{"apiVersion":"1.0","identifier":"CVE-2026-74550","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.","publishedAt":"2026-08-15T13:18:00","lastModifiedAt":"2026-08-19T17:21:10","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-74550","cvssScore":7.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","epssProbability":0.00479,"riskScore":0.78,"affectedProduct":"Linux kernel","affectedVersions":"unknown","vulnerabilityType":"Kernel","operatingSystems":[],"links":{"self":"https://www.redsauce.net/api/cves/CVE-2026-74550","webPages":{"es":"https://www.redsauce.net/es/cves/CVE-2026-74550","en":"https://www.redsauce.net/en/cves/CVE-2026-74550","fr":"https://www.redsauce.net/fr/cves/CVE-2026-74550","pt":"https://www.redsauce.net/pt/cves/CVE-2026-74550","de":"https://www.redsauce.net/de/cves/CVE-2026-74550","sk":"https://www.redsauce.net/sk/cves/CVE-2026-74550","el":"https://www.redsauce.net/el/cves/CVE-2026-74550"},"source":"https://nvd.nist.gov/vuln/detail/CVE-2026-74550"}}