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
Analysis
Analysis and contextual insights are available on OpenCVE Cloud.
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | |||||||||||||||||||||||||||||||||||||||||||||
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| Linux | Linux | unaffected |
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| Linux | Linux | affected |
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No data.
No data.
No data available yet.
No solution or workaround provided in the CVE record.
Additional remediation guidance may be available on OpenCVE Cloud.
Tracking
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No advisories yet.
Fri, 06 Nov 2026 20:15:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Weaknesses | CWE-416 CWE-476 |
Fri, 06 Nov 2026 19:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| References |
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Fri, 06 Nov 2026 18:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| 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 | |
| Title | xen-blkback: Avoid UAF when reading I/O statistics | |
| First Time appeared |
Linux
Linux linux Kernel |
|
| CPEs | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | |
| Vendors & Products |
Linux
Linux linux Kernel |
|
| References |
|
|
MITRE
Status: PUBLISHED
Assigner: Linux
Published:
Updated: 2026-11-06T19:08:45.432Z
Reserved: 2026-09-25T10:25:14.456Z
Link: CVE-2026-100082
Vulnrichment
No data.
NVD
Status : Received
Published: 2026-11-06T19:17:03.517
Modified: 2026-11-06T19:17:03.517
Link: CVE-2026-100082
Redhat
No data.
OpenCVE Enrichment
Updated: 2026-11-06T20:00:10Z