GHSA-772M-42GR-VC4C
Vulnerability from github – Published: 2026-08-15 15:30 – Updated: 2026-08-19 18:32In 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": [],
"aliases": [
"CVE-2026-74469"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-08-15T13:17:51Z",
"severity": "HIGH"
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nsctp: prevent peer transport count overflow\n\nsctp_assoc_add_peer() increments the association\u0027s 16-bit transport_count\nfor every new unique peer. Adding the 65,536th transport wraps the count to\nzero.\n\nSCTP sock_diag uses transport_count to reserve the INET_DIAG_PEERS payload,\nthen copies one sockaddr_storage for every entry in transport_addr_list.\nAfter the wrap, a diagnostic dump reserves an empty payload and writes\n8 MiB of peer addresses past the skb tail.\n\nReject a new unique peer when transport_count has reached U16_MAX. Perform\nthe check after the existing-peer lookup so a duplicate address continues\nto return its existing transport at the limit.",
"id": "GHSA-772m-42gr-vc4c",
"modified": "2026-08-19T18:32:28Z",
"published": "2026-08-15T15:30:33Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-74469"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/09e722030e8148ba4ed1e42c6b2ea57bda9f9895"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/4ba5bf7ed50f235ea4581de8e7a0002f4ed287b0"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/546221b86ceeba0d8fec92d46a0604bb7b62be07"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/6201cd1d70f1670c5b31ac506e7ab2fa7b8e7f75"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/80f48523a0fe42db2e7375dff4e38a25c117090a"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/b453e00da1211e997b82743d28af7714c59c05c8"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/bd0e9289e2642f6a5c54faad304ce0f41e926d22"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/dfea32dd76f390e3155177b0038cc47b01386198"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
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|---|
Nomenclature
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