CVE-2026-74469: In the Linux kernel, the following vulnerability has been resolved: sctp: prevent peer transport count overfl

This month

HIGH 8.8WATCHLIST

CVE-2026-74469 is a high-severity flaw (CVSS 8.8) affecting affected software. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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 d

Why this priority

High severity
On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	8.8 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	1.5% (top 26%)
CISA exploited list	No
Published	2026-08-15
Last modified	2026-10-16

Publisher (CNA): kernel.org

Last updated 2026-10-16 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Timeline

2026-08-15 13:17 UTCPublished CVE record published
2026-10-16 20:17 UTCUpdated Record last modified

Exact fixes by distribution

Fedora 46 · fzssh · FIXED · 1.4.0-2.fc46 · FEDORA-2026-8004fcd067 · source

sudo dnf upgrade --advisory=FEDORA-2026-8004fcd067

Ubuntu 22.04 · linux · FIXED · 5.15.0-198.208

sudo apt update && sudo apt install --only-upgrade linux dpkg --compare-versions "$(dpkg-query -W -f='${Version}' linux)" ge "5.15.0-198.208" && echo PATCHED || echo STILL-VULNERABLE

Ubuntu 20.04 · linux · NO FIX YET

Ubuntu 24.04 · linux · NO FIX YET

Ubuntu 20.04 · linux-hwe-5.15 · FIXED · 5.15.0-198.208~20.04.1

sudo apt update && sudo apt install --only-upgrade linux-hwe-5.15 dpkg --compare-versions "$(dpkg-query -W -f='${Version}' linux-hwe-5.15)" ge "5.15.0-198.208~20.04.1" && echo PATCHED || echo STILL-VULNERABLE

Ubuntu 22.04 · linux-hwe-6.8 · NO FIX YET

Debian 12 · linux · FIXED · 6.1.187-1

sudo apt update && sudo apt install --only-upgrade linux dpkg --compare-versions "$(dpkg-query -W -f='${Version}' linux)" ge "6.1.187-1" && echo PATCHED || echo STILL-VULNERABLE

Debian 13 · linux · FIXED · 6.12.105-1

sudo apt update && sudo apt install --only-upgrade linux dpkg --compare-versions "$(dpkg-query -W -f='${Version}' linux)" ge "6.12.105-1" && echo PATCHED || echo STILL-VULNERABLE

Debian 12 · linux-6.12 · FIXED · 6.12.107-1~deb12u1

sudo apt update && sudo apt install --only-upgrade linux-6.12 dpkg --compare-versions "$(dpkg-query -W -f='${Version}' linux-6.12)" ge "6.12.107-1~deb12u1" && echo PATCHED || echo STILL-VULNERABLE

RHEL 10 · kernel · FIXED · kernel-6.12.0-211.59.1.el10_2

sudo dnf upgrade --advisory=RHSA-2026:71233 rpm -q kernel

RHEL 10.0 Extended Update Support · kernel · FIXED · kernel-6.12.0-55.107.1.el10_0

sudo dnf upgrade --advisory=RHSA-2026:71599 rpm -q kernel

RHEL 7 Extended Lifecycle Support · kernel-rt · FIXED · kernel-rt-3.10.0-1160.164.1.rt56.1316.el7

sudo dnf upgrade --advisory=RHSA-2026:71657 rpm -q kernel-rt

RHEL 7 Extended Lifecycle Support · kernel · FIXED · kernel-3.10.0-1160.164.1.el7

sudo dnf upgrade --advisory=RHSA-2026:71687 rpm -q kernel

RHEL 8 · kernel · FIXED · kernel-4.18.0-553.167.1.el8_10

sudo dnf upgrade --advisory=RHSA-2026:71213 rpm -q kernel

Amazon Linux 2023 · see advisory · FIXED · ALAS2023-2026-2143 · source

sudo dnf update --advisory=ALAS2023-2026-2143

Amazon Linux 2 · see advisory · FIXED · ALAS2-2026-3929 · source

sudo yum update --advisory=ALAS2-2026-3929

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

GitHub PoC: suominen/diagspill (0 stars)
GitHub PoC: 0xBlackash/CVE-2026-74469 (0 stars)
GitHub PoC: HORKimhab/CVE-2026-74469 (0 stars)

Advisories and coverage

Official advisories

Amazon Linux 2 ALAS: ALAS2KERNEL-5.4-2026-130 (important): kernel 2026-09-18
Amazon Linux 2 ALAS: ALAS2-2026-3929 (important): kernel 2026-09-18

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-74469?

No fixed release is listed yet. Watch the vendor advisory and apply any mitigation shown on this page.

Is CVE-2026-74469 being exploited?

CVE-2026-74469 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-74469 affect?

CVE-2026-74469 affects affected software. Severity is high (CVSS 8.8). 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 trans

How urgent is CVE-2026-74469?

Priority 54/100. High severity; On your watchlist

Software pages

Linux kernel vulnerabilities

References

← Back to latest CVEs