gtp: fix use-after-free and null-ptr-deref in gtp_newlink()

{
  "id": "f73188ddd7081414976d31c161d86a1a210e962c35dc552939ac655f2bf53b83",
  "url": "https://osv.dev/vulnerability/CVE-2024-26793",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "gtp: fix use-after-free and null-ptr-deref in gtp_newlink()",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: gtp: fix use-after-free and null-ptr-deref in gtp_newlink() The gtp_link_ops operations structure for the subsystem must be registered after registering the gtp_net_ops pernet operations structure. Syzkaller hit 'general protection fault in gtp_genl_dump_pdp' bug: [ 1010.702740] gtp: GTP module unloaded [ 1010.715877] general protection fault, probably for non-canonical address 0xdffffc0000000001: 0000 [#1] SMP KASAN NOPTI [ 1010.715888] KASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f] [ 1010.715895] CPU: 1 PID: 128616 Comm: a.out Not tainted 6.8.0-rc6-std-def-alt1 #1 [ 1010.715899] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.0-alt1 04/01/2014 [ 1010.715908] RIP: 0010:gtp_newlink+0x4d7/0x9c0 [gtp] [ 1010.715915] Code: 80 3c 02 00 0f 85 41 04 00 00 48 8b bb d8 05 00 00 e8 ed f6 ff ff 48 89 c2 48 89 c5 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <80> 3c 02 00 0f 85 4f 04 00 00 4c 89 e2 4c 8b 6d 00 48 b8 00 00 00 [ 1010.715920] RSP: 0018:ffff888020fbf180 EFLAGS: 00010203 [ 1010.715929] RAX: dffffc0000000000 RBX: ffff88800399c000 RCX: 0000000000000000 [ 1010.715933] RDX: 0000000000000001 RSI: ffffffff84805280 RDI: 0000000000000282 [ 1010.715938] RBP: 000000000000000d R08: 0000000000000001 R09: 0000000000000000 [ 1010.715942] R10: 0000000000000001 R11: 0000000000000001 R12: ffff88800399cc80 [ 1010.715947] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000400 [ 1010",
    "evidence": "osv:CVE-2024-26793",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "4.19.309",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "5.4.271",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "5.10.212",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "5.15.151",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.1.81",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.6.21",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.7.9",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "high",
    "structured": {
      "id": "CVE-2024-26793",
      "aliases": [
        "CVE-2024-26793"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
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                  "introduced": "459aa660eb1d8ce67080da1983bb81d716aa5a69"
                },
                {
                  "fixed": "01129059d5141d62fae692f7a336ae3bc712d3eb"
                },
                {
                  "fixed": "ec92aa2cab6f0048f10d6aa4f025c5885cb1a1b6"
                },
                {
                  "fixed": "e668b92a3a01429923fd5ca13e99642aab47de69"
                },
                {
                  "fixed": "9376d059a705c5dfaac566c2d09891242013ae16"
                },
                {
                  "fixed": "abd32d7f5c0294c1b2454c5a3b13b18446bac627"
                },
                {
                  "fixed": "93dd420bc41531c9a31498b9538ca83ba6ec191e"
                },
                {
                  "fixed": "5366969a19a8a0d2ffb3d27ef6e8905e5e4216f8"
                },
                {
                  "fixed": "616d82c3cfa2a2146dd7e3ae47bda7e877ee549e"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-26793.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "4.7.0"
                },
                {
                  "fixed": "4.19.309"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "4.20.0"
                },
                {
                  "fixed": "5.4.271"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "5.5.0"
                },
                {
                  "fixed": "5.10.212"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "5.11.0"
                },
                {
                  "fixed": "5.15.151"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
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                  "introduced": "5.16.0"
                },
                {
                  "fixed": "6.1.81"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.2.0"
                },
                {
                  "fixed": "6.6.21"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.7.0"
                },
                {
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              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-26793.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:46.093373701Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/01129059d5141d62fae692f7a336ae3bc712d3eb",
        "https://git.kernel.org/stable/c/5366969a19a8a0d2ffb3d27ef6e8905e5e4216f8",
        "https://git.kernel.org/stable/c/616d82c3cfa2a2146dd7e3ae47bda7e877ee549e",
        "https://git.kernel.org/stable/c/9376d059a705c5dfaac566c2d09891242013ae16",
        "https://git.kernel.org/stable/c/93dd420bc41531c9a31498b9538ca83ba6ec191e",
        "https://git.kernel.org/stable/c/abd32d7f5c0294c1b2454c5a3b13b18446bac627",
        "https://git.kernel.org/stable/c/e668b92a3a01429923fd5ca13e99642aab47de69",
        "https://git.kernel.org/stable/c/ec92aa2cab6f0048f10d6aa4f025c5885cb1a1b6",
        "https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html",
        "https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/26xxx/CVE-2024-26793.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2024-26793",
        "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/2024/26xxx/CVE-2024-26793.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2024-26793",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 513976,
  "published_at": "2024-04-04T08:20:23.771+00:00"
}