CVE-2026-10641 Out-of-bounds write in Bluetooth HFP Hands-Free CIND indicator parsing (cind_handle_values)

Zephyr's Bluetooth Classic Hands-Free Profile HFP Hands-Free role parser subsys/bluetooth/host/classic/hfphf.c contains an out-of-bounds write. During Service Level Connection setup the HF sends AT+CIND=? and parses the AG's +CIND: response in cindhandle, which assigns a per-entry counter index a...

CVE-2026-10641

Zephyr Bluetooth Classic HFP HF CIND parser (subsys/bluetooth/host/classic/hfp_hf.c) contains an out-of-bounds write during +CIND=?/+CIND: handling. cind_handle_values() writes hf-ind_table[index] = i without verifying index is within the 20-element int8_t ind_table[]. A remote attacker could sen...

EUVD-2026-37702

Zephyr's Bluetooth Classic Hands-Free Profile HFP Hands-Free role parser subsys/bluetooth/host/classic/hfphf.c contains an out-of-bounds write. During Service Level Connection setup the HF sends AT+CIND=? and parses the AG's +CIND: response in cindhandle, which assigns a per-entry counter index a...

PT-2026-50394

Name of the Vulnerable Software and Affected Versions Zephyr versions 1.7 through 4.4.0 Description The Bluetooth Classic Hands-Free Profile HFP Hands-Free role parser in subsys/bluetooth/host/classic/hfp hf.c contains an out-of-bounds write. During Service Level Connection setup, the Hands-Free ...

CVE-2026-10639

In Zephyr's native IPv4 stack, icmpv4handleechorequest in subsys/net/ip/icmpv4.c builds an echo-reply packet reply, hands it to nettrysenddata, and then, on success, calls netstatsupdateicmpsentnetpktifacereply. nettrysenddata transfers ownership of reply to the TX path netiftryqueuetx - netiftx ...

CVE-2026-10640

Zephyr's IPv6 Neighbor Discovery send paths netipv6sendna, netipv6sendns, netipv6sendrs in subsys/net/ip/ipv6nbr.c updated the per-interface ICMP-sent statistics by calling netpktifacepkt after netsenddatapkt had already returned successfully. On the success path the network stack owns and releas...

CVE-2026-10636

In Zephyr's IPv4 IGMP implementation, igmpsend in subsys/net/ip/igmp.c read the network interface back out of the packet via netpktifacepkt after the packet had been handed to netsenddata. On the successful-send path the packet's last reference may already have been released by the L2 driver or b...

CVE-2026-10640 Use-after-free reading `net_pkt` `iface` after send in IPv6 Neighbor Discovery (`ipv6_nbr.c`)

Zephyr's IPv6 Neighbor Discovery send paths netipv6sendna, netipv6sendns, netipv6sendrs in subsys/net/ip/ipv6nbr.c updated the per-interface ICMP-sent statistics by calling netpktifacepkt after netsenddatapkt had already returned successfully. On the success path the network stack owns and releas...

CVE-2026-10640

Zephyr's IPv6 Neighbor Discovery send paths netipv6sendna, netipv6sendns, netipv6sendrs in subsys/net/ip/ipv6nbr.c updated the per-interface ICMP-sent statistics by calling netpktifacepkt after netsenddatapkt had already returned successfully. On the success path the network stack owns and releas...

CVE-2026-10640

Summary: Zephyr’s IPv6 Neighbor Discovery send paths (ipv6_nbr.c) perform a use-after-free by reading iface from a freed net_pkt slab block when updating per-interface ICMP statistics, after the packet has been sent. This can corrupt iface-stats.icmp.sent or cause a crash/DoS if the slab memory i...

CVE-2026-10638 Use-after-free in Zephyr ICMPv6 RX path when updating statistics after sending an echo reply or error

subsys/net/ip/icmpv6.c reads the network interface from a netpkt after that packet has been handed to nettrysenddata. In icmpv6handleechorequest and neticmpv6senderror, the post-send statistics update calls netpktifacereply/netpktifacepkt on the just-sent packet. The send path nettrysenddata -...

CVE-2026-10638 Use-after-free in Zephyr ICMPv6 RX path when updating statistics after sending an echo reply or error

subsys/net/ip/icmpv6.c reads the network interface from a netpkt after that packet has been handed to nettrysenddata. In icmpv6handleechorequest and neticmpv6senderror, the post-send statistics update calls netpktifacereply/netpktifacepkt on the just-sent packet. The send path nettrysenddata -...

CVE-2026-10638

The CVE describes a use-after-free in Zephyr’s ICMPv6 RX path: after sending an ICMPv6 Echo Request or an error, post-send statistics update references net_pkt_iface(reply/pkt) on a packet that may already be freed by net_try_send_data (or by the driver/L2). If CONFIG_NET_TC_TX_COUNT is 0 or the ...

CVE-2026-10638 Use-after-free in Zephyr ICMPv6 RX path when updating statistics after sending an echo reply or error

subsys/net/ip/icmpv6.c reads the network interface from a netpkt after that packet has been handed to nettrysenddata. In icmpv6handleechorequest and neticmpv6senderror, the post-send statistics update calls netpktifacereply/netpktifacepkt on the just-sent packet. The send path nettrysenddata -...

CVE-2026-10636 Use-after-free in Zephyr IPv4 IGMP send path (`igmp_send`)

In Zephyr's IPv4 IGMP implementation, igmpsend in subsys/net/ip/igmp.c read the network interface back out of the packet via netpktifacepkt after the packet had been handed to netsenddata. On the successful-send path the packet's last reference may already have been released by the L2 driver or b...

CVE-2026-10636 Use-after-free in Zephyr IPv4 IGMP send path (`igmp_send`)

In Zephyr's IPv4 IGMP implementation, igmpsend in subsys/net/ip/igmp.c read the network interface back out of the packet via netpktifacepkt after the packet had been handed to netsenddata. On the successful-send path the packet's last reference may already have been released by the L2 driver or b...

CVE-2026-10636 Use-after-free in Zephyr IPv4 IGMP send path (`igmp_send`)

In Zephyr's IPv4 IGMP implementation, igmpsend in subsys/net/ip/igmp.c read the network interface back out of the packet via netpktifacepkt after the packet had been handed to netsenddata. On the successful-send path the packet's last reference may already have been released by the L2 driver or b...

CVE-2026-10636

CVE-2026-10636 affects Zephyr’s IPv4 IGMP send path (igmp_send) where net_pkt_iface(pkt) dereferences a freed net_pkt after handoff to net_send_data. The underlying cause is use-after-free: on the successful-send path the packet’s last reference may be released by the L2 driver or TX handling, ye...

CVE-2026-10634

Zephyr's native TCP stack iterates the global connection list in nettcpforeach subsys/net/ip/tcp.c using the SYSSLISTFOREACHCONTAINERSAFE macro, which caches a pointer to the next list node. Prior to this fix the function released tcplock while invoking the per-connection callback and re-acquired...

CVE-2026-10634 Use-after-free in Zephyr native TCP `net_tcp_foreach()` due to dropping `tcp_lock` during the callback

Zephyr's native TCP stack iterates the global connection list in nettcpforeach subsys/net/ip/tcp.c using the SYSSLISTFOREACHCONTAINERSAFE macro, which caches a pointer to the next list node. Prior to this fix the function released tcplock while invoking the per-connection callback and re-acquired...