The vulnerability of the `ip6_err_gen_icmpv6_unreach()` function in the `net/ipv6/icmp.c` module of the Linux operating system allows a attacker to gain unauthorized access to protected information or cause service failures.

The vulnerability of the ip6errgenicmpv6unreach function in the net/ipv6/icmp.c module of the Linux operating system is related to access to resources through incompatible types. Exploiting this vulnerability can allow an attacker to gain unauthorized access to protected information or cause...

CVE-2026-53006

In the Linux kernel, the following vulnerability has been resolved: ipv6: fix possible UAF in icmpv6rcv Caching saddr and daddr before pskbpull is problematic since skb-head can change. Remove these temporary variables: - We only access &ipv6hdrskb-saddr and &ipv6hdrskb-daddr when netdbgratelimit...

CVE-2026-53006

The CVE-2026-53006 entry concerns a Use-After-Free in the Linux kernel IPv6 path (icmpv6_rcv) caused by caching IPv6 saddr/daddr before pskb_pull(), since skb->head can change. The fix removes temporary variables and ensures access to &ipv6_hdr(skb)->saddr and &ipv6_hdr(skb)->daddr only ...

Astra Linux – Vulnerability in Linux 6.12

In the Linux kernel, the following vulnerability has been resolved: In the inet section, RAW sockets using IPPROTORAW must drop incoming ICMP packets. Yizhou Zhao reported that simply having a RAW socket with the protocol set to IPPROTORAW 255 was dangerous. The code example: socketAFINET, SOCKRA...

Astra Linux – Vulnerability found in Linux 6.1, Linux 6.12

In the Linux kernel, the following vulnerability has been resolved: xfrm: fixed the race condition in ipRtbug for icmpRouteLookup reverse path icmpRouteLookup performs multiple route lookups to find a suitable route for sending ICMP error messages, with special handling for XFRM IPsec policies. T...

kernel: ip6_tunnel: clear skb2->cb[] in ip4ip6_err()

A flaw was found in the Linux kernel's IPv6 tunnel implementation. A remote attacker could exploit this flaw by sending malicious ICMPv6 error messages to cause a stack-based buffer overflow in the kernel's IPv4-over-IPv6 tunnel error handling code. This could result in a kernel crash denial of...

SUSE SLES15: libopenvswitch-3_5-0 / libovn-25_03-0 / openvswitch / etc (SUSE-SU-2026:2463-1)

The remote SUSE Linux SLES15 / SLESSAP15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2026:2463-1 advisory. This update for openvswitch fixes the following issues Update ovn to 25.03.3: - CVE-2026-5265: heap over-read in ICMP error respons...

SUSE-SU-2026:2463-1 Security update for openvswitch

This update for openvswitch fixes the following issues Update ovn to 25.03.3: - CVE-2026-5265: heap over-read in ICMP error response generation bsc1262498. - CVE-2026-5367: heap over-read in OVN DHCPv6 client ID processing bsc1262499...

CVE-2026-12539

Docker Sandboxes sbx blocks ICMP egress with an authorizer applied only at network-creation time, and does not re-apply it to networks rebuilt from disk when the Docker daemon restarts, so a restart-surviving sandbox forwards ICMP to arbitrary hosts. A workload inside a sandbox, which the threat...

EUVD-2026-37893

Docker Sandboxes sbx blocks ICMP egress with an authorizer applied only at network-creation time, and does not re-apply it to networks rebuilt from disk when the Docker daemon restarts, so a restart-surviving sandbox forwards ICMP to arbitrary hosts. A workload inside a sandbox, which the threat...

CVE-2026-12539 Docker Sandboxes ICMP egress restriction bypass after daemon restart

Docker Sandboxes sbx blocks ICMP egress with an authorizer applied only at network-creation time, and does not re-apply it to networks rebuilt from disk when the Docker daemon restarts, so a restart-surviving sandbox forwards ICMP to arbitrary hosts. A workload inside a sandbox, which the threat...

CVE-2026-12539

Docker Sandboxes (sbx) ICMP egress restriction can be bypassed after daemon restart. The issue arises because the authorizer is applied only at network creation and is not re-applied to networks rebuilt from disk on restart, allowing a restart-surviving sandbox to forward ICMP to arbitrary hosts....

PT-2026-50676

Name of the Vulnerable Software and Affected Versions Docker Sandboxes affected versions not specified Description Docker Sandboxes sbx fail to re-apply the ICMP egress authorizer to networks rebuilt from disk after a Docker daemon restart. This allows a restart-surviving sandbox to forward ICMP...

SUSE-SU-2026:22145-1 Security update for openvswitch

This update for openvswitch fixes the following issues - CVE-2026-5265: heap over-read in ICMP error response generation bsc1262498. - CVE-2026-5367: heap over-read in OVN DHCPv6 client ID processing bsc1262499. - CVE-2026-34956: Invalid memory access in conntrack FTP alg bsc1261273. Changes for...

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-2026-10639

Summary: Zephyr’s native IPv4 icmpv4_handle_echo_request() can perform a use-after-free when updating per-interface statistics after sending an ICMP echo reply. The code hands the echo-reply to the TX path, which may drop the packet and free the net_pkt before the post-send stats update runs. As ...

CVE-2026-10639 Use-after-free reading `net_pkt_iface()` of a sent ICMPv4 echo-reply packet in `icmpv4_handle_echo_request()`

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 ...

RXSA-2026:25121 Critical: kernel security update

The kernel packages contain the Linux kernel, the core of any Linux operating system. Security Fixes: kernel: geneve: Fix use-after-free in genevefinddev. CVE-2025-21858 kernel: smc: Fix use-after-free in tcpwritetimerhandler CVE-2023-53781 kernel: nbd: defer config unlock in nbdgenlconnect...

kernel: ipv6: icmp: clear skb2->cb[] in ip6_err_gen_icmpv6_unreach()

A flaw was found in the Linux kernel's IPv6 ICMP error generation. A remote attacker could send a specially crafted IPv4 ICMP error packet with a Common Internet Protocol Security Option CIPSO IP option. This could lead to incorrect handling of packet control block data when generating an IPv6 IC...

kernel-rt security update

An update is available for kernel-rt. This update affects Rocky Linux 8. A Common Vulnerability Scoring System CVSS base score, which gives a detailed severity rating, is available for each vulnerability from the CVE list The kernel-rt packages provide the Real Time Linux Kernel, which enables...