CVE-2025-68376

Summary

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.

Affected Software

VendorProductVersion RangeStatus
LinuxLinuxbd2767ec3df2775bc336f441f9068a989ccb919d < 70acbc9c77686b7a521af6d7a543dcd9c324cf07affected
LinuxLinuxbd2767ec3df2775bc336f441f9068a989ccb919d < cda077a19f5c8d6ec61e5b97deca203d95e3a422affected
LinuxLinuxbd2767ec3df2775bc336f441f9068a989ccb919d < 35501ac3c7d40a7bb9568c2f89d6b56beaf9bed3affected
LinuxLinuxfdd3ceb0001da6768bede9779a0190a42e65c404affected
LinuxLinux6.5.8 < 6.6affected
LinuxLinux6.6affected
LinuxLinux0 < 6.6unaffected
LinuxLinux6.17.13 <= 6.17.*unaffected
LinuxLinux6.18.2 <= 6.18.*unaffected
LinuxLinux6.19 <= *unaffected

Weaknesses

References