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.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Ubuntu | — | Upgrade linux-image-6.17.0-1010-raspiUpgrade linux-image-6.17.0-19-genericUpgrade linux-image-azure-6.17Upgrade linux-image-generic-64k-hwe-24.04Upgrade linux-image-oem-24.04bUpgrade linux-image-6.17.0-1009-gcp-64kUpgrade linux-image-generic-6.17Upgrade linux-image-oracle-6.17Upgrade linux-image-6.17.0-1009-gcpUpgrade linux-image-oracleUpgrade linux-image-6.17.0-1008-realtimeUpgrade linux-image-6.17.0-1017-oemUpgrade linux-image-aws-6.17Upgrade linux-image-virtual-hwe-24.04Upgrade linux-image-genericUpgrade linux-image-aws-64kUpgrade linux-image-generic-64kUpgrade linux-image-oracle-64k-6.17Upgrade linux-image-virtualUpgrade linux-image-gcp-64k-6.17Upgrade linux-image-oracle-64kUpgrade linux-image-6.17.0-1009-aws-64kUpgrade linux-image-gcp-64kUpgrade linux-image-6.17.0-1010-azureUpgrade linux-image-azureUpgrade linux-image-6.17.0-1009-oracleUpgrade linux-image-6.17.0-1009-awsUpgrade linux-image-realtime-hwe-24.04Upgrade linux-image-realtime-6.17Upgrade linux-image-gcp-6.17Upgrade linux-image-6.17.0-19-generic-64kUpgrade linux-image-oem-24.04dUpgrade linux-image-oem-24.04aUpgrade linux-image-awsUpgrade linux-image-oem-24.04cUpgrade linux-image-raspi-6.17Upgrade linux-image-oem-24.04Upgrade linux-image-oem-6.17Upgrade linux-image-virtual-6.17Upgrade linux-image-generic-64k-6.17Upgrade linux-image-6.17.0-1009-oracle-64kUpgrade linux-image-gcpUpgrade linux-image-aws-64k-6.17Upgrade linux-image-realtimeUpgrade linux-image-raspiUpgrade linux-image-generic-hwe-24.04 | Mar 17, 2026 | Dec 24, 2025 |
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