Description
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.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| The NetBSD Foundation | NetBSD | 8.0 – ≤ 8.3, 9.0 – < 9.5, 10.0 – ≤ 10.1 | 9.5 |
References
- Patch Commit vendor-advisory patch
- https://www.vulncheck.com/advisories/netbsd-compat-netbsd32-double-free-use-after-free-via-recvmsg-msg-iovlen third-party-advisory