CVE-2026-90159 (GCVE-0-2026-90159)
Vulnerability from cvelistv5
Published
2026-09-17 16:06
Modified
2026-10-19 08:58
Severity ?
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.
References
Impacted products
Vendor Product Version
Linux Linux Version: 859051dd165ec6cc915f0f2114699021144fd249
Version: 859051dd165ec6cc915f0f2114699021144fd249
Version: 859051dd165ec6cc915f0f2114699021144fd249
Version: 859051dd165ec6cc915f0f2114699021144fd249
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/core/filter.c"
          ],
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          "versions": [
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          "versions": [
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              "version": "0",
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              "version": "6.18.52",
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      "cpeApplicability": [
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                  "versionStartIncluding": "6.7",
                  "vulnerable": true
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              ],
              "negate": false,
              "operator": "OR"
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          ]
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      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Disallow bpf_{g,s}etsockopt() in cgroup UNIX getname hooks\n\n_bpf_setsockopt() and _bpf_getsockopt() call sock_owned_by_me() for\nfull sockets, so these helpers expect the socket lock to be held.\n\nBPF_CGROUP_UNIX_GETPEERNAME and BPF_CGROUP_UNIX_GETSOCKNAME run BPF\nprograms without acquiring the socket lock. A program attached to\neither hook can therefore trigger the sock_owned_by_me() warning by\ncalling bpf_setsockopt() or bpf_getsockopt().\n\nDisallow bpf_setsockopt() and bpf_getsockopt() for CGROUP_UNIX_GETPEERNAME\nand CGROUP_UNIX_GETSOCKNAME."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-19T08:58:57.864Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
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          "url": "https://git.kernel.org/stable/c/61769b9c882a964af3a6ebd9a8e43615f8713234"
        },
        {
          "url": "https://git.kernel.org/stable/c/fe91c3f64a738dd97e8542ad5bdfbe5ac430edf6"
        },
        {
          "url": "https://git.kernel.org/stable/c/daeb74f5f398e847d1d42906aec6610406a34fdc"
        },
        {
          "url": "https://git.kernel.org/stable/c/84473a7e1813a2da7b759ab1d098a84998c8d3f5"
        }
      ],
      "title": "bpf: Disallow bpf_{g,s}etsockopt() in cgroup UNIX getname hooks",
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  },
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-90159",
    "datePublished": "2026-09-17T16:06:51.151Z",
    "dateReserved": "2026-09-11T19:38:34.790Z",
    "dateUpdated": "2026-10-19T08:58:57.864Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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