CVE-2026-57842 — NetBSD COMPAT_NETBSD32 Double Free / Use-After-Free via recvmsg() msg_iovlen
NetBSD contains a use-after-free and double-free vulnerability in msg_recv_copyin() within the COMPAT_NETBSD32 compatibility layer due to a missing return statement before the c…
Published: 2026-09-11 · CVSS: 7.3 · CVSS 4.0
NetBSD contains a use-after-free and double-free vulnerability in msg_recv_copyin() within the COMPAT_NETBSD32 compatibility layer due to a missing return statement before the cleanup label on the success path. Any local user able to execute a 32-bit binary on a 64-bit NetBSD system can trigger a kernel panic or memory corruption by calling recvmsg() with msg_iovlen between 9 and IOV_MAX, causing the kernel to access a freed iovec buffer and subsequently free the same allocation a second time.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7