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osv-2026-1235
Vulnerability from osv_ossfuzz
Published
2026-09-06 00:05
Modified
2026-09-06 00:05
Summary
UNKNOWN READ in renumber_by_map
Details

OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=557283672

Crash type: UNKNOWN READ
Crash state:
renumber_by_map
renumber_by_map
disable_noname_group_capture
References
To clipboard 

{
  "affected": [
    {
      "database_specific": {
        "fixed_range": "a31cf11a22434a819e4594c9443799b4340819b0:98f3bdeb9ad4af5bcb03a7ae1872e694b207f274",
        "introduced_range": "ae1445463ca03bac9b46147166c0ee00993363e8:10ebd3a354f2a052ac865960145fda844b3b120e"
      },
      "ecosystem_specific": {
        "severity": "MEDIUM"
      },
      "package": {
        "ecosystem": "OSS-Fuzz",
        "name": "fluent-bit",
        "purl": "pkg:generic/fluent-bit"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "ef3f0750c741ae4586a093adf747bb77c932bec7"
            },
            {
              "fixed": "98f3bdeb9ad4af5bcb03a7ae1872e694b207f274"
            }
          ],
          "repo": "https://github.com/fluent/fluent-bit/",
          "type": "GIT"
        }
      ],
      "versions": [
        "v4.2.1",
        "v4.2.2",
        "v5.0.0",
        "v5.0.0-dev-20260228",
        "v5.0.1",
        "v5.0.2",
        "v5.0.3",
        "v5.0.4",
        "v5.0.5",
        "v5.0.6",
        "v5.0.7",
        "v5.0.8",
        "v5.0.9",
        "v5.1.0",
        "v5.1.1"
      ]
    }
  ],
  "details": "OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=557283672\n\n```\nCrash type: UNKNOWN READ\nCrash state:\nrenumber_by_map\nrenumber_by_map\ndisable_noname_group_capture\n```\n",
  "id": "OSV-2026-1235",
  "modified": "2026-09-06T00:05:19.578548Z",
  "published": "2026-09-06T00:05:19.578124Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=557283672"
    }
  ],
  "schema_version": "1.9.0",
  "summary": "UNKNOWN READ in renumber_by_map"
}



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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

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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.
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  • 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.


Detection rules are retrieved from Rulezet.