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CVE-2026-74469· NVD / CVE Program· CNA Linux

sctp: prevent peer transport count overflow

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.

HighCVSS 8.8 · v3.1—Proof of concept Fix available

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Published
Aug 15, 2026
Updated
Aug 19, 2026
EPSS
1.1% · 64th percentile
CWE
—
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Report tools

JSON

Action score

35

Monitor

Low priority for now.

CVSS
35 / 40 · 8.8 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 1.1%

CNA vs NVD score

NVD
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CNA · Linux
8.8
NVD has not scored this yet; the score shown is the CNA’s.

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Affected systems

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Versions reported by the vendor

Affected version ranges reported by the assigning authority (Linux). Independent of NVD's CPE analysis and usually ahead of it.

  • Linux Linux

    • 4.7affected
    • 8f840e47f190cbe61a96945c13e9551048d42cef and later · before b453e00da1211e997b82743d28af7714c59c05c8affected · git
    • 8f840e47f190cbe61a96945c13e9551048d42cef and later · before dfea32dd76f390e3155177b0038cc47b01386198affected · git
    • 8f840e47f190cbe61a96945c13e9551048d42cef and later · before 80f48523a0fe42db2e7375dff4e38a25c117090aaffected · git
    • 8f840e47f190cbe61a96945c13e9551048d42cef and later · before 546221b86ceeba0d8fec92d46a0604bb7b62be07affected · git
    • 8f840e47f190cbe61a96945c13e9551048d42cef and later · before 09e722030e8148ba4ed1e42c6b2ea57bda9f9895affected · git
    • 8f840e47f190cbe61a96945c13e9551048d42cef and later · before 4ba5bf7ed50f235ea4581de8e7a0002f4ed287b0affected · git
    • 8f840e47f190cbe61a96945c13e9551048d42cef and later · before 6201cd1d70f1670c5b31ac506e7ab2fa7b8e7f75affected · git
    • 8f840e47f190cbe61a96945c13e9551048d42cef and later · before bd0e9289e2642f6a5c54faad304ce0f41e926d22affected · git
    • before 4.7not affected · semver

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.187-16.1.187-1
Debian:12linux-6.12before 6.12.107-1~deb12u16.12.107-1~deb12u1
Debian:13linuxbefore 6.12.105-16.12.105-1
Debian:14linuxbefore 7.1.8-17.1.8-1
Red Hat:enterprise_linux_eus:10.0kernelbefore 0:6.12.0-55.107.1.el10_00:6.12.0-55.107.1.el10_0
Red Hat:enterprise_linux_eus:10.0kernel-64kbefore 0:6.12.0-55.107.1.el10_00:6.12.0-55.107.1.el10_0
Red Hat:enterprise_linux_eus:10.0kernel-64k-corebefore 0:6.12.0-55.107.1.el10_00:6.12.0-55.107.1.el10_0
Red Hat:enterprise_linux_eus:10.0kernel-64k-debugbefore 0:6.12.0-55.107.1.el10_00:6.12.0-55.107.1.el10_0
Red Hat:enterprise_linux_eus:10.0kernel-64k-debug-corebefore 0:6.12.0-55.107.1.el10_00:6.12.0-55.107.1.el10_0
Red Hat:enterprise_linux_eus:10.0kernel-64k-debug-debuginfobefore 0:6.12.0-55.107.1.el10_00:6.12.0-55.107.1.el10_0
Red Hat:enterprise_linux_eus:10.0kernel-64k-debug-develbefore 0:6.12.0-55.107.1.el10_00:6.12.0-55.107.1.el10_0
Red Hat:enterprise_linux_eus:10.0kernel-64k-debug-devel-matchedbefore 0:6.12.0-55.107.1.el10_00:6.12.0-55.107.1.el10_0
Red Hat:enterprise_linux_eus:10.0kernel-64k-debug-modulesbefore 0:6.12.0-55.107.1.el10_00:6.12.0-55.107.1.el10_0
Red Hat:enterprise_linux_eus:10.0kernel-64k-debug-modules-corebefore 0:6.12.0-55.107.1.el10_00:6.12.0-55.107.1.el10_0
Red Hat:enterprise_linux_eus:10.0kernel-64k-debug-modules-extrabefore 0:6.12.0-55.107.1.el10_00:6.12.0-55.107.1.el10_0
Red Hat:enterprise_linux_eus:10.0kernel-64k-debuginfobefore 0:6.12.0-55.107.1.el10_00:6.12.0-55.107.1.el10_0
Red Hat:enterprise_linux_eus:10.0kernel-64k-develbefore 0:6.12.0-55.107.1.el10_00:6.12.0-55.107.1.el10_0
Red Hat:enterprise_linux_eus:10.0kernel-64k-devel-matchedbefore 0:6.12.0-55.107.1.el10_00:6.12.0-55.107.1.el10_0
Red Hat:enterprise_linux_eus:10.0kernel-64k-modulesbefore 0:6.12.0-55.107.1.el10_00:6.12.0-55.107.1.el10_0
Red Hat:enterprise_linux_eus:10.0kernel-64k-modules-corebefore 0:6.12.0-55.107.1.el10_00:6.12.0-55.107.1.el10_0
Red Hat:enterprise_linux_eus:10.0kernel-64k-modules-extrabefore 0:6.12.0-55.107.1.el10_00:6.12.0-55.107.1.el10_0
Red Hat:enterprise_linux_eus:10.0kernel-abi-stablelistsbefore 0:6.12.0-55.107.1.el10_00:6.12.0-55.107.1.el10_0
Red Hat:enterprise_linux_eus:10.0kernel-corebefore 0:6.12.0-55.107.1.el10_00:6.12.0-55.107.1.el10_0
Red Hat:enterprise_linux_eus:10.0kernel-debugbefore 0:6.12.0-55.107.1.el10_00:6.12.0-55.107.1.el10_0

+96

Same product

linux: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-74705udp: fix potential use-after-free in tunnel segmentation
    40Plan
  • CVE-2026-74612veth: fix skb length accounting after XDP frag adjustment
    40Plan
  • CVE-2026-74475vxlan: use neigh_ha_snapshot() in route_shortcircuit()
    40Plan
  • CVE-2026-74309vdpa/octeon_ep: fix IRQ-to-ring mapping in interrupt handler
    40Plan
  • CVE-2026-74280crypto: marvell/octeontx - fix DMA cleanup using wrong loop index
    40Plan
  • CVE-2026-74279crypto: cavium/cpt - fix DMA cleanup using wrong loop index
    40Plan

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
Linux Linux09e722030e8148ba4ed1e42c6b2ea57bda9f9895Vendor (CNA)
Linux Linux4ba5bf7ed50f235ea4581de8e7a0002f4ed287b0Vendor (CNA)
Linux Linux546221b86ceeba0d8fec92d46a0604bb7b62be07Vendor (CNA)
Linux Linux6201cd1d70f1670c5b31ac506e7ab2fa7b8e7f75Vendor (CNA)
Linux Linux80f48523a0fe42db2e7375dff4e38a25c117090aVendor (CNA)
Linux Linuxb453e00da1211e997b82743d28af7714c59c05c8Vendor (CNA)
Linux Linuxbd0e9289e2642f6a5c54faad304ce0f41e926d22Vendor (CNA)
Linux Linuxdfea32dd76f390e3155177b0038cc47b01386198Vendor (CNA)
azl3 kernel 6.6.150.1-1 on Azure Linux 3.06.6.152.1-1 · Release NotesMicrosoft (MSRC)
debian:linux6.1.187-1 · Debian:12Package registry (OSV)
debian:linux-6.126.12.107-1~deb12u1 · Debian:12Package registry (OSV)
red hat:bpftool0:4.18.0-305.209.1.el8_4 · Red Hat:rhel_aus:8.4::baseosPackage registry (OSV)
red hat:bpftool-debuginfo0:4.18.0-305.209.1.el8_4 · Red Hat:rhel_aus:8.4::baseosPackage registry (OSV)
red hat:kernel0:4.18.0-305.209.1.el8_4 · Red Hat:rhel_aus:8.4::baseosPackage registry (OSV)
red hat:kernel-abi-stablelists0:4.18.0-305.209.1.el8_4 · Red Hat:rhel_aus:8.4::baseosPackage registry (OSV)
red hat:kernel-core0:4.18.0-305.209.1.el8_4 · Red Hat:rhel_aus:8.4::baseosPackage registry (OSV)
red hat:kernel-debug0:4.18.0-305.209.1.el8_4 · Red Hat:rhel_aus:8.4::baseosPackage registry (OSV)
red hat:kernel-debug-core0:4.18.0-305.209.1.el8_4 · Red Hat:rhel_aus:8.4::baseosPackage registry (OSV)
red hat:kernel-debug-debuginfo0:4.18.0-305.209.1.el8_4 · Red Hat:rhel_aus:8.4::baseosPackage registry (OSV)
red hat:kernel-debug-devel0:4.18.0-305.209.1.el8_4 · Red Hat:rhel_aus:8.4::baseosPackage registry (OSV)
red hat:kernel-debug-modules0:4.18.0-305.209.1.el8_4 · Red Hat:rhel_aus:8.4::baseosPackage registry (OSV)
red hat:kernel-debug-modules-extra0:4.18.0-305.209.1.el8_4 · Red Hat:rhel_aus:8.4::baseosPackage registry (OSV)
red hat:kernel-debuginfo0:4.18.0-305.209.1.el8_4 · Red Hat:rhel_aus:8.4::baseosPackage registry (OSV)

Exploit status

Proof of concept available

A public proof of concept or detection signature exists. Exploit knowledge is out there; don't delay patching.

Evidence

  • Proof-of-concept repository on GitHub ×3

Noroxi does not host or link to exploit code. Metasploit module names and Nuclei template ids are shown (names, not code); Exploit-DB entries and PoC repositories are given as counts only.

Public exploit evidence
SourceKindDate
Proof-of-concept repository on GitHubstars:02026-09-18
Proof-of-concept repository on GitHubstars:02026-09-19
Proof-of-concept repository on GitHubstars:02026-09-21

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

  1. Published
  2. First PoC+34 d
  3. TodaySep 30, 2026+47 d
EPSS, last 120 days+1% in 7 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

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Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • A low-privileged account is enough.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
high · data can be read
Integrity
high · data or configuration can be modified
Availability
high · the service can be disrupted
Attack vector
Network
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
High
Availability impact
High

Weakness class (CWE)

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CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

nvd-secondary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records