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.
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.
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Affected Vendors & Products
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Fixes
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References
History
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 |
|
Projects
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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
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NVD
Status : Received
Published: 2026-08-19T06:17:42.767
Modified: 2026-08-19T06:17:42.767
Link: CVE-2026-49430
Redhat
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OpenCVE Enrichment
Updated: 2026-08-19T06:30:05Z
Weaknesses