bpf: Fix issue in verifying allow_ptr_leaks

{
  "id": "dd6f43840b4a02b9198d7fab329c124d6cc18762a9e4360b28d9f804375c31b5",
  "url": "https://osv.dev/vulnerability/CVE-2023-54181",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "bpf: Fix issue in verifying allow_ptr_leaks",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: bpf: Fix issue in verifying allow_ptr_leaks After we converted the capabilities of our networking-bpf program from cap_sys_admin to cap_net_admin+cap_bpf, our networking-bpf program failed to start. Because it failed the bpf verifier, and the error log is \"R3 pointer comparison prohibited\". A simple reproducer as follows, SEC(\"cls-ingress\") int ingress(struct __sk_buff *skb) { struct iphdr *iph = (void *)(long)skb->data + sizeof(struct ethhdr); if ((long)(iph + 1) > (long)skb->data_end) return TC_ACT_STOLEN; return TC_ACT_OK; } Per discussion with Yonghong and Alexei [1], comparison of two packet pointers is not a pointer leak. This patch fixes it. Our local kernel is 6.1.y and we expect this fix to be backported to 6.1.y, so stable is CCed. [1]. https://lore.kernel.org/bpf/CAADnVQ+Nmspr7Si+pxWn8zkE7hX-7s93ugwC+94aXSy4uQ9vBg@mail.gmail.com/",
    "evidence": "osv:CVE-2023-54181",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "6.1.53",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.4.16",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.5.3",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2023-54181",
      "aliases": [
        "CVE-2023-54181"
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "2c78ee898d8f10ae6fb2fa23a3fbaec96b1b7366"
                },
                {
                  "fixed": "c96c67991aac6401b4c6996093bccb704bb2ea4b"
                },
                {
                  "fixed": "5927f0172d2809d8fc09c1ba667280b0387e9f73"
                },
                {
                  "fixed": "acfdc8b77016c8e648aadc283177546c88083dd3"
                },
                {
                  "fixed": "d75e30dddf73449bc2d10bb8e2f1a2c446bc67a2"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-54181.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "5.8.0"
                },
                {
                  "fixed": "6.1.53"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.2.0"
                },
                {
                  "fixed": "6.4.16"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.5.0"
                },
                {
                  "fixed": "6.5.3"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-54181.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:30.801795837Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/5927f0172d2809d8fc09c1ba667280b0387e9f73",
        "https://git.kernel.org/stable/c/acfdc8b77016c8e648aadc283177546c88083dd3",
        "https://git.kernel.org/stable/c/c96c67991aac6401b4c6996093bccb704bb2ea4b",
        "https://git.kernel.org/stable/c/d75e30dddf73449bc2d10bb8e2f1a2c446bc67a2",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/54xxx/CVE-2023-54181.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2023-54181",
        "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/2023/54xxx/CVE-2023-54181.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2023-54181",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 497820,
  "published_at": "2025-12-30T12:08:52.376+00:00"
}