Heap-based Buffer Overflow Affecting freebsd package, versions [,14.3.0-p16)[14.4.0,14.4.0-p7)[15.0.0,15.0.0-p11)[15.1.0,15.1.0-p1)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published29 Aug 2026
- disclosed19 Aug 2026
- creditUnknown
Introduced: 19 Aug 2026
NewCVE-2026-49429 (opens in a new tab)How to fix?
Upgrade freebsd to version 14.3.0-p16, 14.4.0-p7, 15.0.0-p11, 15.1.0-p1 or higher.
Overview
Affected versions of this package are vulnerable to Heap-based Buffer Overflow via the ZFS_IOC_USERSPACE_MANY ioctl. An attacker can cause a kernel heap overflow by providing a crafted 64-bit buffer size that is truncated to 32 bits for kernel allocation but used as a 64-bit value when writing records, potentially leading to privilege escalation. This is only exploitable if the attacker has the "userused" delegated ZFS permission.