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CVE-2026-100082 xen-blkback: Avoid UAF when reading I/O statistics
Description
In the Linux kernel, the following vulnerability has been resolved: xen-blkback: Avoid UAF when reading I/O statistics Reading I/O statistics via sysfs concurrently with tearing down a frontend device might result in UAF or a NULL dereference, as the reading of the statistics data is not synchronized with freeing the data. Use a rwlock for synchronizing. This is XSA-528 / CVE-2026-100082
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| Linux 7.3 | earliest → < 7.3.3 | 7.3.3 |
| Linux 6.18 | earliest → < 6.18.62 | 6.18.62 |
| Linux 6.12 | earliest → < 6.12.116 | 6.12.116 |
| Linux 6.6 | earliest → < 6.6.162 | 6.6.162 |
| Linux 6.1 | earliest → < 6.1.192 | 6.1.192 |
| Linux 5.15 | earliest → < 5.15.225 | 5.15.225 |
| Linux 5.10 | earliest → < 5.10.274 | 5.10.274 |
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