Vulnerability-Lookup

CVE-2026-98383 (GCVE-0-2026-98383)

Vulnerability from cvelistv5 – Published: 2026-10-09 07:34 – Updated: 2026-10-09 07:34

Title

bpf: Disallow bpf_skb_pull_data() for LWT_SEG6LOCAL

Summary

In the Linux kernel, the following vulnerability has been resolved: bpf: Disallow bpf_skb_pull_data() for LWT_SEG6LOCAL An LWT_SEG6LOCAL program can invalidate its cached SRH with bpf_lwt_seg6_adjust_srh() and then call bpf_skb_pull_data(). The latter may reallocate skb->head, leaving the per-CPU SRH pointer dangling. Post-program SRH validation then writes through that pointer. Disallow bpf_skb_pull_data() for LWT_SEG6LOCAL programs so the verifier rejects this unsafe helper combination. Other LWT program types continue to expose the helper through lwt_out_func_proto().

Severity

No CVSS data available.

Assigner

Linux CNA under the mitre root

CNA scorecard D 54/100 over 6633 records in the last 180 days details

References

8 references

URL	Tags
https://git.kernel.org/stable/c/0f38472a2aa8704a6…
https://git.kernel.org/stable/c/cae8674489f26edf7…
https://git.kernel.org/stable/c/9f9e57b5a3a033f95…
https://git.kernel.org/stable/c/df0072be6fc373cb2…
https://git.kernel.org/stable/c/b9bb0e735460751b6…
https://git.kernel.org/stable/c/37b18688cd18fd86d…
https://git.kernel.org/stable/c/fca71ead7a20290af…
https://git.kernel.org/stable/c/e4a62833adff6ef0f…

Impacted products

2 products

Vendor	Product	Version	CPE status
Linux	Linux	Affected: 004d4b274e2a1a895a0e5dc66158b90a7d463d44 , < 0f38472a2aa8704a6b514c0dfa9c32f3672b8f32 (git) Affected: 004d4b274e2a1a895a0e5dc66158b90a7d463d44 , < cae8674489f26edf7553fdd660599466cbb4c32f (git) Affected: 004d4b274e2a1a895a0e5dc66158b90a7d463d44 , < 9f9e57b5a3a033f95f49ef9d541340cdbcb80abb (git) Affected: 004d4b274e2a1a895a0e5dc66158b90a7d463d44 , < df0072be6fc373cb22f9ea854d458b04e32a03cf (git) Affected: 004d4b274e2a1a895a0e5dc66158b90a7d463d44 , < b9bb0e735460751b620156f800a4279a28573392 (git) Affected: 004d4b274e2a1a895a0e5dc66158b90a7d463d44 , < 37b18688cd18fd86d2f35c212df1611862a26cd5 (git) Affected: 004d4b274e2a1a895a0e5dc66158b90a7d463d44 , < fca71ead7a20290af1e2046983eeafae43d21af1 (git) Affected: 004d4b274e2a1a895a0e5dc66158b90a7d463d44 , < e4a62833adff6ef0fe7c0b90393204fe3c26b5c5 (git)	guessed
Linux	Linux	Affected: 4.18 Unaffected: 0 , < 4.18 (semver) Unaffected: 5.10.271 , ≤ 5.10.* (semver) Unaffected: 5.15.222 , ≤ 5.15.* (semver) Unaffected: 6.1.189 , ≤ 6.1.* (semver) Unaffected: 6.6.158 , ≤ 6.6.* (semver) Unaffected: 6.12.112 , ≤ 6.12.* (semver) Unaffected: 6.18.55 , ≤ 6.18.* (semver) Unaffected: 7.2.9 , ≤ 7.2.* (semver) Unaffected: 7.3-rc5 , ≤ * (original_commit_for_fix)	guessed

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/core/filter.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "lessThan": "0f38472a2aa8704a6b514c0dfa9c32f3672b8f32",
              "status": "affected",
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              "versionType": "git"
            },
            {
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              "versionType": "git"
            },
            {
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              "status": "affected",
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              "versionType": "git"
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              "versionType": "git"
            },
            {
              "lessThan": "b9bb0e735460751b620156f800a4279a28573392",
              "status": "affected",
              "version": "004d4b274e2a1a895a0e5dc66158b90a7d463d44",
              "versionType": "git"
            },
            {
              "lessThan": "37b18688cd18fd86d2f35c212df1611862a26cd5",
              "status": "affected",
              "version": "004d4b274e2a1a895a0e5dc66158b90a7d463d44",
              "versionType": "git"
            },
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              "status": "affected",
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              "versionType": "git"
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        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "net/core/filter.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.18"
            },
            {
              "lessThan": "4.18",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.271",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.222",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.189",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.158",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.112",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.55",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.9",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3-rc5",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.271",
                  "versionStartIncluding": "4.18",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.222",
                  "versionStartIncluding": "4.18",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.189",
                  "versionStartIncluding": "4.18",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.158",
                  "versionStartIncluding": "4.18",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.112",
                  "versionStartIncluding": "4.18",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.55",
                  "versionStartIncluding": "4.18",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2.9",
                  "versionStartIncluding": "4.18",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.3-rc5",
                  "versionStartIncluding": "4.18",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Disallow bpf_skb_pull_data() for LWT_SEG6LOCAL\n\nAn LWT_SEG6LOCAL program can invalidate its cached SRH with\nbpf_lwt_seg6_adjust_srh() and then call bpf_skb_pull_data(). The latter\nmay reallocate skb-\u003ehead, leaving the per-CPU SRH pointer dangling.\nPost-program SRH validation then writes through that pointer.\n\nDisallow bpf_skb_pull_data() for LWT_SEG6LOCAL programs so the verifier\nrejects this unsafe helper combination. Other LWT program types continue\nto expose the helper through lwt_out_func_proto()."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-09T07:34:22.408Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/0f38472a2aa8704a6b514c0dfa9c32f3672b8f32"
        },
        {
          "url": "https://git.kernel.org/stable/c/cae8674489f26edf7553fdd660599466cbb4c32f"
        },
        {
          "url": "https://git.kernel.org/stable/c/9f9e57b5a3a033f95f49ef9d541340cdbcb80abb"
        },
        {
          "url": "https://git.kernel.org/stable/c/df0072be6fc373cb22f9ea854d458b04e32a03cf"
        },
        {
          "url": "https://git.kernel.org/stable/c/b9bb0e735460751b620156f800a4279a28573392"
        },
        {
          "url": "https://git.kernel.org/stable/c/37b18688cd18fd86d2f35c212df1611862a26cd5"
        },
        {
          "url": "https://git.kernel.org/stable/c/fca71ead7a20290af1e2046983eeafae43d21af1"
        },
        {
          "url": "https://git.kernel.org/stable/c/e4a62833adff6ef0fe7c0b90393204fe3c26b5c5"
        }
      ],
      "title": "bpf: Disallow bpf_skb_pull_data() for LWT_SEG6LOCAL",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-98383",
    "datePublished": "2026-10-09T07:34:22.408Z",
    "dateReserved": "2026-09-25T10:25:14.345Z",
    "dateUpdated": "2026-10-09T07:34:22.408Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "nvd": {
      "cve": {
        "affected": [
          {
            "affectedData": [
              {
                "defaultStatus": "unaffected",
                "product": "Linux",
                "programFiles": [
                  "net/core/filter.c"
                ],
                "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                "vendor": "Linux",
                "versions": [
                  {
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                    "status": "affected",
                    "version": "004d4b274e2a1a895a0e5dc66158b90a7d463d44",
                    "versionType": "git"
                  },
                  {
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                    "status": "affected",
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                    "versionType": "git"
                  },
                  {
                    "lessThan": "9f9e57b5a3a033f95f49ef9d541340cdbcb80abb",
                    "status": "affected",
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                    "versionType": "git"
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                  {
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                    "status": "affected",
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                    "versionType": "git"
                  },
                  {
                    "lessThan": "b9bb0e735460751b620156f800a4279a28573392",
                    "status": "affected",
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                    "versionType": "git"
                  },
                  {
                    "lessThan": "37b18688cd18fd86d2f35c212df1611862a26cd5",
                    "status": "affected",
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                    "versionType": "git"
                  },
                  {
                    "lessThan": "fca71ead7a20290af1e2046983eeafae43d21af1",
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                    "versionType": "git"
                  },
                  {
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                    "status": "affected",
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                    "versionType": "git"
                  }
                ]
              },
              {
                "defaultStatus": "affected",
                "product": "Linux",
                "programFiles": [
                  "net/core/filter.c"
                ],
                "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                "vendor": "Linux",
                "versions": [
                  {
                    "status": "affected",
                    "version": "4.18"
                  },
                  {
                    "lessThan": "4.18",
                    "status": "unaffected",
                    "version": "0",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "5.10.*",
                    "status": "unaffected",
                    "version": "5.10.271",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "5.15.*",
                    "status": "unaffected",
                    "version": "5.15.222",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "6.1.*",
                    "status": "unaffected",
                    "version": "6.1.189",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "6.6.*",
                    "status": "unaffected",
                    "version": "6.6.158",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "6.12.*",
                    "status": "unaffected",
                    "version": "6.12.112",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "6.18.*",
                    "status": "unaffected",
                    "version": "6.18.55",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "7.2.*",
                    "status": "unaffected",
                    "version": "7.2.9",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "*",
                    "status": "unaffected",
                    "version": "7.3-rc5",
                    "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: Disallow bpf_skb_pull_data() for LWT_SEG6LOCAL\n\nAn LWT_SEG6LOCAL program can invalidate its cached SRH with\nbpf_lwt_seg6_adjust_srh() and then call bpf_skb_pull_data(). The latter\nmay reallocate skb-\u003ehead, leaving the per-CPU SRH pointer dangling.\nPost-program SRH validation then writes through that pointer.\n\nDisallow bpf_skb_pull_data() for LWT_SEG6LOCAL programs so the verifier\nrejects this unsafe helper combination. Other LWT program types continue\nto expose the helper through lwt_out_func_proto()."
          }
        ],
        "id": "CVE-2026-98383",
        "lastModified": "2026-10-09T08:16:56.800",
        "metrics": {},
        "published": "2026-10-09T08:16:56.800",
        "references": [
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/0f38472a2aa8704a6b514c0dfa9c32f3672b8f32"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/37b18688cd18fd86d2f35c212df1611862a26cd5"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/9f9e57b5a3a033f95f49ef9d541340cdbcb80abb"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/b9bb0e735460751b620156f800a4279a28573392"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/cae8674489f26edf7553fdd660599466cbb4c32f"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/df0072be6fc373cb22f9ea854d458b04e32a03cf"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/e4a62833adff6ef0fe7c0b90393204fe3c26b5c5"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/fca71ead7a20290af1e2046983eeafae43d21af1"
          }
        ],
        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Received"
      }
    }
  }
}

FKIE_CVE-2026-98383

Vulnerability from fkie_nvd - Published: 2026-10-09 08:16 - Updated: 2026-10-09 08:16

Severity

Summary

References

	URL	Tags
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/0f38472a2aa8704a6b514c0dfa9c32f3672b8f32
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/37b18688cd18fd86d2f35c212df1611862a26cd5
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/9f9e57b5a3a033f95f49ef9d541340cdbcb80abb
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/b9bb0e735460751b620156f800a4279a28573392
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/cae8674489f26edf7553fdd660599466cbb4c32f
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/df0072be6fc373cb22f9ea854d458b04e32a03cf
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/e4a62833adff6ef0fe7c0b90393204fe3c26b5c5
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/fca71ead7a20290af1e2046983eeafae43d21af1

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/core/filter.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "0f38472a2aa8704a6b514c0dfa9c32f3672b8f32",
              "status": "affected",
              "version": "004d4b274e2a1a895a0e5dc66158b90a7d463d44",
              "versionType": "git"
            },
            {
              "lessThan": "cae8674489f26edf7553fdd660599466cbb4c32f",
              "status": "affected",
              "version": "004d4b274e2a1a895a0e5dc66158b90a7d463d44",
              "versionType": "git"
            },
            {
              "lessThan": "9f9e57b5a3a033f95f49ef9d541340cdbcb80abb",
              "status": "affected",
              "version": "004d4b274e2a1a895a0e5dc66158b90a7d463d44",
              "versionType": "git"
            },
            {
              "lessThan": "df0072be6fc373cb22f9ea854d458b04e32a03cf",
              "status": "affected",
              "version": "004d4b274e2a1a895a0e5dc66158b90a7d463d44",
              "versionType": "git"
            },
            {
              "lessThan": "b9bb0e735460751b620156f800a4279a28573392",
              "status": "affected",
              "version": "004d4b274e2a1a895a0e5dc66158b90a7d463d44",
              "versionType": "git"
            },
            {
              "lessThan": "37b18688cd18fd86d2f35c212df1611862a26cd5",
              "status": "affected",
              "version": "004d4b274e2a1a895a0e5dc66158b90a7d463d44",
              "versionType": "git"
            },
            {
              "lessThan": "fca71ead7a20290af1e2046983eeafae43d21af1",
              "status": "affected",
              "version": "004d4b274e2a1a895a0e5dc66158b90a7d463d44",
              "versionType": "git"
            },
            {
              "lessThan": "e4a62833adff6ef0fe7c0b90393204fe3c26b5c5",
              "status": "affected",
              "version": "004d4b274e2a1a895a0e5dc66158b90a7d463d44",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "net/core/filter.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.18"
            },
            {
              "lessThan": "4.18",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.271",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.222",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.189",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.158",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.112",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.55",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.9",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3-rc5",
              "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: Disallow bpf_skb_pull_data() for LWT_SEG6LOCAL\n\nAn LWT_SEG6LOCAL program can invalidate its cached SRH with\nbpf_lwt_seg6_adjust_srh() and then call bpf_skb_pull_data(). The latter\nmay reallocate skb-\u003ehead, leaving the per-CPU SRH pointer dangling.\nPost-program SRH validation then writes through that pointer.\n\nDisallow bpf_skb_pull_data() for LWT_SEG6LOCAL programs so the verifier\nrejects this unsafe helper combination. Other LWT program types continue\nto expose the helper through lwt_out_func_proto()."
    }
  ],
  "id": "CVE-2026-98383",
  "lastModified": "2026-10-09T08:16:56.800",
  "metrics": {},
  "published": "2026-10-09T08:16:56.800",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/0f38472a2aa8704a6b514c0dfa9c32f3672b8f32"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/37b18688cd18fd86d2f35c212df1611862a26cd5"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/9f9e57b5a3a033f95f49ef9d541340cdbcb80abb"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/b9bb0e735460751b620156f800a4279a28573392"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/cae8674489f26edf7553fdd660599466cbb4c32f"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/df0072be6fc373cb22f9ea854d458b04e32a03cf"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/e4a62833adff6ef0fe7c0b90393204fe3c26b5c5"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/fca71ead7a20290af1e2046983eeafae43d21af1"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}

GHSA-PH4X-4WH2-2QRM

Vulnerability from github – Published: 2026-10-09 09:31 – Updated: 2026-10-09 09:31

Details

In the Linux kernel, the following vulnerability has been resolved:

bpf: Disallow bpf_skb_pull_data() for LWT_SEG6LOCAL

An LWT_SEG6LOCAL program can invalidate its cached SRH with bpf_lwt_seg6_adjust_srh() and then call bpf_skb_pull_data(). The latter may reallocate skb->head, leaving the per-CPU SRH pointer dangling. Post-program SRH validation then writes through that pointer.

Disallow bpf_skb_pull_data() for LWT_SEG6LOCAL programs so the verifier rejects this unsafe helper combination. Other LWT program types continue to expose the helper through lwt_out_func_proto().

Show details on source website

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To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-98383"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-10-09T08:16:56Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Disallow bpf_skb_pull_data() for LWT_SEG6LOCAL\n\nAn LWT_SEG6LOCAL program can invalidate its cached SRH with\nbpf_lwt_seg6_adjust_srh() and then call bpf_skb_pull_data(). The latter\nmay reallocate skb-\u003ehead, leaving the per-CPU SRH pointer dangling.\nPost-program SRH validation then writes through that pointer.\n\nDisallow bpf_skb_pull_data() for LWT_SEG6LOCAL programs so the verifier\nrejects this unsafe helper combination. Other LWT program types continue\nto expose the helper through lwt_out_func_proto().",
  "id": "GHSA-ph4x-4wh2-2qrm",
  "modified": "2026-10-09T09:31:05Z",
  "published": "2026-10-09T09:31:05Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-98383"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0f38472a2aa8704a6b514c0dfa9c32f3672b8f32"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/37b18688cd18fd86d2f35c212df1611862a26cd5"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9f9e57b5a3a033f95f49ef9d541340cdbcb80abb"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b9bb0e735460751b620156f800a4279a28573392"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/cae8674489f26edf7553fdd660599466cbb4c32f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/df0072be6fc373cb22f9ea854d458b04e32a03cf"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e4a62833adff6ef0fe7c0b90393204fe3c26b5c5"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/fca71ead7a20290af1e2046983eeafae43d21af1"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

Sightings

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Nomenclature

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Confirmed: The vulnerability has been validated from an analyst's perspective.
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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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

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Action not permitted

CVE-2026-98383 (GCVE-0-2026-98383)

FKIE_CVE-2026-98383

GHSA-PH4X-4WH2-2QRM

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