/damon/sysfs-schemes.c of the component Damon. Such manipulation of the argument tried_regions leads to uninitialized pointer. This vulnerability is listed as CVE-2026-72176. The attack may be performed from remote. There is no available exploit.

Detailsinfo

A vulnerability was found in Linux Kernel up to 6.6.144/6.12.96/6.18.39/7.1.4/7.2-rc2. It has been rated as problematic. Affected by this issue is the function damon_sysfs_scheme_add_dirs of the file mm/damon/sysfs-schemes.c of the component Damon. The manipulation of the argument tried_regions with an unknown input leads to a uninitialized pointer vulnerability. Using CWE to declare the problem leads to CWE-824. The product accesses or uses a pointer that has not been initialized. Impacted is integrity, and availability. CVE summarizes:

In the Linux kernel, the following vulnerability has been resolved: mm/damon/sysfs-schemes: put stats for scheme_add_dirs() internal error damon_sysfs_scheme_add_dirs() setup the tried_regions directory after the stats directory setup is completed. When the tried_regions directory setup is failed, the setup function ensures the reference for the tried regions directory is released. Hence the error path should put references on setup succeeded directory objects, starting from the stats directory. However, the error path is putting the tried_regions directory instead of the stats directory. As a direct result, the stats directory object is leaked. Worse yet, if the tried_regions directory setup failed from the initial allocation, the scheme->tried_regions field remains uninitialized. The following kobject_put(&scheme->tried_regions->kobj) call in the error path will dereference the uninitialized memory. The setup failures should not be common. But once it happens, the consequence is quite bad. Fix this issue by correctly putting the stats directory instead of the tried_regions directory. The issue was discovered [1] by Sashiko.

The advisory is shared for download at git.kernel.org. This vulnerability is handled as CVE-2026-72176 since 08/09/2026. The exploitation is known to be easy. The attack may be launched remotely. There are known technical details, but no exploit is available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 08/15/2026).

Upgrading to version 6.6.145, 6.12.97, 6.18.40, 7.1.5 or 7.2-rc3 eliminates this vulnerability. Applying the patch 50a753171d255895e5dd41566986b48dcec06f31/f63d6e5ba72aeacdee4fddc902bd7616cd62b919/40a04601a3f66cabd6629c258a07af645a658865/6b6b5d7c2c957136b92c00b77b7175259f13082b/05ea83ee88ca70f8932906d9f2617ff996f45b50 is able to eliminate this problem.

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Productinfo

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Version

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.4
VulDB Meta Temp Score: 5.2

VulDB Base Score: 5.4
VulDB Temp Score: 5.2
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: Uninitialized pointer
CWE: CWE-824 / CWE-908
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 6.6.145/6.12.97/6.18.40/7.1.5/7.2-rc3
Patch: 50a753171d255895e5dd41566986b48dcec06f31/f63d6e5ba72aeacdee4fddc902bd7616cd62b919/40a04601a3f66cabd6629c258a07af645a658865/6b6b5d7c2c957136b92c00b77b7175259f13082b/05ea83ee88ca70f8932906d9f2617ff996f45b50

Timelineinfo

08/09/2026 CVE reserved
08/15/2026 +6 days Advisory disclosed
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-2026-72176 (🔒)
GCVE (CVE): GCVE-0-2026-72176
GCVE (VulDB): GCVE-100-390608

Entryinfo

Created: 08/15/2026 13:16
Changes: 08/15/2026 13:16 (61)
Complete: 🔍
Cache ID: 216::103

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