Answer in brief
CVE-2026-74550 records a High severity (CVSS 7.5) vulnerability in net: do not send ICMP/NDISC Redirects when peer allocation fails. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 7.5. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=92d8682926342d2b6aa5b2ecc02221e00e1573a0 <f5ecaa7ea7686fa7ecdb6affc9d3a9a42e4524b1 || >=92d8682926342d2b6aa5b2ecc02221e00e1573a0 <21666f7af49a90ef44d474916b8ef4402dfd74f5 || >=92d8682926342d2b6aa5b2ecc02221e00e1573a0 <5ec5f00fc606a6df8434948c4552b3cb1176595d || >=92d8682926342d2b6aa5b2ecc02221e00e1573a0 <828f6670d110ff2bf44c743037b38badc315704c || >=92d8682926342d2b6aa5b2ecc02221e00e1573a0 <dbc3791e3b2472e1ccc08947e0f83b443470ff4f | f5ecaa7ea7686fa7ecdb6affc9d3a9a42e4524b1, 21666f7af49a90ef44d474916b8ef4402dfd74f5, 5ec5f00fc606a6df8434948c4552b3cb1176595d, 828f6670d110ff2bf44c743037b38badc315704c, dbc3791e3b2472e1ccc08947e0f83b443470ff4f |
| Linux/Linuxgeneric | 2.6.39 | Not reported |
| Linux/Linuxgeneric | >=92d8682926342d2b6aa5b2ecc02221e00e1573a0 <c0adf8b4247bcc5a145a25c1929006eb392580bb || >=92d8682926342d2b6aa5b2ecc02221e00e1573a0 <f5ecaa7ea7686fa7ecdb6affc9d3a9a42e4524b1 || >=92d8682926342d2b6aa5b2ecc02221e00e1573a0 <21666f7af49a90ef44d474916b8ef4402dfd74f5 || >=92d8682926342d2b6aa5b2ecc02221e00e1573a0 <5ec5f00fc606a6df8434948c4552b3cb1176595d || >=92d8682926342d2b6aa5b2ecc02221e00e1573a0 <828f6670d110ff2bf44c743037b38badc315704c || >=92d8682926342d2b6aa5b2ecc02221e00e1573a0 <dbc3791e3b2472e1ccc08947e0f83b443470ff4f | c0adf8b4247bcc5a145a25c1929006eb392580bb, f5ecaa7ea7686fa7ecdb6affc9d3a9a42e4524b1, 21666f7af49a90ef44d474916b8ef4402dfd74f5, 5ec5f00fc606a6df8434948c4552b3cb1176595d, 828f6670d110ff2bf44c743037b38badc315704c, dbc3791e3b2472e1ccc08947e0f83b443470ff4f |
Published upstream
Aug 15, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 19, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 15, 2026
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.
Quoted source text, attributed separately from HOL analysis.