FKIE_CVE-2023-54181

Vulnerability from fkie_nvd - Published: 2025-12-30 13:16 - Updated: 2026-06-17 06:46
Severity
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/
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/5927f0172d2809d8fc09c1ba667280b0387e9f73
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/acfdc8b77016c8e648aadc283177546c88083dd3
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c96c67991aac6401b4c6996093bccb704bb2ea4b
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d75e30dddf73449bc2d10bb8e2f1a2c446bc67a2
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "kernel/bpf/verifier.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "c96c67991aac6401b4c6996093bccb704bb2ea4b",
              "status": "affected",
              "version": "2c78ee898d8f10ae6fb2fa23a3fbaec96b1b7366",
              "versionType": "git"
            },
            {
              "lessThan": "5927f0172d2809d8fc09c1ba667280b0387e9f73",
              "status": "affected",
              "version": "2c78ee898d8f10ae6fb2fa23a3fbaec96b1b7366",
              "versionType": "git"
            },
            {
              "lessThan": "acfdc8b77016c8e648aadc283177546c88083dd3",
              "status": "affected",
              "version": "2c78ee898d8f10ae6fb2fa23a3fbaec96b1b7366",
              "versionType": "git"
            },
            {
              "lessThan": "d75e30dddf73449bc2d10bb8e2f1a2c446bc67a2",
              "status": "affected",
              "version": "2c78ee898d8f10ae6fb2fa23a3fbaec96b1b7366",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "kernel/bpf/verifier.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.8"
            },
            {
              "lessThan": "5.8",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.53",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.4.*",
              "status": "unaffected",
              "version": "6.4.16",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.5.*",
              "status": "unaffected",
              "version": "6.5.3",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.6",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Fix issue in verifying allow_ptr_leaks\n\nAfter we converted the capabilities of our networking-bpf program from\ncap_sys_admin to cap_net_admin+cap_bpf, our networking-bpf program\nfailed to start. Because it failed the bpf verifier, and the error log\nis \"R3 pointer comparison prohibited\".\n\nA simple reproducer as follows,\n\nSEC(\"cls-ingress\")\nint ingress(struct __sk_buff *skb)\n{\n\tstruct iphdr *iph = (void *)(long)skb-\u003edata + sizeof(struct ethhdr);\n\n\tif ((long)(iph + 1) \u003e (long)skb-\u003edata_end)\n\t\treturn TC_ACT_STOLEN;\n\treturn TC_ACT_OK;\n}\n\nPer discussion with Yonghong and Alexei [1], comparison of two packet\npointers is not a pointer leak. This patch fixes it.\n\nOur local kernel is 6.1.y and we expect this fix to be backported to\n6.1.y, so stable is CCed.\n\n[1]. https://lore.kernel.org/bpf/CAADnVQ+Nmspr7Si+pxWn8zkE7hX-7s93ugwC+94aXSy4uQ9vBg@mail.gmail.com/"
    }
  ],
  "id": "CVE-2023-54181",
  "lastModified": "2026-06-17T06:46:57.203",
  "metrics": {},
  "published": "2025-12-30T13:16:06.037",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/5927f0172d2809d8fc09c1ba667280b0387e9f73"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/acfdc8b77016c8e648aadc283177546c88083dd3"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/c96c67991aac6401b4c6996093bccb704bb2ea4b"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/d75e30dddf73449bc2d10bb8e2f1a2c446bc67a2"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Deferred"
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.