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

CVSS 7.5 · High EPSS 0.44% · P37

Affected Version Matrix 12

VendorProductVersion RangeStatus
LinuxLinux92d8682926342d2b6aa5b2ecc02221e00e1573a0< f5ecaa7ea7686fa7ecdb6affc9d3a9a42e4524b1affected
92d8682926342d2b6aa5b2ecc02221e00e1573a0< 21666f7af49a90ef44d474916b8ef4402dfd74f5affected
92d8682926342d2b6aa5b2ecc02221e00e1573a0< 5ec5f00fc606a6df8434948c4552b3cb1176595daffected
92d8682926342d2b6aa5b2ecc02221e00e1573a0< 828f6670d110ff2bf44c743037b38badc315704caffected
92d8682926342d2b6aa5b2ecc02221e00e1573a0< dbc3791e3b2472e1ccc08947e0f83b443470ff4faffected
2.6.39affected
< 2.6.39unaffected
6.6.151≤ 6.6.*unaffected
… +4 more rows
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I. Basic Information for CVE-2026-74550

Vulnerability Information
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Vulnerability Title
net: do not send ICMP/NDISC Redirects when peer allocation fails
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5

Affected Products

VendorProductAffected VersionsCPESubscribe
LinuxLinux 92d8682926342d2b6aa5b2ecc02221e00e1573a0 ~ f5ecaa7ea7686fa7ecdb6affc9d3a9a42e4524b1 -
LinuxLinux 2.6.39 -

II. Public POCs for CVE-2026-74550

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III. Intelligence Information for CVE-2026-74550

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Patches & Fixes for CVE-2026-74550 (4)

Same Patch Batch · Linux · 2026-08-15 · 846 CVEs total

CVE-2026-7447510.0 CRITICALvxlan: use neigh_ha_snapshot() in route_shortcircuit()
CVE-2026-7242110.0 CRITICALipv4: fib: Don't ignore error route in local/main tables.
CVE-2026-7427910.0 CRITICALcrypto: cavium/cpt - fix DMA cleanup using wrong loop index
CVE-2026-7428010.0 CRITICALcrypto: marvell/octeontx - fix DMA cleanup using wrong loop index
CVE-2026-7430910.0 CRITICALvdpa/octeon_ep: fix IRQ-to-ring mapping in interrupt handler
CVE-2026-7240810.0 CRITICALgeneve: gate GRO hint in geneve_gro_complete() on gs->gro_hint
CVE-2026-7240710.0 CRITICALgeneve: validate inner network offset in geneve_gro_complete()
CVE-2026-724939.9 CRITICALnet: serialize netif_running() check in enqueue_to_backlog()
CVE-2026-744339.8 CRITICALrxrpc: Fix UAF in rxgk_issue_challenge()
CVE-2026-722089.8 CRITICALntfs: add bounds check before accessing EA entries
CVE-2026-720659.8 CRITICALnet: mana: Validate the packet length reported by the NIC
CVE-2026-720649.8 CRITICALnet: mana: Sync page pool RX frags for CPU
CVE-2026-724299.8 CRITICALipv6: ioam: fix type confusion of dst_entry
CVE-2026-723179.8 CRITICALSUNRPC: pin upper rpc_clnt across the TLS connect_worker
CVE-2026-744279.8 CRITICALafs: Fix netns teardown to cancel the preallocation charger
CVE-2026-721379.8 CRITICALxfrm: nat_keepalive: avoid double free on send error
CVE-2026-724369.8 CRITICALnetfilter: ipset: Don't use test_bit() in lockless RCU readers in hash types
CVE-2026-744289.8 CRITICALrxrpc: Fix double unlock in rxrpc_recvmsg()
CVE-2026-724519.8 CRITICALxfrm: Fix xfrm state cache insertion race
CVE-2026-720469.8 CRITICALgve: fix header buffer corruption with header-split and HW-GRO

Showing top 20 of 846 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

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