{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "08f61a34913558e06576e7b6318bf583f273c1be"
            },
            {
              "fixed": "5b09d984b38b018b123c3a9e02a96bbc6468dbe5"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        },
        {
          "events": [
            {
              "introduced": "9cacf81f8161111db25f98e78a7a0e32ae142b3f"
            },
            {
              "fixed": "554ba7195c4108726450e24480c8449990c2268c"
            },
            {
              "fixed": "d02a12b4085ffe41ea750b1007f7a9c7aee2875a"
            },
            {
              "fixed": "e6fbf0eba87f50084d67508898f6ad6fc7ff1ba2"
            },
            {
              "fixed": "f68671b1a98d426c57864bd457c125fee14ac1a5"
            },
            {
              "fixed": "2bdbe00454200fcb0110f31eeca8d906a3515e74"
            },
            {
              "fixed": "31a89af4f513d750fec196e2bb6195a7d4473e9f"
            },
            {
              "fixed": "1b5aacd5b2419b0790e955e466d389a61c79b4b1"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        },
        {
          "events": [
            {
              "introduced": "5.10.188"
            },
            {
              "fixed": "5.10.270"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "5.10.270"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.11.0"
            },
            {
              "fixed": "5.15.221"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.12.0"
            },
            {
              "fixed": "6.1.188"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.16.0"
            },
            {
              "fixed": "6.6.157"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.2.0"
            },
            {
              "fixed": "6.12.110"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.18.52"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "7.2.6"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/90xxx/CVE-2026-90157.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Reject negative optlen in cgroup getsockopt hook\n\nA cgroup getsockopt BPF program can shrink ctx-\u003eoptlen after the\nkernel getsockopt handler has run. The kernel-buffer variant, used by\nTCP_ZEROCOPY_RECEIVE, only rejects values larger than the original\nlength.\n\nIf BPF writes a negative optlen, that value is accepted and propagated\nback to the TCP getsockopt code. It can then be passed to\ncopy_to_sockptr() as a size_t and trigger the hardened usercopy\nbytes \u003e INT_MAX warning.\n\nReject negative ctx.optlen in __cgroup_bpf_run_filter_getsockopt_kern(),\nmatching the lower-bound validation already present in the sockptr-based\ngetsockopt hook.",
  "id": "CVE-2026-90157",
  "modified": "2026-09-19T03:31:01.266702526Z",
  "published": "2026-09-17T16:06:49.081Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1b5aacd5b2419b0790e955e466d389a61c79b4b1"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2bdbe00454200fcb0110f31eeca8d906a3515e74"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/31a89af4f513d750fec196e2bb6195a7d4473e9f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/554ba7195c4108726450e24480c8449990c2268c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5b09d984b38b018b123c3a9e02a96bbc6468dbe5"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d02a12b4085ffe41ea750b1007f7a9c7aee2875a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e6fbf0eba87f50084d67508898f6ad6fc7ff1ba2"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f68671b1a98d426c57864bd457c125fee14ac1a5"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/90xxx/CVE-2026-90157.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-90157"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "summary": "bpf: Reject negative optlen in cgroup getsockopt hook"
}