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Vulnerability · Published Aug 15, 2026 · Assigned by Linux

CVE-2026-74469sctp: prevent peer transport count overflow

High 8.8

In plain English

A high-severity security flaw in Linux from Linux. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.5% (higher than 74% of all known vulnerabilities). Ready-made attack tooling exists: public proof-of-concept code. Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)8.8High
Exploit odds (30 days)1.5%top 26.2% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack tooling1Public PoC

Official description

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.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
AlmaLinux:8bpftool4.18.0-553.167.1.el8_10ALSA-2026:71213
AlmaLinux:8kernel4.18.0-553.167.1.el8_10ALSA-2026:71213
AlmaLinux:9kernel5.14.0-687.51.1.el9_8ALSA-2026:71232
AlmaLinux:9kernel-64k5.14.0-687.51.1.el9_8ALSA-2026:71232
AlmaLinux:9kernel-64k-core5.14.0-687.51.1.el9_8ALSA-2026:71232
AlmaLinux:9kernel-64k-debug5.14.0-687.51.1.el9_8ALSA-2026:71232
AlmaLinux:9kernel-64k-debug-core5.14.0-687.51.1.el9_8ALSA-2026:71232
AlmaLinux:10kernel-64k-debug-devel6.12.0-211.59.1.el10_2ALSA-2026:71233
AlmaLinux:10kernel-64k-debug-devel-matched6.12.0-211.59.1.el10_2ALSA-2026:71233
AlmaLinux:9kernel-64k-debug-modules5.14.0-687.51.1.el9_8ALSA-2026:71232
AlmaLinux:9kernel-64k-debug-modules-core5.14.0-687.51.1.el9_8ALSA-2026:71232
AlmaLinux:9kernel-64k-debug-modules-extra5.14.0-687.51.1.el9_8ALSA-2026:71232
AlmaLinux:10kernel-64k-devel6.12.0-211.59.1.el10_2ALSA-2026:71233
AlmaLinux:10kernel-64k-devel-matched6.12.0-211.59.1.el10_2ALSA-2026:71233
AlmaLinux:9kernel-64k-modules5.14.0-687.51.1.el9_8ALSA-2026:71232
AlmaLinux:9kernel-64k-modules-core5.14.0-687.51.1.el9_8ALSA-2026:71232
AlmaLinux:9kernel-64k-modules-extra5.14.0-687.51.1.el9_8ALSA-2026:71232
AlmaLinux:8kernel-abi-stablelists4.18.0-553.167.1.el8_10ALSA-2026:71213
AlmaLinux:9kernel-abi-stablelists5.14.0-687.51.1.el9_8ALSA-2026:71232
AlmaLinux:8kernel-core4.18.0-553.167.1.el8_10ALSA-2026:71213
AlmaLinux:9kernel-core5.14.0-687.51.1.el9_8ALSA-2026:71232
AlmaLinux:8kernel-cross-headers4.18.0-553.167.1.el8_10ALSA-2026:71213
AlmaLinux:8kernel-debug4.18.0-553.167.1.el8_10ALSA-2026:71213
AlmaLinux:9kernel-debug5.14.0-687.51.1.el9_8ALSA-2026:71232
AlmaLinux:8kernel-debug-core4.18.0-553.167.1.el8_10ALSA-2026:71213
AlmaLinux:9kernel-debug-core5.14.0-687.51.1.el9_8ALSA-2026:71232
AlmaLinux:10kernel-debug-devel6.12.0-211.59.1.el10_2ALSA-2026:71233
AlmaLinux:8kernel-debug-devel4.18.0-553.167.1.el8_10ALSA-2026:71213
AlmaLinux:10kernel-debug-devel-matched6.12.0-211.59.1.el10_2ALSA-2026:71233
AlmaLinux:8kernel-debug-modules4.18.0-553.167.1.el8_10ALSA-2026:71213
AlmaLinux:9kernel-debug-modules5.14.0-687.51.1.el9_8ALSA-2026:71232
AlmaLinux:9kernel-debug-modules-core5.14.0-687.51.1.el9_8ALSA-2026:71232
AlmaLinux:8kernel-debug-modules-extra4.18.0-553.167.1.el8_10ALSA-2026:71213
AlmaLinux:10kernel-devel6.12.0-211.59.1.el10_2ALSA-2026:71233
AlmaLinux:8kernel-devel4.18.0-553.167.1.el8_10ALSA-2026:71213
AlmaLinux:10kernel-devel-matched6.12.0-211.59.1.el10_2ALSA-2026:71233
AlmaLinux:10kernel-doc6.12.0-211.59.1.el10_2ALSA-2026:71233
AlmaLinux:8kernel-doc4.18.0-553.167.1.el8_10ALSA-2026:71213
AlmaLinux:10kernel-headers6.12.0-211.59.1.el10_2ALSA-2026:71233
AlmaLinux:8kernel-headers4.18.0-553.167.1.el8_10ALSA-2026:71213
AlmaLinux:8kernel-modules4.18.0-553.167.1.el8_10ALSA-2026:71213
AlmaLinux:8kernel-modules-extra4.18.0-553.167.1.el8_10ALSA-2026:71213
AlmaLinux:8kernel-tools4.18.0-553.167.1.el8_10ALSA-2026:71213
AlmaLinux:8kernel-tools-libs4.18.0-553.167.1.el8_10ALSA-2026:71213
AlmaLinux:8kernel-tools-libs-devel4.18.0-553.167.1.el8_10ALSA-2026:71213
AlmaLinux:8kernel-zfcpdump4.18.0-553.167.1.el8_10ALSA-2026:71213
AlmaLinux:8kernel-zfcpdump-core4.18.0-553.167.1.el8_10ALSA-2026:71213
AlmaLinux:10kernel-zfcpdump-devel6.12.0-211.59.1.el10_2ALSA-2026:71233
AlmaLinux:8kernel-zfcpdump-devel4.18.0-553.167.1.el8_10ALSA-2026:71213
AlmaLinux:10kernel-zfcpdump-devel-matched6.12.0-211.59.1.el10_2ALSA-2026:71233
AlmaLinux:8kernel-zfcpdump-modules4.18.0-553.167.1.el8_10ALSA-2026:71213
AlmaLinux:8kernel-zfcpdump-modules-extra4.18.0-553.167.1.el8_10ALSA-2026:71213
AlmaLinux:10perf6.12.0-211.59.1.el10_2ALSA-2026:71233
AlmaLinux:8perf4.18.0-553.167.1.el8_10ALSA-2026:71213
AlmaLinux:10python3-perf6.12.0-211.59.1.el10_2ALSA-2026:71233
AlmaLinux:8python3-perf4.18.0-553.167.1.el8_10ALSA-2026:71213
Debian:12linux6.1.187-1DEBIAN-CVE-2026-74469
Debian:13linux6.12.105-1DEBIAN-CVE-2026-74469
Debian:14linux7.1.8-1DEBIAN-CVE-2026-74469
Debian:12linux-6.126.12.107-1~deb12u1DEBIAN-CVE-2026-74469
Ubuntu:22.04:LTSlinux5.15.0-198.208UBUNTU-CVE-2026-74469
Ubuntu:24.04:LTSlinuxno fix listedUBUNTU-CVE-2026-74469
Ubuntu:26.04:LTSlinux7.0.0-42.42UBUNTU-CVE-2026-74469
Ubuntu:26.04:LTSlinux7.0.0-42.42USN-8959-1
Ubuntu:22.04:LTSlinux-allwinner-5.19no fix listedUBUNTU-CVE-2026-74469
Ubuntu:22.04:LTSlinux-aws5.15.0-1117.124UBUNTU-CVE-2026-74469
Ubuntu:24.04:LTSlinux-awsno fix listedUBUNTU-CVE-2026-74469
Ubuntu:26.04:LTSlinux-aws7.0.0-1016.17UBUNTU-CVE-2026-74469
Ubuntu:26.04:LTSlinux-aws7.0.0-1016.17USN-8959-1
Ubuntu:22.04:LTSlinux-aws-5.19no fix listedUBUNTU-CVE-2026-74469
Ubuntu:24.04:LTSlinux-aws-6.14no fix listedUBUNTU-CVE-2026-74469
Ubuntu:24.04:LTSlinux-aws-6.17no fix listedUBUNTU-CVE-2026-74469
Ubuntu:22.04:LTSlinux-aws-6.2no fix listedUBUNTU-CVE-2026-74469
Ubuntu:22.04:LTSlinux-aws-6.5no fix listedUBUNTU-CVE-2026-74469
Ubuntu:22.04:LTSlinux-aws-6.8no fix listedUBUNTU-CVE-2026-74469
Ubuntu:24.04:LTSlinux-aws-7.0no fix listedUBUNTU-CVE-2026-74469
Ubuntu:22.04:LTSlinux-azure5.15.0-1123.132UBUNTU-CVE-2026-74469
Ubuntu:24.04:LTSlinux-azureno fix listedUBUNTU-CVE-2026-74469
Ubuntu:26.04:LTSlinux-azureno fix listedUBUNTU-CVE-2026-74469
Ubuntu:22.04:LTSlinux-azure-5.19no fix listedUBUNTU-CVE-2026-74469
Ubuntu:24.04:LTSlinux-azure-6.11no fix listedUBUNTU-CVE-2026-74469
Ubuntu:24.04:LTSlinux-azure-6.14no fix listedUBUNTU-CVE-2026-74469
Ubuntu:24.04:LTSlinux-azure-6.17no fix listedUBUNTU-CVE-2026-74469
Ubuntu:22.04:LTSlinux-azure-6.2no fix listedUBUNTU-CVE-2026-74469
Ubuntu:22.04:LTSlinux-azure-6.5no fix listedUBUNTU-CVE-2026-74469
Ubuntu:22.04:LTSlinux-azure-6.8no fix listedUBUNTU-CVE-2026-74469
Ubuntu:24.04:LTSlinux-azure-7.0no fix listedUBUNTU-CVE-2026-74469
Ubuntu:22.04:LTSlinux-azure-fde5.15.0-1122.131UBUNTU-CVE-2026-74469
Ubuntu:24.04:LTSlinux-azure-fdeno fix listedUBUNTU-CVE-2026-74469
Ubuntu:26.04:LTSlinux-azure-fdeno fix listedUBUNTU-CVE-2026-74469
Ubuntu:22.04:LTSlinux-azure-fde-5.19no fix listedUBUNTU-CVE-2026-74469
Ubuntu:24.04:LTSlinux-azure-fde-6.14no fix listedUBUNTU-CVE-2026-74469
Ubuntu:24.04:LTSlinux-azure-fde-6.17no fix listedUBUNTU-CVE-2026-74469
Ubuntu:22.04:LTSlinux-azure-fde-6.2no fix listedUBUNTU-CVE-2026-74469
Ubuntu:22.04:LTSlinux-azure-fde-6.8no fix listedUBUNTU-CVE-2026-74469
Ubuntu:24.04:LTSlinux-azure-fde-7.0no fix listedUBUNTU-CVE-2026-74469
Ubuntu:24.04:LTSlinux-azure-nvidiano fix listedUBUNTU-CVE-2026-74469
Ubuntu:24.04:LTSlinux-azure-nvidia-6.14no fix listedUBUNTU-CVE-2026-74469
Ubuntu:22.04:LTSlinux-gcp5.15.0-1118.128UBUNTU-CVE-2026-74469
Ubuntu:24.04:LTSlinux-gcpno fix listedUBUNTU-CVE-2026-74469
Ubuntu:26.04:LTSlinux-gcp7.0.0-1016.18USN-8959-1
Ubuntu:26.04:LTSlinux-gcp7.0.0-1016.18UBUNTU-CVE-2026-74469
Ubuntu:22.04:LTSlinux-gcp-5.19no fix listedUBUNTU-CVE-2026-74469
Ubuntu:24.04:LTSlinux-gcp-6.11no fix listedUBUNTU-CVE-2026-74469
Ubuntu:24.04:LTSlinux-gcp-6.14no fix listedUBUNTU-CVE-2026-74469
Ubuntu:24.04:LTSlinux-gcp-6.17no fix listedUBUNTU-CVE-2026-74469
Ubuntu:22.04:LTSlinux-gcp-6.2no fix listedUBUNTU-CVE-2026-74469
Ubuntu:22.04:LTSlinux-gcp-6.5no fix listedUBUNTU-CVE-2026-74469
Ubuntu:22.04:LTSlinux-gcp-6.8no fix listedUBUNTU-CVE-2026-74469
Ubuntu:24.04:LTSlinux-gcp-7.0no fix listedUBUNTU-CVE-2026-74469
Ubuntu:22.04:LTSlinux-gke5.15.0-1113.119UBUNTU-CVE-2026-74469
Ubuntu:24.04:LTSlinux-gkeno fix listedUBUNTU-CVE-2026-74469
Ubuntu:26.04:LTSlinux-gkeno fix listedUBUNTU-CVE-2026-74469
Ubuntu:22.04:LTSlinux-gkeop5.15.0-1100.108UBUNTU-CVE-2026-74469
Ubuntu:24.04:LTSlinux-gkeopno fix listedUBUNTU-CVE-2026-74469
Ubuntu:22.04:LTSlinux-hwe-5.19no fix listedUBUNTU-CVE-2026-74469
Ubuntu:24.04:LTSlinux-hwe-6.11no fix listedUBUNTU-CVE-2026-74469
Ubuntu:24.04:LTSlinux-hwe-6.14no fix listedUBUNTU-CVE-2026-74469
Ubuntu:24.04:LTSlinux-hwe-6.17no fix listedUBUNTU-CVE-2026-74469
Ubuntu:22.04:LTSlinux-hwe-6.2no fix listedUBUNTU-CVE-2026-74469
Ubuntu:22.04:LTSlinux-hwe-6.5no fix listedUBUNTU-CVE-2026-74469
Ubuntu:22.04:LTSlinux-hwe-6.8no fix listedUBUNTU-CVE-2026-74469
Ubuntu:24.04:LTSlinux-hwe-7.07.0.0-42.42~24.04.1USN-8959-1
Ubuntu:24.04:LTSlinux-hwe-7.07.0.0-42.42~24.04.1UBUNTU-CVE-2026-74469
Ubuntu:22.04:LTSlinux-ibm5.15.0-1111.115UBUNTU-CVE-2026-74469
Ubuntu:24.04:LTSlinux-ibmno fix listedUBUNTU-CVE-2026-74469
Ubuntu:26.04:LTSlinux-ibm7.0.0-1017.17UBUNTU-CVE-2026-74469
Ubuntu:26.04:LTSlinux-ibm7.0.0-1017.17USN-8959-1
Ubuntu:22.04:LTSlinux-ibm-6.8no fix listedUBUNTU-CVE-2026-74469
Ubuntu:22.04:LTSlinux-intel-iot-realtimeno fix listedUBUNTU-CVE-2026-74469
Ubuntu:22.04:LTSlinux-intel-iotg5.15.0-1112.118UBUNTU-CVE-2026-74469
Ubuntu:22.04:LTSlinux-kvm5.15.0-1109.114UBUNTU-CVE-2026-74469
Ubuntu:22.04:LTSlinux-lowlatency5.15.0-195.205UBUNTU-CVE-2026-74469
Ubuntu:24.04:LTSlinux-lowlatencyno fix listedUBUNTU-CVE-2026-74469
Ubuntu:22.04:LTSlinux-lowlatency-hwe-5.19no fix listedUBUNTU-CVE-2026-74469
Ubuntu:24.04:LTSlinux-lowlatency-hwe-6.11no fix listedUBUNTU-CVE-2026-74469
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.2no fix listedUBUNTU-CVE-2026-74469
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.5no fix listedUBUNTU-CVE-2026-74469
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.8no fix listedUBUNTU-CVE-2026-74469
Ubuntu:22.04:LTSlinux-nvidia5.15.0-1112.113UBUNTU-CVE-2026-74469
Ubuntu:24.04:LTSlinux-nvidiano fix listedUBUNTU-CVE-2026-74469
Ubuntu:26.04:LTSlinux-nvidiano fix listedUBUNTU-CVE-2026-74469
Ubuntu:24.04:LTSlinux-nvidia-6.11no fix listedUBUNTU-CVE-2026-74469
Ubuntu:24.04:LTSlinux-nvidia-6.17no fix listedUBUNTU-CVE-2026-74469
Ubuntu:22.04:LTSlinux-nvidia-6.2no fix listedUBUNTU-CVE-2026-74469
Ubuntu:22.04:LTSlinux-nvidia-6.5no fix listedUBUNTU-CVE-2026-74469
Ubuntu:22.04:LTSlinux-nvidia-6.8no fix listedUBUNTU-CVE-2026-74469
Ubuntu:24.04:LTSlinux-nvidia-7.0no fix listedUBUNTU-CVE-2026-74469
Ubuntu:26.04:LTSlinux-nvidia-bosno fix listedUBUNTU-CVE-2026-74469
Ubuntu:24.04:LTSlinux-nvidia-lowlatencyno fix listedUBUNTU-CVE-2026-74469
Ubuntu:22.04:LTSlinux-nvidia-tegra5.15.0-1070.72UBUNTU-CVE-2026-74469
Ubuntu:24.04:LTSlinux-nvidia-tegra6.8.0-1036.39UBUNTU-CVE-2026-74469
Ubuntu:22.04:LTSlinux-nvidia-tegra-igx5.15.0-1059.59UBUNTU-CVE-2026-74469
Ubuntu:22.04:LTSlinux-oem-5.17no fix listedUBUNTU-CVE-2026-74469
Ubuntu:22.04:LTSlinux-oem-6.0no fix listedUBUNTU-CVE-2026-74469
Ubuntu:22.04:LTSlinux-oem-6.1no fix listedUBUNTU-CVE-2026-74469
Ubuntu:24.04:LTSlinux-oem-6.11no fix listedUBUNTU-CVE-2026-74469
Ubuntu:24.04:LTSlinux-oem-6.14no fix listedUBUNTU-CVE-2026-74469
Ubuntu:24.04:LTSlinux-oem-6.17no fix listedUBUNTU-CVE-2026-74469
Ubuntu:22.04:LTSlinux-oem-6.5no fix listedUBUNTU-CVE-2026-74469
Ubuntu:24.04:LTSlinux-oem-6.8no fix listedUBUNTU-CVE-2026-74469
Ubuntu:26.04:LTSlinux-oem-7.07.0.0-1017.17UBUNTU-CVE-2026-74469
Ubuntu:26.04:LTSlinux-oem-7.07.0.0-1017.17USN-8960-1
Ubuntu:22.04:LTSlinux-oracle5.15.0-1114.120UBUNTU-CVE-2026-74469
Ubuntu:24.04:LTSlinux-oracleno fix listedUBUNTU-CVE-2026-74469
Ubuntu:26.04:LTSlinux-oracle7.0.0-1015.16USN-8959-1
Ubuntu:26.04:LTSlinux-oracle7.0.0-1015.16UBUNTU-CVE-2026-74469
Ubuntu:24.04:LTSlinux-oracle-6.14no fix listedUBUNTU-CVE-2026-74469
Ubuntu:24.04:LTSlinux-oracle-6.17no fix listedUBUNTU-CVE-2026-74469
Ubuntu:22.04:LTSlinux-oracle-6.5no fix listedUBUNTU-CVE-2026-74469
Ubuntu:22.04:LTSlinux-oracle-6.8no fix listedUBUNTU-CVE-2026-74469
Ubuntu:24.04:LTSlinux-oracle-7.0no fix listedUBUNTU-CVE-2026-74469
Ubuntu:22.04:LTSlinux-raspino fix listedUBUNTU-CVE-2026-74469
Ubuntu:24.04:LTSlinux-raspino fix listedUBUNTU-CVE-2026-74469
Ubuntu:26.04:LTSlinux-raspino fix listedUBUNTU-CVE-2026-74469
Ubuntu:24.04:LTSlinux-raspi-realtimeno fix listedUBUNTU-CVE-2026-74469
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2026-74469
Ubuntu:24.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2026-74469
Ubuntu:26.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2026-74469
Ubuntu:22.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2026-74469
Ubuntu:24.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2026-74469
Ubuntu:26.04:LTSlinux-riscv7.0.0-42.42.1UBUNTU-CVE-2026-74469
Ubuntu:22.04:LTSlinux-riscv-5.19no fix listedUBUNTU-CVE-2026-74469
Ubuntu:24.04:LTSlinux-riscv-6.14no fix listedUBUNTU-CVE-2026-74469
Ubuntu:24.04:LTSlinux-riscv-6.17no fix listedUBUNTU-CVE-2026-74469
Ubuntu:22.04:LTSlinux-riscv-6.5no fix listedUBUNTU-CVE-2026-74469
Ubuntu:22.04:LTSlinux-riscv-6.8no fix listedUBUNTU-CVE-2026-74469
Ubuntu:24.04:LTSlinux-riscv-7.07.0.0-42.42.1~24.04.1UBUNTU-CVE-2026-74469
Ubuntu:22.04:LTSlinux-starfive-5.19no fix listedUBUNTU-CVE-2026-74469
Ubuntu:22.04:LTSlinux-starfive-6.2no fix listedUBUNTU-CVE-2026-74469
Ubuntu:22.04:LTSlinux-starfive-6.5no fix listedUBUNTU-CVE-2026-74469
Ubuntu:24.04:LTSlinux-vmwareno fix listedUBUNTU-CVE-2026-74469
Ubuntu:24.04:LTSlinux-xilinxno fix listedUBUNTU-CVE-2026-74469
Ubuntu:22.04:LTSlinux-xilinx-zynqmp5.15.0-1080.84UBUNTU-CVE-2026-74469

Affected products (as reported)

VendorProductVersions
Linux Linux 8f840e47f190cbe61a96945c13e9551048d42cef – before b453e00da1211e997b82743d28af7714c59c05c88f840e47f190cbe61a96945c13e9551048d42cef – before dfea32dd76f390e3155177b0038cc47b013861988f840e47f190cbe61a96945c13e9551048d42cef – before 80f48523a0fe42db2e7375dff4e38a25c117090a8f840e47f190cbe61a96945c13e9551048d42cef – before 546221b86ceeba0d8fec92d46a0604bb7b62be078f840e47f190cbe61a96945c13e9551048d42cef – before 09e722030e8148ba4ed1e42c6b2ea57bda9f98958f840e47f190cbe61a96945c13e9551048d42cef – before 4ba5bf7ed50f235ea4581de8e7a0002f4ed287b08f840e47f190cbe61a96945c13e9551048d42cef – before 6201cd1d70f1670c5b31ac506e7ab2fa7b8e7f758f840e47f190cbe61a96945c13e9551048d42cef – before bd0e9289e2642f6a5c54faad304ce0f41e926d22
Linux Linux 4.7

References