Linux Kernel up to 7.2-rc4 ftrace race condition

CVSS Meta Temp Score
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CTI Interest Score
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7.4$0-$5k1.79-

Summaryinfo

A vulnerability labeled as critical has been found in Linux Kernel up to 6.6.147/6.12.100/6.18.41/7.1.5/7.2-rc4. Impacted is the function ftrace_regex_open/ftrace_graph_open/ftrace_regex_write/ftrace_graph_write/ftrace_regex_release/ftrace_graph_release of the component ftrace. Executing a manipulation can lead to race condition. This vulnerability is tracked as CVE-2026-68146. The attack is restricted to local execution. No exploit exists.

Detailsinfo

A vulnerability was found in Linux Kernel up to 6.6.147/6.12.100/6.18.41/7.1.5/7.2-rc4. It has been declared as critical. This vulnerability affects the function ftrace_regex_open/ftrace_graph_open/ftrace_regex_write/ftrace_graph_write/ftrace_regex_release/ftrace_graph_release of the component ftrace. The manipulation with an unknown input leads to a race condition vulnerability. The CWE definition for the vulnerability is CWE-362. The product contains a code sequence that can run concurrently with other code, and the code sequence requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence that is operating concurrently. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

In the Linux kernel, the following vulnerability has been resolved: ftrace: Add global mutex to serialize trace_parser access In ftrace, the trace_parser structure is allocated and initialized when a trace file is opened, and is subsequently used across write and release handlers to parse user input. The affected handler paths and their specific functions are: - Open paths: ftrace_regex_open(), ftrace_graph_open() - Write paths: ftrace_regex_write(), ftrace_graph_write() - Release paths: ftrace_regex_release(), ftrace_graph_release() If userspace opens a trace file descriptor and shares it across multiple threads, concurrent write calls will race on the parser's internal state, specifically the 'idx', 'cont', and 'buffer' fields, leading to corrupted input or undefined behavior. Fix this by adding a global mutex, parser_lock, to serialize all access to trace_parser across write and release paths, preventing concurrent corruption of parser state.

The advisory is available at git.kernel.org. This vulnerability was named CVE-2026-68146 since 07/30/2026. The exploitation appears to be easy. Local access is required to approach this attack. Additional levels of successful authentication are required for exploitation. Successful exploitation requires user interaction by the victim. Technical details are known, but there is no available exploit.

Upgrading to version 6.6.148, 6.12.101, 6.18.42, 7.1.6 or 7.2-rc5 eliminates this vulnerability. Applying the patch 3d0dd138a06c782f8b755cd1b6f9909494514ce1/90be137813e1a5bdfd671e40fe28004fb959d3e4/65bf73bee1a4f3722208ae46afc0fa5de76b9a0a/e807c9193d9493c7a0d039158ebb955050a76df1/7720b63bcef3f54c7fe288774b720a227d54a306 is able to eliminate this problem.

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Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.7
VulDB Meta Temp Score: 7.4

VulDB Base Score: 7.7
VulDB Temp Score: 7.4
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: Race condition
CWE: CWE-362
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: Partially

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 6.6.148/6.12.101/6.18.42/7.1.6/7.2-rc5
Patch: 3d0dd138a06c782f8b755cd1b6f9909494514ce1/90be137813e1a5bdfd671e40fe28004fb959d3e4/65bf73bee1a4f3722208ae46afc0fa5de76b9a0a/e807c9193d9493c7a0d039158ebb955050a76df1/7720b63bcef3f54c7fe288774b720a227d54a306

Timelineinfo

07/30/2026 CVE reserved
08/10/2026 +11 days Advisory disclosed
08/10/2026 +0 days VulDB entry created
08/10/2026 +0 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2026-68146 (🔒)
GCVE (CVE): GCVE-0-2026-68146
GCVE (VulDB): GCVE-100-387502

Entryinfo

Created: 08/10/2026 15:26
Changes: 08/10/2026 15:26 (59)
Complete: 🔍
Cache ID: 216::103

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