Is CVE-2026-10636 actively exploited?

No active exploitation of CVE-2026-10636 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-10636 be exploited remotely?

Yes. CVE-2026-10636 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-10636?

CVE-2026-10636 has a CVSS score of 3.7 (LOW).

HOME VULNERABILITIESCVE-2026-10636

LOW

CVE-2026-10636

CWE-416Published: June 16, 2026· Updated: Jun 17, 2026

3.7

CVSS v3.1

EPSS:0.25%probability of exploitation in 30 daysPercentile:16.3th

Official Description

In Zephyr's IPv4 IGMP implementation, igmp_send() in subsys/net/ip/igmp.c read the network interface back out of the packet via net_pkt_iface(pkt) after the packet had been handed to net_send_data(). On the successful-send path the packet's last reference may already have been released by the L2 driver or by the network stack's TX handling (synchronously in the default NET_TC_TX_COUNT=0 immediate-transmit configuration), returning the net_pkt slab block to its free list. The subsequent net_pkt_iface(pkt) dereferences the freed packet, a use-after-free read; with CONFIG_NET_STATISTICS_PER_INTERFACE the resulting dangling interface pointer is further dereferenced for a statistics-counter write. The IGMP send path is reachable without authentication from inbound IPv4 IGMP membership queries addressed to 224.0.0.1 (net_ipv4_igmp_input - send_igmp_report/send_igmp_v3_report - igmp_send), as well as from local multicast join/leave/rejoin operations. Realistic impact is undefined behavior and potential denial of service (sporadic crash or stats corruption); a controllable write requires the asynchronous TX path plus a concurrent slab reuse. The flaw was introduced with IGMPv2 support and affects releases from v2.6.0 through v4.4.0. The fix caches the interface pointer before sending. Note the analogous IPv6 MLD path (mld_send in subsys/net/ip/ipv6_mld.c) retains the same unfixed pattern.

NVD Source

Technical Analysis

CVE-2026-10636 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

From a weakness classification perspective (CWE-416): Use-after-free vulnerabilities involve accessing memory after it has been freed, often enabling arbitrary code execution.