bpf: Disallow bpf_{g,s}etsockopt() in cgroup UNIX getname hooks

{
  "id": "91db7edc2e1d9d14f6aa0b834a326f0f97d66cac3ac044376c32061f874c61e6",
  "url": "https://osv.dev/vulnerability/CVE-2026-90159",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "bpf: Disallow bpf_{g,s}etsockopt() in cgroup UNIX getname hooks",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: bpf: Disallow bpf_{g,s}etsockopt() in cgroup UNIX getname hooks _bpf_setsockopt() and _bpf_getsockopt() call sock_owned_by_me() for full sockets, so these helpers expect the socket lock to be held. BPF_CGROUP_UNIX_GETPEERNAME and BPF_CGROUP_UNIX_GETSOCKNAME run BPF programs without acquiring the socket lock. A program attached to either hook can therefore trigger the sock_owned_by_me() warning by calling bpf_setsockopt() or bpf_getsockopt(). Disallow bpf_setsockopt() and bpf_getsockopt() for CGROUP_UNIX_GETPEERNAME and CGROUP_UNIX_GETSOCKNAME.",
    "evidence": "osv:CVE-2026-90159",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "6.12.110",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.18.52",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "7.2.6",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2026-90159",
      "aliases": [
        "CVE-2026-90159"
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "859051dd165ec6cc915f0f2114699021144fd249"
                },
                {
                  "fixed": "61769b9c882a964af3a6ebd9a8e43615f8713234"
                },
                {
                  "fixed": "fe91c3f64a738dd97e8542ad5bdfbe5ac430edf6"
                },
                {
                  "fixed": "daeb74f5f398e847d1d42906aec6610406a34fdc"
                },
                {
                  "fixed": "84473a7e1813a2da7b759ab1d098a84998c8d3f5"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-90159.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.7.0"
                },
                {
                  "fixed": "6.12.110"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.13.0"
                },
                {
                  "fixed": "6.18.52"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.19.0"
                },
                {
                  "fixed": "7.2.6"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-90159.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:23.714129100Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/61769b9c882a964af3a6ebd9a8e43615f8713234",
        "https://git.kernel.org/stable/c/84473a7e1813a2da7b759ab1d098a84998c8d3f5",
        "https://git.kernel.org/stable/c/daeb74f5f398e847d1d42906aec6610406a34fdc",
        "https://git.kernel.org/stable/c/fe91c3f64a738dd97e8542ad5bdfbe5ac430edf6",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/90xxx/CVE-2026-90159.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-90159",
        "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
      ],
      "provider_metadata": {
        "cna_assigner": "Linux",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/90xxx/CVE-2026-90159.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-90159",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 490237,
  "published_at": "2026-09-17T16:06:51.151+00:00"
}