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.
CVSS Details
- CVSS 3.1 Base Score: 8.8
- CVSS 3.1 Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Amazon_linux_2023 | — | Upgrade bpftool6.12Upgrade kernel6.18-debuginfo-common-aarch64Upgrade kernel6.18-debuginfo-common-x86_64Upgrade kernel-livepatch-6.12.103-127.188Upgrade kernel6.12-headersUpgrade bpftool6.12-debuginfoUpgrade bpftool6.18Upgrade perf6.12Upgrade kernel6.12Upgrade python3-perf6.18Upgrade bpftool6.18-debuginfoUpgrade kernel6.18-debuginfoUpgrade kernel6.18-develUpgrade kernel6.12-toolsUpgrade kernel6.18-modules-extra-commonUpgrade kernel6.12-debuginfo-common-aarch64Upgrade kernel6.12-tools-debuginfoUpgrade kernel6.18-headersUpgrade kernel6.18Upgrade perf6.18-debuginfoUpgrade kernel6.12-develUpgrade kernel6.18-toolsUpgrade kernel6.18-modules-extraUpgrade kernel-livepatch-6.18.44-99.149Upgrade kernel6.12-debuginfo-common-x86_64Upgrade perf6.18Upgrade python3-perf6.12-debuginfoUpgrade python3-perf6.18-debuginfoUpgrade python3-perf6.12Upgrade perf6.12-debuginfoUpgrade kernel6.12-tools-develUpgrade kernel6.12-modules-extra-commonUpgrade kernel6.12-debuginfoUpgrade kernel6.18-tools-debuginfoUpgrade microvm-kernel6.18Upgrade kernel6.18-tools-develUpgrade kernel6.12-modules-extra | Sep 1, 2026 | Aug 15, 2026 |
| Debian | — | Upgrade linux-6.12Upgrade linux | Aug 26, 2026 | Aug 26, 2026 |
| Redhat_linux | — | Upgrade kernel-rtNo solution existsUpgrade kernel | Sep 2, 2026 | Aug 15, 2026 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Aug 21, 2026 | Aug 15, 2026 |
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