A local user with the "receive" delegated ZFS permission can trigger kernel memory corruption via ZFS_IOC_RECV_NEW by sending a crafted receive stream in heal mode.
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 | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| FreeBSD | FreeBSD | unknown |
|
No data.
No data.
No data available yet.
No vendor fix or workaround currently provided.
Additional remediation guidance may be available on OpenCVE Cloud.
Tracking
Sign in to view the affected projects.
No advisories yet.
Wed, 19 Aug 2026 05:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | The ZFS_IOC_RECV_NEW ioctl, in the heal receive path, similarly truncated a 64-bit payload size to a 32-bit integer for allocation, then used the original 64-bit size as the length for a byteswap operation. A local user with the "receive" delegated ZFS permission can trigger kernel memory corruption via ZFS_IOC_RECV_NEW by sending a crafted receive stream in heal mode. | |
| Title | Kernel heap overflow in ZFS_IOC_RECV_NEW ioctl | |
| Weaknesses | CWE-122 | |
| References |
|
Subscriptions
No data.
MITRE
Status: PUBLISHED
Assigner: freebsd
Published:
Updated: 2026-08-19T05:15:29.940Z
Reserved: 2026-05-29T20:24:28.616Z
Link: CVE-2026-49430
Vulnrichment
No data.
NVD
Status : Received
Published: 2026-08-19T06:17:42.767
Modified: 2026-08-19T06:17:42.767
Link: CVE-2026-49430
Redhat
No data.
OpenCVE Enrichment
Updated: 2026-08-19T06:30:05Z
-
CWE-122
Heap-based Buffer Overflow