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.
Metrics
No CVSS score has been published yet.
Affected software
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux | >= bd2767ec3df2775bc336f441f9068a989ccb919d, < 5d5d130835b417c7bfd6c942f0149e34397d4463; >= bd2767ec3df2775bc336f441f9068a989ccb919d, < 4e83434247ff8005a0b9a1ee997864abf8f259ec; >= bd2767ec3df2775bc336f441f9068a989ccb919d, < 70acbc9c77686b7a521af6d7a543dcd9c324cf07; >= bd2767ec3df2775bc336f441f9068a989ccb919d, < cda077a19f5c8d6ec61e5b97deca203d95e3a422; >= bd2767ec3df2775bc336f441f9068a989ccb919d, < 35501ac3c7d40a7bb9568c2f89d6b56beaf9bed3; fdd3ceb0001da6768bede9779a0190a42e65c404; >= 6.5.8, < 6.6 |
| Linux | Linux | 6.6 |
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
Timeline
- Published
- Dec 24, 2025
- Last modified
- Oct 21, 2026
- NVD status
- Deferred