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Vulnerability · Published Aug 15, 2026 · Assigned by Linux

CVE-2026-74550net: do not send ICMP/NDISC Redirects when peer allocation fails

High 7.5

In plain English

A high-severity security flaw in Linux from Linux. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 42% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)7.5High
Exploit odds (30 days)0.5%top 58.5% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

In the Linux kernel, the following vulnerability has been resolved: net: do not send ICMP/NDISC Redirects when peer allocation fails When inet_getpeer_v4() or inet_getpeer_v6() fails to allocate a peer entry under memory pressure or tree size caps, redirect handlers previously fell back to sending un-rate-limited ICMP/NDISC Redirect messages. In IPv4, ip_rt_send_redirect() called icmp_send() directly when peer == NULL. In IPv6, ip6_forward() and ndisc_send_redirect() passed a NULL peer into inet_peer_xrlim_allow(), which returned true when peer == NULL. Because ICMP/NDISC Redirects are not part of the default global rate limit mask (sysctl_icmp_ratemask), sending redirects when peer == NULL creates an un-rate-limited ICMP packet storm. Fix this by failing closed in ip_rt_send_redirect(), ip6_forward(), and ndisc_send_redirect() when peer is NULL.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12linux6.1.187-1DEBIAN-CVE-2026-74550
Debian:13linux6.12.105-1DEBIAN-CVE-2026-74550
Debian:14linux7.1.8-1DEBIAN-CVE-2026-74550
Debian:12linux-6.126.12.107-1~deb12u1DEBIAN-CVE-2026-74550
Ubuntu:22.04:LTSlinuxno fix listedUBUNTU-CVE-2026-74550
Ubuntu:24.04:LTSlinuxno fix listedUBUNTU-CVE-2026-74550
Ubuntu:26.04:LTSlinux7.0.0-42.42UBUNTU-CVE-2026-74550
Ubuntu:22.04:LTSlinux-allwinner-5.19no fix listedUBUNTU-CVE-2026-74550
Ubuntu:22.04:LTSlinux-awsno fix listedUBUNTU-CVE-2026-74550
Ubuntu:24.04:LTSlinux-awsno fix listedUBUNTU-CVE-2026-74550
Ubuntu:26.04:LTSlinux-aws7.0.0-1016.17UBUNTU-CVE-2026-74550
Ubuntu:22.04:LTSlinux-aws-5.19no fix listedUBUNTU-CVE-2026-74550
Ubuntu:24.04:LTSlinux-aws-6.14no fix listedUBUNTU-CVE-2026-74550
Ubuntu:24.04:LTSlinux-aws-6.17no fix listedUBUNTU-CVE-2026-74550
Ubuntu:22.04:LTSlinux-aws-6.2no fix listedUBUNTU-CVE-2026-74550
Ubuntu:22.04:LTSlinux-aws-6.5no fix listedUBUNTU-CVE-2026-74550
Ubuntu:22.04:LTSlinux-aws-6.8no fix listedUBUNTU-CVE-2026-74550
Ubuntu:24.04:LTSlinux-aws-7.0no fix listedUBUNTU-CVE-2026-74550
Ubuntu:22.04:LTSlinux-azureno fix listedUBUNTU-CVE-2026-74550
Ubuntu:24.04:LTSlinux-azureno fix listedUBUNTU-CVE-2026-74550
Ubuntu:26.04:LTSlinux-azureno fix listedUBUNTU-CVE-2026-74550
Ubuntu:22.04:LTSlinux-azure-5.19no fix listedUBUNTU-CVE-2026-74550
Ubuntu:24.04:LTSlinux-azure-6.11no fix listedUBUNTU-CVE-2026-74550
Ubuntu:24.04:LTSlinux-azure-6.14no fix listedUBUNTU-CVE-2026-74550
Ubuntu:24.04:LTSlinux-azure-6.17no fix listedUBUNTU-CVE-2026-74550
Ubuntu:22.04:LTSlinux-azure-6.2no fix listedUBUNTU-CVE-2026-74550
Ubuntu:22.04:LTSlinux-azure-6.5no fix listedUBUNTU-CVE-2026-74550
Ubuntu:22.04:LTSlinux-azure-6.8no fix listedUBUNTU-CVE-2026-74550
Ubuntu:24.04:LTSlinux-azure-7.0no fix listedUBUNTU-CVE-2026-74550
Ubuntu:22.04:LTSlinux-azure-fdeno fix listedUBUNTU-CVE-2026-74550
Ubuntu:24.04:LTSlinux-azure-fdeno fix listedUBUNTU-CVE-2026-74550
Ubuntu:26.04:LTSlinux-azure-fdeno fix listedUBUNTU-CVE-2026-74550
Ubuntu:22.04:LTSlinux-azure-fde-5.19no fix listedUBUNTU-CVE-2026-74550
Ubuntu:24.04:LTSlinux-azure-fde-6.14no fix listedUBUNTU-CVE-2026-74550
Ubuntu:24.04:LTSlinux-azure-fde-6.17no fix listedUBUNTU-CVE-2026-74550
Ubuntu:22.04:LTSlinux-azure-fde-6.2no fix listedUBUNTU-CVE-2026-74550
Ubuntu:22.04:LTSlinux-azure-fde-6.8no fix listedUBUNTU-CVE-2026-74550
Ubuntu:24.04:LTSlinux-azure-fde-7.0no fix listedUBUNTU-CVE-2026-74550
Ubuntu:24.04:LTSlinux-azure-nvidiano fix listedUBUNTU-CVE-2026-74550
Ubuntu:24.04:LTSlinux-azure-nvidia-6.14no fix listedUBUNTU-CVE-2026-74550
Ubuntu:22.04:LTSlinux-gcpno fix listedUBUNTU-CVE-2026-74550
Ubuntu:24.04:LTSlinux-gcpno fix listedUBUNTU-CVE-2026-74550
Ubuntu:26.04:LTSlinux-gcp7.0.0-1016.18UBUNTU-CVE-2026-74550
Ubuntu:22.04:LTSlinux-gcp-5.19no fix listedUBUNTU-CVE-2026-74550
Ubuntu:24.04:LTSlinux-gcp-6.11no fix listedUBUNTU-CVE-2026-74550
Ubuntu:24.04:LTSlinux-gcp-6.14no fix listedUBUNTU-CVE-2026-74550
Ubuntu:24.04:LTSlinux-gcp-6.17no fix listedUBUNTU-CVE-2026-74550
Ubuntu:22.04:LTSlinux-gcp-6.2no fix listedUBUNTU-CVE-2026-74550
Ubuntu:22.04:LTSlinux-gcp-6.5no fix listedUBUNTU-CVE-2026-74550
Ubuntu:22.04:LTSlinux-gcp-6.8no fix listedUBUNTU-CVE-2026-74550
Ubuntu:24.04:LTSlinux-gcp-7.0no fix listedUBUNTU-CVE-2026-74550
Ubuntu:22.04:LTSlinux-gkeno fix listedUBUNTU-CVE-2026-74550
Ubuntu:24.04:LTSlinux-gkeno fix listedUBUNTU-CVE-2026-74550
Ubuntu:26.04:LTSlinux-gkeno fix listedUBUNTU-CVE-2026-74550
Ubuntu:22.04:LTSlinux-gkeopno fix listedUBUNTU-CVE-2026-74550
Ubuntu:24.04:LTSlinux-gkeopno fix listedUBUNTU-CVE-2026-74550
Ubuntu:22.04:LTSlinux-hwe-5.19no fix listedUBUNTU-CVE-2026-74550
Ubuntu:24.04:LTSlinux-hwe-6.11no fix listedUBUNTU-CVE-2026-74550
Ubuntu:24.04:LTSlinux-hwe-6.14no fix listedUBUNTU-CVE-2026-74550
Ubuntu:24.04:LTSlinux-hwe-6.17no fix listedUBUNTU-CVE-2026-74550
Ubuntu:22.04:LTSlinux-hwe-6.2no fix listedUBUNTU-CVE-2026-74550
Ubuntu:22.04:LTSlinux-hwe-6.5no fix listedUBUNTU-CVE-2026-74550
Ubuntu:22.04:LTSlinux-hwe-6.8no fix listedUBUNTU-CVE-2026-74550
Ubuntu:24.04:LTSlinux-hwe-7.07.0.0-42.42~24.04.1UBUNTU-CVE-2026-74550
Ubuntu:22.04:LTSlinux-ibmno fix listedUBUNTU-CVE-2026-74550
Ubuntu:24.04:LTSlinux-ibmno fix listedUBUNTU-CVE-2026-74550
Ubuntu:26.04:LTSlinux-ibm7.0.0-1017.17UBUNTU-CVE-2026-74550
Ubuntu:22.04:LTSlinux-ibm-6.8no fix listedUBUNTU-CVE-2026-74550
Ubuntu:22.04:LTSlinux-intel-iot-realtimeno fix listedUBUNTU-CVE-2026-74550
Ubuntu:22.04:LTSlinux-intel-iotgno fix listedUBUNTU-CVE-2026-74550
Ubuntu:22.04:LTSlinux-kvmno fix listedUBUNTU-CVE-2026-74550
Ubuntu:22.04:LTSlinux-lowlatencyno fix listedUBUNTU-CVE-2026-74550
Ubuntu:24.04:LTSlinux-lowlatencyno fix listedUBUNTU-CVE-2026-74550
Ubuntu:22.04:LTSlinux-lowlatency-hwe-5.19no fix listedUBUNTU-CVE-2026-74550
Ubuntu:24.04:LTSlinux-lowlatency-hwe-6.11no fix listedUBUNTU-CVE-2026-74550
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.2no fix listedUBUNTU-CVE-2026-74550
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.5no fix listedUBUNTU-CVE-2026-74550
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.8no fix listedUBUNTU-CVE-2026-74550
Ubuntu:22.04:LTSlinux-nvidiano fix listedUBUNTU-CVE-2026-74550
Ubuntu:24.04:LTSlinux-nvidiano fix listedUBUNTU-CVE-2026-74550
Ubuntu:26.04:LTSlinux-nvidiano fix listedUBUNTU-CVE-2026-74550
Ubuntu:24.04:LTSlinux-nvidia-6.11no fix listedUBUNTU-CVE-2026-74550
Ubuntu:24.04:LTSlinux-nvidia-6.17no fix listedUBUNTU-CVE-2026-74550
Ubuntu:22.04:LTSlinux-nvidia-6.2no fix listedUBUNTU-CVE-2026-74550
Ubuntu:22.04:LTSlinux-nvidia-6.5no fix listedUBUNTU-CVE-2026-74550
Ubuntu:22.04:LTSlinux-nvidia-6.8no fix listedUBUNTU-CVE-2026-74550
Ubuntu:24.04:LTSlinux-nvidia-7.0no fix listedUBUNTU-CVE-2026-74550
Ubuntu:26.04:LTSlinux-nvidia-bosno fix listedUBUNTU-CVE-2026-74550
Ubuntu:24.04:LTSlinux-nvidia-lowlatencyno fix listedUBUNTU-CVE-2026-74550
Ubuntu:22.04:LTSlinux-nvidia-tegrano fix listedUBUNTU-CVE-2026-74550
Ubuntu:24.04:LTSlinux-nvidia-tegra6.8.0-1036.39UBUNTU-CVE-2026-74550
Ubuntu:22.04:LTSlinux-nvidia-tegra-igxno fix listedUBUNTU-CVE-2026-74550
Ubuntu:22.04:LTSlinux-oem-5.17no fix listedUBUNTU-CVE-2026-74550
Ubuntu:22.04:LTSlinux-oem-6.0no fix listedUBUNTU-CVE-2026-74550
Ubuntu:22.04:LTSlinux-oem-6.1no fix listedUBUNTU-CVE-2026-74550
Ubuntu:24.04:LTSlinux-oem-6.11no fix listedUBUNTU-CVE-2026-74550
Ubuntu:24.04:LTSlinux-oem-6.14no fix listedUBUNTU-CVE-2026-74550
Ubuntu:24.04:LTSlinux-oem-6.17no fix listedUBUNTU-CVE-2026-74550
Ubuntu:22.04:LTSlinux-oem-6.5no fix listedUBUNTU-CVE-2026-74550
Ubuntu:24.04:LTSlinux-oem-6.8no fix listedUBUNTU-CVE-2026-74550
Ubuntu:26.04:LTSlinux-oem-7.07.0.0-1017.17UBUNTU-CVE-2026-74550
Ubuntu:22.04:LTSlinux-oracleno fix listedUBUNTU-CVE-2026-74550
Ubuntu:24.04:LTSlinux-oracleno fix listedUBUNTU-CVE-2026-74550
Ubuntu:26.04:LTSlinux-oracle7.0.0-1015.16UBUNTU-CVE-2026-74550
Ubuntu:24.04:LTSlinux-oracle-6.14no fix listedUBUNTU-CVE-2026-74550
Ubuntu:24.04:LTSlinux-oracle-6.17no fix listedUBUNTU-CVE-2026-74550
Ubuntu:22.04:LTSlinux-oracle-6.5no fix listedUBUNTU-CVE-2026-74550
Ubuntu:22.04:LTSlinux-oracle-6.8no fix listedUBUNTU-CVE-2026-74550
Ubuntu:24.04:LTSlinux-oracle-7.0no fix listedUBUNTU-CVE-2026-74550
Ubuntu:22.04:LTSlinux-raspino fix listedUBUNTU-CVE-2026-74550
Ubuntu:24.04:LTSlinux-raspino fix listedUBUNTU-CVE-2026-74550
Ubuntu:26.04:LTSlinux-raspino fix listedUBUNTU-CVE-2026-74550
Ubuntu:24.04:LTSlinux-raspi-realtimeno fix listedUBUNTU-CVE-2026-74550
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2026-74550
Ubuntu:24.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2026-74550
Ubuntu:26.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2026-74550
Ubuntu:22.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2026-74550
Ubuntu:24.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2026-74550
Ubuntu:26.04:LTSlinux-riscv7.0.0-42.42.1UBUNTU-CVE-2026-74550
Ubuntu:22.04:LTSlinux-riscv-5.19no fix listedUBUNTU-CVE-2026-74550
Ubuntu:24.04:LTSlinux-riscv-6.14no fix listedUBUNTU-CVE-2026-74550
Ubuntu:24.04:LTSlinux-riscv-6.17no fix listedUBUNTU-CVE-2026-74550
Ubuntu:22.04:LTSlinux-riscv-6.5no fix listedUBUNTU-CVE-2026-74550
Ubuntu:22.04:LTSlinux-riscv-6.8no fix listedUBUNTU-CVE-2026-74550
Ubuntu:24.04:LTSlinux-riscv-7.07.0.0-42.42.1~24.04.1UBUNTU-CVE-2026-74550
Ubuntu:22.04:LTSlinux-starfive-5.19no fix listedUBUNTU-CVE-2026-74550
Ubuntu:22.04:LTSlinux-starfive-6.2no fix listedUBUNTU-CVE-2026-74550
Ubuntu:22.04:LTSlinux-starfive-6.5no fix listedUBUNTU-CVE-2026-74550
Ubuntu:24.04:LTSlinux-vmwareno fix listedUBUNTU-CVE-2026-74550
Ubuntu:24.04:LTSlinux-xilinxno fix listedUBUNTU-CVE-2026-74550
Ubuntu:22.04:LTSlinux-xilinx-zynqmpno fix listedUBUNTU-CVE-2026-74550

Affected products (as reported)

VendorProductVersions
Linux Linux 92d8682926342d2b6aa5b2ecc02221e00e1573a0 – before c0adf8b4247bcc5a145a25c1929006eb392580bb92d8682926342d2b6aa5b2ecc02221e00e1573a0 – before f5ecaa7ea7686fa7ecdb6affc9d3a9a42e4524b192d8682926342d2b6aa5b2ecc02221e00e1573a0 – before 21666f7af49a90ef44d474916b8ef4402dfd74f592d8682926342d2b6aa5b2ecc02221e00e1573a0 – before 5ec5f00fc606a6df8434948c4552b3cb1176595d92d8682926342d2b6aa5b2ecc02221e00e1573a0 – before 828f6670d110ff2bf44c743037b38badc315704c92d8682926342d2b6aa5b2ecc02221e00e1573a0 – before dbc3791e3b2472e1ccc08947e0f83b443470ff4f
Linux Linux 2.6.39

References