Description (CNA)
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 (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected bd2767ec3df2775bc336f441f9068a989ccb919d before 5d5d130835b417c7bfd6c942f0149e34397d4463; affected bd2767ec3df2775bc336f441f9068a989ccb919d before 4e83434247ff8005a0b9a1ee997864abf8f259ec; affected bd2767ec3df2775bc336f441f9068a989ccb919d before 70acbc9c77686b7a521af6d7a543dcd9c324cf07; affected bd2767ec3df2775bc336f441f9068a989ccb919d before cda077a19f5c8d6ec61e5b97deca203d95e3a422; affected bd2767ec3df2775bc336f441f9068a989ccb919d before 35501ac3c7d40a7bb9568c2f89d6b56beaf9bed3; affected fdd3ceb0001da6768bede9779a0190a42e65c404; affected 6.5.8 before 6.6 |
| Linux / Linux | affected 6.6; unaffected 0 before 6.6; unaffected 6.6.160 through 6.6.*; unaffected 6.12.114 through 6.12.*; unaffected 6.17.13 through 6.17.*; unaffected 6.18.2 through 6.18.*; unaffected 6.19 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/5d5d130835b417c7bfd6c942f0149e34397d4463
- https://git.kernel.org/stable/c/4e83434247ff8005a0b9a1ee997864abf8f259ec
- https://git.kernel.org/stable/c/70acbc9c77686b7a521af6d7a543dcd9c324cf07
- https://git.kernel.org/stable/c/cda077a19f5c8d6ec61e5b97deca203d95e3a422
- https://git.kernel.org/stable/c/35501ac3c7d40a7bb9568c2f89d6b56beaf9bed3