{
  "cveId": "CVE-2026-90065",
  "url": "https://patchblox.com/security/cve/CVE-2026-90065",
  "summary": "CVE-2026-90065 is fixed in 17 products on 1 platform, first by DEBIAN-CVE-2026-90065, released September 23, 2026. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "net/smc: release the internal TCP sock on IPPROTO_SMC socket creation failure",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  net/smc: release the internal TCP sock on IPPROTO_SMC socket creation failure  IPPROTO_SMC sockets create an internal TCP sock (\u0022clcsock\u0022) from the proto-\u003Einit hook. When socket creation fails after proto-\u003Einit has run - e.g. a cgroup BPF program attached to BPF_CGROUP_INET_SOCK_CREATE denies the socket - sk_common_release() only invokes sk_prot-\u003Edestroy if it is set, but neither smc_inet_prot nor smc_inet6_prot defines it, and smc_destruct() returns early unless sk_state is SMC_CLOSED. As a result, every failing socket(AF_INET, SOCK_STREAM, IPPROTO_SMC) call leaks one tcp_sock, so an unprivileged task able to attach a deny-all BPF_CGROUP_INET_SOCK_CREATE program to its own cgroup can grow kernel memory unboundedly.  Add a .destroy hook to both protos that releases the clcsock via smc_clcsock_release(). smc_sk_init() hashes the sock into the smc hashinfo before the clcsock is created, and smc_diag dumps walk that hash dereferencing smc-\u003Eclcsock without taking clcsock_release_lock, while sk_common_release() calls .destroy before .unhash. Unhash the sock before releasing the clcsock, as __smc_release() does, so a concurrent dump cannot observe the release; the second unhash in sk_common_release() is a no-op.",
  "published": "2026-09-17T17:16:55Z",
  "severity": "",
  "epss": 0.002,
  "epssPercentile": 0.09933,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-90065",
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  "dataAsOf": "2026-11-08T13:06:02Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
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    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
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}