CVE-2025-68376
Published: December 27, 2025Last modified: November 3, 2026
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.
Status
| Product | Release | Package | Status |
|---|---|---|---|
| Alpaquita Linux | 23 LTS | linux-lts | Not affected (6.1.33-r0) |
| 25 LTS | linux-lts | Fixed (6.12.115-r0) | |
| Stream | linux-lts | Fixed (6.18.35-r1) |
References
- https://git.kernel.org/stable/c/35501ac3c7d40a7bb9568c2f89d6b56beaf9bed3
- https://git.kernel.org/stable/c/4e83434247ff8005a0b9a1ee997864abf8f259ec
- https://git.kernel.org/stable/c/5d5d130835b417c7bfd6c942f0149e34397d4463
- https://git.kernel.org/stable/c/70acbc9c77686b7a521af6d7a543dcd9c324cf07
- https://git.kernel.org/stable/c/cda077a19f5c8d6ec61e5b97deca203d95e3a422