CVE-2025-68376 Details
Description
In the Linux kernel, the following vulnerability has been resolved: coresight: ETR: Fix ETR buffer use-after-free issue When ETR is enabled as CS_MODE_SYSFS, if the buffer size is changed and enabled again, currently sysfs_buf will point to the newly allocated memory(buf_new) and free the old memory(buf_old). But the etr_buf that is being used by the ETR remains pointed to buf_old, not updated to buf_new. In this case, it will result in a memory use-after-free issue. Fix this by checking ETR's mode before updating and releasing buf_old, if the mode is CS_MODE_SYSFS, then skip updating and releasing it.
A use-after-free vulnerability has been identified in the Linux kernel's Coresight component, specifically within the Event Trace Router (ETR) functionality. This issue arises when ETR is activated in 'CS_MODE_SYSFS'. If the buffer size is modified and ETR is re-enabled, the system's buffer will reference the newly allocated memory while deallocating the old memory. However, the ETR continues to reference the freed memory, leading to a use-after-free condition. The vulnerability affects several versions of the Linux kernel.
Users can apply the latest patches available in the Linux kernel stable tree to address this vulnerability.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Dec 24, 2025References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://git.kernel.org/stable/c/35501ac3c7d40a7bb9568c2f89d6b56beaf9bed3 | kernel.org | Source CodeVendor |
| https://git.kernel.org/stable/c/70acbc9c77686b7a521af6d7a543dcd9c324cf07 | kernel.org | Source CodeVendor |
| https://git.kernel.org/stable/c/cda077a19f5c8d6ec61e5b97deca203d95e3a422 | kernel.org | Source CodeVendor |
Weakness Enumeration
No weakness enumeration is available for this CVE.
Affected Products
| Product | Versions |
|---|---|
| Linux kernel | All versions |
CPE
Remediation
| |
| Qualcomm coresight-tmc-etr | All versions |
CPE
Remediation
| |
Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | kernel.org |
| Dec 24, 2025 | New CVE Received | kernel.org |