CVE-2026-98077 (GCVE-0-2026-98077)
Vulnerability from cvelistv5
Published
2026-09-25 10:24
Modified
2026-10-19 09:13
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_conntrack_sip: fix OOB read in sip_skip_whitespace() sip_skip_whitespace() returns dptr unchanged when its own loop exhausts the buffer (dptr == limit), instead of NULL like its sibling sip_follow_continuation() returns on its own "no more data" path. ct_sip_get_header() only checks for NULL after calling it: dptr = sip_skip_whitespace(dptr, limit); if (dptr == NULL) break; if (*dptr != ':' || ++dptr >= limit) break; so a recognized header name followed only by spaces/tabs running to the exact end of the SIP payload, with no colon, makes the very next statement read one byte past the buffer. Make both "no more data" outcomes return NULL, matching the convention sip_follow_continuation() already uses and that both existing callers already check for.
References
Impacted products
Vendor Product Version
Linux Linux Version: ea45f12a2766dae54e5426a23e8f4bafdbe2782e
Version: ea45f12a2766dae54e5426a23e8f4bafdbe2782e
Version: ea45f12a2766dae54e5426a23e8f4bafdbe2782e
Version: ea45f12a2766dae54e5426a23e8f4bafdbe2782e
Version: ea45f12a2766dae54e5426a23e8f4bafdbe2782e
Version: ea45f12a2766dae54e5426a23e8f4bafdbe2782e
Version: ea45f12a2766dae54e5426a23e8f4bafdbe2782e
Version: ea45f12a2766dae54e5426a23e8f4bafdbe2782e
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{
  "containers": {
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        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/netfilter/nf_conntrack_sip.c"
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          "programFiles": [
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          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "status": "affected",
              "version": "2.6.26"
            },
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              "status": "unaffected",
              "version": "0",
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              "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"
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              "status": "unaffected",
              "version": "6.6.158",
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              "version": "7.2.7",
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              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
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                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: nf_conntrack_sip: fix OOB read in sip_skip_whitespace()\n\nsip_skip_whitespace() returns dptr unchanged when its own loop\nexhausts the buffer (dptr == limit), instead of NULL like its sibling\nsip_follow_continuation() returns on its own \"no more data\" path.\n\nct_sip_get_header() only checks for NULL after calling it:\n\n  dptr = sip_skip_whitespace(dptr, limit);\n  if (dptr == NULL)\n          break;\n  if (*dptr != \u0027:\u0027 || ++dptr \u003e= limit)\n          break;\n\nso a recognized header name followed only by spaces/tabs running to\nthe exact end of the SIP payload, with no colon, makes the very next\nstatement read one byte past the buffer.\n\nMake both \"no more data\" outcomes return NULL, matching the\nconvention sip_follow_continuation() already uses and that both\nexisting callers already check for."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-19T09:13:26.849Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/9ae0a87e6f513293677fe286729fbae34d592215"
        },
        {
          "url": "https://git.kernel.org/stable/c/b6277622b7323000895b674321c9a1f060553188"
        },
        {
          "url": "https://git.kernel.org/stable/c/0cfb96a118c5c6d46d7a1cfdfa18355ad734ca79"
        },
        {
          "url": "https://git.kernel.org/stable/c/c6beb08b1a9fdb96795816d8329ed75dd785d48e"
        },
        {
          "url": "https://git.kernel.org/stable/c/60c012b2d05e1558b0f30ea3f15a2c3ca2f24d94"
        },
        {
          "url": "https://git.kernel.org/stable/c/4be8380e3af008f418f97992c06f23be649a430d"
        },
        {
          "url": "https://git.kernel.org/stable/c/4a30aa2ba007db18210dd52219ecbd5528c03523"
        },
        {
          "url": "https://git.kernel.org/stable/c/e8f8231824b5815f57ce62cba116e511b10196de"
        }
      ],
      "title": "netfilter: nf_conntrack_sip: fix OOB read in sip_skip_whitespace()",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-98077",
    "datePublished": "2026-09-25T10:24:15.691Z",
    "dateReserved": "2026-09-25T10:19:56.074Z",
    "dateUpdated": "2026-10-19T09:13:26.849Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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