{"id":"CVE-2025-68376","title":"In the Linux kernel, the following vulnerability has been resolved:\n\ncoresight: ETR: Fix ETR buffer use-after-free issue\n\nWhen ETR is enabled as CS_MODE_SYSFS, if the buffer size is changed\nand enabled again, currently sysfs_buf will poi…","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\ncoresight: ETR: Fix ETR buffer use-after-free issue\n\nWhen ETR is enabled as CS_MODE_SYSFS, if the buffer size is changed\nand enabled again, currently sysfs_buf will poi…","severity":"none","published":"2025-12-24","updated":"2026-10-13","sourceUpdated":"2026-10-13T11:10:00.203","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2025-68376","references":[{"url":"https://git.kernel.org/stable/c/35501ac3c7d40a7bb9568c2f89d6b56beaf9bed3","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/70acbc9c77686b7a521af6d7a543dcd9c324cf07","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/cda077a19f5c8d6ec61e5b97deca203d95e3a422","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"tags":["nvd"],"epss":0.00186,"epssPercentile":0.0754,"ingestedAt":"2026-10-13T11:23:51.155Z","slug":"CVE-2025-68376","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\ncoresight: ETR: Fix ETR buffer use-after-free issue\n\nWhen ETR is enabled as CS_MODE_SYSFS, if the buffer size is changed\nand enabled again, currently sysfs_buf will point to the newly\nallocated memory(buf_new) and free the old memory(buf_old). But the\netr_buf that is being used by the ETR remains pointed to buf_old, not\nupdated to buf_new. In this case, it will result in a memory\nuse-after-free issue.\n\nFix this by checking ETR's mode before updating and releasing buf_old,\nif the mode is CS_MODE_SYSFS, then skip updating and releasing it.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}