Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: net: ena: PHC: Fix potential use-after-free in get_timestamp Move the phc->active check and resp pointer assignment to after acquiring the spinlock. Previously, phc->active was checked without holding the lock, and resp was cached from ena_dev->phc.virt_addr before the lock was acquired. If ena_com_phc_destroy() runs between the lockless active check and the lock acquisition, it sets active=false, releases the lock, frees the DMA memory, and sets virt_addr=NULL. The get_timestamp path would then read a NULL virt_addr and dereference it. With both the active check and the pointer read under the lock, destroy cannot free the memory while get_timestamp is using it.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected e0ea34158ee8c4f7536cd781010339ff28c0d24c before 95e8ae9af2a61b4e72f5c585bf4c7d8aaf2a2c98; affected e0ea34158ee8c4f7536cd781010339ff28c0d24c before ca9ed40f28949353911dcb524ff8fff2f3409c97; affected e0ea34158ee8c4f7536cd781010339ff28c0d24c before e42c755582f0960e684298762f0ab927b3778376 |
| Linux / Linux | affected 6.17; unaffected 0 before 6.17; unaffected 6.18.33 through 6.18.*; unaffected 7.0.10 through 7.0.*; unaffected 7.1 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/95e8ae9af2a61b4e72f5c585bf4c7d8aaf2a2c98
- https://git.kernel.org/stable/c/ca9ed40f28949353911dcb524ff8fff2f3409c97
- https://git.kernel.org/stable/c/e42c755582f0960e684298762f0ab927b3778376
ADP enrichment
No English description supplied.
No references supplied.