CVE-2026-74550

HIGHPre-NVD 7.57.5—
EchelonGraph scoreHIGH confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-08-15. a secondary CVSS source baseline 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 5 sources updated this week
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.5Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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.

CVSS v3
7.5
EG Score
7.5(high)
EG Risk
38(Track)
EG Risk 38/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity75% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
37%
KEV
Not listed

Published

August 15, 2026

Last Modified

August 19, 2026

Advisory Details (5)

Auto-updated Aug 17, 2026
No patch confirmed yet.
generic

net: do not send ICMP/NDISC Redirects when peer allocation fails - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/f5ecaa7ea7686fa7ecdb6affc9d3a9a42e4524b1
generic

net: do not send ICMP/NDISC Redirects when peer allocation fails - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/dbc3791e3b2472e1ccc08947e0f83b443470ff4f
generic

net: do not send ICMP/NDISC Redirects when peer allocation fails - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/828f6670d110ff2bf44c743037b38badc315704c
generic

net: do not send ICMP/NDISC Redirects when peer allocation fails - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/5ec5f00fc606a6df8434948c4552b3cb1176595d
generic

net: do not send ICMP/NDISC Redirects when peer allocation fails - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/21666f7af49a90ef44d474916b8ef4402dfd74f5

Vendor Advisories for CVE-2026-74550(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Data Freshness Timeline

(refreshed 30× in last 7d / 30× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-08-20 16:04 UTCGHSA enrichment
  2. 2026-08-20 04:51 UTCGHSA enrichment
  3. 2026-08-19 17:38 UTCEG score recompute
  4. 2026-08-19 17:38 UTCGHSA enrichment
  5. 2026-08-19 17:04 UTCEPSS rescore
  6. 2026-08-19 16:52 UTCEG score recompute
  7. 2026-08-19 16:52 UTCGHSA enrichment
  8. 2026-08-19 15:33 UTCGHSA enrichment
  9. 2026-08-19 04:12 UTCGHSA enrichment
  10. 2026-08-18 16:59 UTCEG score recompute
  11. 2026-08-18 16:59 UTCGHSA enrichment
  12. 2026-08-18 13:49 UTCEPSS rescore
  13. 2026-08-18 13:49 UTCEPSS rescore
  14. 2026-08-18 04:53 UTCGHSA enrichment
  15. 2026-08-17 17:40 UTCEG score recompute
  16. 2026-08-17 17:40 UTCGHSA enrichment
  17. 2026-08-17 13:47 UTCEPSS rescore
  18. 2026-08-17 06:23 UTCEG score recompute
  19. 2026-08-17 06:23 UTCGHSA enrichment
  20. 2026-08-17 05:54 UTCEG score recompute▲ 7.50
  21. 2026-08-17 05:54 UTCGHSA enrichment
  22. 2026-08-17 05:54 UTCMITRE cvelistV5CVSS v3 → 7.5 · severity → HIGH
  23. 2026-08-17 05:39 UTCEG score recompute
  24. 2026-08-17 05:39 UTCGHSA enrichment
  25. 2026-08-17 05:39 UTCMITRE cvelistV5
Show 5 more
  1. 2026-08-16 14:56 UTCEPSS rescore
  2. 2026-08-16 14:56 UTCEPSS rescore
  3. 2026-08-15 13:27 UTCNVD update
  4. 2026-08-15 12:38 UTCEG score recompute
  5. 2026-08-15 12:37 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-74550?
CVE-2026-74550 is a high vulnerability published on August 15, 2026. In the Linux kernel, the following vulnerability has been resolved: net: do not send ICMP/NDISC Redirects when peer allocation fails When inetgetpeerv4() or inetgetpeerv6() fails to allocate a peer entry under memory pressure or tree size caps, redirect handlers previously fell back to sending…
When was CVE-2026-74550 disclosed?
CVE-2026-74550 was first published in the National Vulnerability Database on August 15, 2026, with the most recent update on August 19, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-74550 actively exploited?
CVE-2026-74550 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 63.2% of all scored CVEs.
What is the CVSS score of CVE-2026-74550?
CVE-2026-74550 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2026-74550?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-74550, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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