net/hsr: fix NULL pointer dereference in prp_get_untagged_frame()

{
  "id": "690d3712529ccc1e933ef95d492200b527b5a8850bfed1a599a1388c092aa979",
  "url": "https://osv.dev/vulnerability/CVE-2025-68776",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "net/hsr: fix NULL pointer dereference in prp_get_untagged_frame()",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: net/hsr: fix NULL pointer dereference in prp_get_untagged_frame() prp_get_untagged_frame() calls __pskb_copy() to create frame->skb_std but doesn't check if the allocation failed. If __pskb_copy() returns NULL, skb_clone() is called with a NULL pointer, causing a crash: Oops: general protection fault, probably for non-canonical address 0xdffffc000000000f: 0000 [#1] SMP KASAN NOPTI KASAN: null-ptr-deref in range [0x0000000000000078-0x000000000000007f] CPU: 0 UID: 0 PID: 5625 Comm: syz.1.18 Not tainted syzkaller #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 RIP: 0010:skb_clone+0xd7/0x3a0 net/core/skbuff.c:2041 Code: 03 42 80 3c 20 00 74 08 4c 89 f7 e8 23 29 05 f9 49 83 3e 00 0f 85 a0 01 00 00 e8 94 dd 9d f8 48 8d 6b 7e 49 89 ee 49 c1 ee 03 <43> 0f b6 04 26 84 c0 0f 85 d1 01 00 00 44 0f b6 7d 00 41 83 e7 0c RSP: 0018:ffffc9000d00f200 EFLAGS: 00010207 RAX: ffffffff892235a1 RBX: 0000000000000000 RCX: ffff88803372a480 RDX: 0000000000000000 RSI: 0000000000000820 RDI: 0000000000000000 RBP: 000000000000007e R08: ffffffff8f7d0f77 R09: 1ffffffff1efa1ee R10: dffffc0000000000 R11: fffffbfff1efa1ef R12: dffffc0000000000 R13: 0000000000000820 R14: 000000000000000f R15: ffff88805144cc00 FS: 0000555557f6d500(0000) GS:ffff88808d72f000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000555581d35808 CR3: 000000005040e000 CR4",
    "evidence": "osv:CVE-2025-68776",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "5.10.248",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "5.15.198",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.1.160",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.6.120",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.12.64",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.18.3",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2025-68776",
      "aliases": [
        "CVE-2025-68776"
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "f266a683a4804dc499efc6c2206ef68efed029d0"
                },
                {
                  "fixed": "3ce95a57d8a1f0e20b637cdeddaaed81831ca819"
                },
                {
                  "fixed": "c851e43b88b40bb7c20176c51cbf4f8c8d960dd9"
                },
                {
                  "fixed": "7be6d25f4d974e44918ba3a5d58ebb9d36879087"
                },
                {
                  "fixed": "8f289fa12926aae44347ca7d490e216555d8f255"
                },
                {
                  "fixed": "1742974c24a9c1f1fd2e5edca0cbaccb720b397a"
                },
                {
                  "fixed": "6220d38a08f8837575cd8f830928b49a3a5a5095"
                },
                {
                  "fixed": "188e0fa5a679570ea35474575e724d8211423d17"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-68776.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "3.17.0"
                },
                {
                  "fixed": "5.10.248"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "5.11.0"
                },
                {
                  "fixed": "5.15.198"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "5.16.0"
                },
                {
                  "fixed": "6.1.160"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.2.0"
                },
                {
                  "fixed": "6.6.120"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.7.0"
                },
                {
                  "fixed": "6.12.64"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.13.0"
                },
                {
                  "fixed": "6.18.3"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-68776.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:28.005088851Z",
      "provider": "osv",
      "references": [
        "https://cert-portal.siemens.com/productcert/html/ssa-019113.html",
        "https://cert-portal.siemens.com/productcert/html/ssa-457936.html",
        "https://git.kernel.org/stable/c/1742974c24a9c1f1fd2e5edca0cbaccb720b397a",
        "https://git.kernel.org/stable/c/188e0fa5a679570ea35474575e724d8211423d17",
        "https://git.kernel.org/stable/c/3ce95a57d8a1f0e20b637cdeddaaed81831ca819",
        "https://git.kernel.org/stable/c/6220d38a08f8837575cd8f830928b49a3a5a5095",
        "https://git.kernel.org/stable/c/7be6d25f4d974e44918ba3a5d58ebb9d36879087",
        "https://git.kernel.org/stable/c/8f289fa12926aae44347ca7d490e216555d8f255",
        "https://git.kernel.org/stable/c/c851e43b88b40bb7c20176c51cbf4f8c8d960dd9",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/68xxx/CVE-2025-68776.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2025-68776",
        "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/2025/68xxx/CVE-2025-68776.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2025-68776",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 494547,
  "published_at": "2026-01-13T15:28:52.766+00:00"
}