CVE-2026-74469 — Linux Vulnerability Details

What is CVE-2026-74469?

In the Linux kernel, the following vulnerability has been resolved: sctp: prevent peer transport count overflow sctp_assoc_add_peer() increments the association's 16-bit transport_count for every new unique peer. Adding the 65,536th transport wraps the count to zero. SCTP sock_diag uses transport_count to reserve the INET_DIAG_PEERS payload, then copies one sockaddr_storage for every entry in transport_addr_list. After the wrap, a diagnostic dump reserves an empty payload and writes 8 MiB of peer addresses past the skb tail. Reject a new unique peer when transport_count has reached U16_MAX. Perform the check after the existing-peer lookup so a duplicate address continues to return its existing transport at the limit.

Its CVSS v3 base vector states that the flaw is reachable remotely over the network, needs low-privilege credentials, needs no user interaction, and has high impact on confidentiality, integrity, availability. 1 affected-product entry is recorded, across 1 vendor, listed below. The identifier was first published 69 days ago.

Severity and exploitation probability

CVSS v3.1 base score: 8.8 — HIGH
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS (FIRST): 1.0% probability of exploitation in the next 30 days, higher than 64.1% of all scored CVEs
CISA KEV: Not listed in the CISA Known Exploited Vulnerabilities catalog
Threadlinqs priority: 9/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
Published: 2026-08-15, last modified 2026-08-19

Is CVE-2026-74469 being exploited?

Weaponised exploit code for CVE-2026-74469 is publicly available. 3 public proof-of-concept repositories are tracked for this identifier. It currently carries a trending score of 45 in the Threadlinqs vulnerability feed.

Affected products and versions

Linux: Linux

How to fix CVE-2026-74469

No vendor patch reference has been recorded for CVE-2026-74469 in the tracked sources. Follow the references below for a fix, and treat the products listed above as exposed until the vendor states otherwise.

Threat activity tracking CVE-2026-74469

1 tracked threat in the Threadlinqs corpus references CVE-2026-74469, either in the campaign’s CVE list or as an indicator on the campaign record.

"LPE Quartet": Public Exploits Released for Four Linux Kernel Local-Root Flaws (DirtyAH6, TUNderflow, PPPoEject, DiagSpill) — HIGH · 2026-09-18

Sources

Enriched from CVE.org, NVD, FIRST EPSS, public proof-of-concept repositories. Last verified by Threadlinqs on 2026-10-10. This product uses the NVD API but is not endorsed or certified by the NVD.

Other references

Showing 5 of 8 recorded references.