Answer in brief
CVE-2026-74550 records a Unknown severity 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). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. 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). 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 |
Published upstream
Aug 15, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 15, 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.
Answer in brief
CVE-2026-74550 records a Unknown severity 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). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. 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). 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 |
Published upstream
Aug 15, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 15, 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.