CVE catalog

CVE-2020-11958

re2c affected and fixed versions

[CVE catalog]

re2c 1.3 has a heap-based buffer overflow in Scanner::fill in parse/scanner.cc via a long lexeme.

Severity: Low · CVSS 2.8CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:L
Published: Apr 17, 2020, 12:00:00 AM UTC
Source: [NVD] · [CVE record]
EPSS: 1.70% · Oct 27, 2026

Projects and upstream resources

[re2c][Source-reported homepage]

Reported versions and fixes

Each observation applies to its named package, distribution, and release. Distribution backports can fix a vulnerability while retaining an older upstream version number.

Distribution / release	Package	Version	Status	Source
Debiantrixie	re2c	`1.3-2`	FixedDistribution-reported fixed boundary	[CVE-2020-11958]
Debiantrixie	re2c	`4.1-1`	Fixed	[CVE-2020-11958]
Debiansid	re2c	`1.3-2`	FixedDistribution-reported fixed boundary	[CVE-2020-11958]
Debiansid	re2c	`4.6-1`	Fixed	[CVE-2020-11958]
Debianforky	re2c	`1.3-2`	FixedDistribution-reported fixed boundary	[CVE-2020-11958]
Debianforky	re2c	`4.6-1`	Fixed	[CVE-2020-11958]
Debianbookworm	re2c	`1.3-2`	FixedDistribution-reported fixed boundary	[CVE-2020-11958]
Debianbookworm	re2c	`3.0-2`	Fixed	[CVE-2020-11958]

Showing 8 fix observations. All 26 observations, including unknown and conflicting reports, are available below.

Provider details and historical evidence

Distribution / release	Package	Version	Status	Source
Alpine3.11	re2c	`1.3-r1`	UnknownSource applicability is not established	[ALPINE-CVE-2020-11958]Oct 26, 2026, 11:17:55 AM UTC
Alpine3.12	re2c	`1.3-r1`	UnknownSource applicability is not established	[ALPINE-CVE-2020-11958]Oct 26, 2026, 11:17:55 AM UTC
Alpine3.13	re2c	`1.3-r1`	UnknownSource applicability is not established	[ALPINE-CVE-2020-11958]Oct 26, 2026, 11:17:55 AM UTC
Alpine3.14	re2c	`1.3-r1`	UnknownSource applicability is not established	[ALPINE-CVE-2020-11958]Oct 26, 2026, 11:17:55 AM UTC
Alpine3.15	re2c	`1.3-r1`	UnknownSource applicability is not established	[ALPINE-CVE-2020-11958]Oct 26, 2026, 11:17:55 AM UTC
Alpine3.16	re2c	`1.3-r1`	UnknownSource applicability is not established	[ALPINE-CVE-2020-11958]Oct 26, 2026, 11:17:55 AM UTC
Alpine3.17	re2c	`1.3-r1`	UnknownSource applicability is not established	[ALPINE-CVE-2020-11958]Oct 26, 2026, 11:17:55 AM UTC
Alpine3.18	re2c	`1.3-r1`	UnknownSource applicability is not established	[ALPINE-CVE-2020-11958]Oct 26, 2026, 11:17:55 AM UTC
Alpine3.19	re2c	`1.3-r1`	UnknownSource applicability is not established	[ALPINE-CVE-2020-11958]Oct 26, 2026, 11:17:55 AM UTC
Alpine3.20	re2c	`1.3-r1`	UnknownSource applicability is not established	[ALPINE-CVE-2020-11958]Oct 26, 2026, 11:17:55 AM UTC
Alpine3.21	re2c	`1.3-r1`	UnknownSource applicability is not established	[ALPINE-CVE-2020-11958]Oct 26, 2026, 11:17:55 AM UTC
Alpine3.22	re2c	`1.3-r1`	UnknownSource applicability is not established	[ALPINE-CVE-2020-11958]Oct 26, 2026, 11:17:55 AM UTC
Alpine3.23	re2c	`1.3-r1`	UnknownSource applicability is not established	[ALPINE-CVE-2020-11958]Oct 26, 2026, 11:17:55 AM UTC
Alpine3.24	re2c	`1.3-r1`	UnknownSource applicability is not established	[ALPINE-CVE-2020-11958]Oct 26, 2026, 11:17:55 AM UTC
Debianbookworm	re2c	`1.3-2`	FixedDistribution-reported fixed boundary	[CVE-2020-11958]
Debianbookworm	re2c	`3.0-2`	Fixed	[CVE-2020-11958]
Debianforky	re2c	`1.3-2`	FixedDistribution-reported fixed boundary	[CVE-2020-11958]
Debianforky	re2c	`4.6-1`	Fixed	[CVE-2020-11958]
Debiansid	re2c	`1.3-2`	FixedDistribution-reported fixed boundary	[CVE-2020-11958]
Debiansid	re2c	`4.6-1`	Fixed	[CVE-2020-11958]
Debiantrixie	re2c	`1.3-2`	FixedDistribution-reported fixed boundary	[CVE-2020-11958]
Debiantrixie	re2c	`4.1-1`	Fixed	[CVE-2020-11958]
Ubuntu20.04	re2c	`1.2.1-1`	UnknownSource applicability is not established	[USN-4338-2]Feb 10, 2026, 4:41:48 AM UTC[UBUNTU-CVE-2020-11958]Feb 4, 2026, 3:48:54 AM UTC
Ubuntu20.04	re2c	`1.3-1`	UnknownSource applicability is not established	[USN-4338-2]Feb 10, 2026, 4:41:48 AM UTC[UBUNTU-CVE-2020-11958]Feb 4, 2026, 3:48:54 AM UTC
Ubuntu20.04	re2c	`1.3-1build1`	UnknownSource applicability is not established	[USN-4338-2]Feb 10, 2026, 4:41:48 AM UTC[UBUNTU-CVE-2020-11958]Feb 4, 2026, 3:48:54 AM UTC
Ubuntu20.04	re2c	`1.3-1ubuntu0.1`	UnknownSource applicability is not established	[USN-4338-2]Feb 10, 2026, 4:41:48 AM UTC[UBUNTU-CVE-2020-11958]Feb 4, 2026, 3:48:54 AM UTC

Original provider fields

{
  "package_releases": [
    {
      "name": "re2c",
      "status": "fixed",
      "release": "sid",
      "version": "4.6-1"
    },
    {
      "name": "re2c",
      "status": "fixed",
      "release": "forky",
      "version": "4.6-1"
    },
    {
      "name": "re2c",
      "status": "fixed",
      "release": "trixie",
      "version": "4.1-1"
    },
    {
      "name": "re2c",
      "status": "fixed",
      "release": "bookworm",
      "version": "3.0-2"
    }
  ],
  "fixed_versions": [
    {
      "bug": 963158,
      "name": "re2c",
      "type": "source",
      "origin": null,
      "release": "sid",
      "urgency": "not yet assigned",
      "fixed_version": "1.3-2"
    },
    {
      "bug": 963158,
      "name": "re2c",
      "type": "source",
      "origin": null,
      "release": "forky",
      "urgency": "not yet assigned",
      "fixed_version": "1.3-2"
    },
    {
      "bug": 963158,
      "name": "re2c",
      "type": "source",
      "origin": null,
      "release": "trixie",
      "urgency": "not yet assigned",
      "fixed_version": "1.3-2"
    },
    {
      "bug": 963158,
      "name": "re2c",
      "type": "source",
      "origin": null,
      "release": "bookworm",
      "urgency": "not yet assigned",
      "fixed_version": "1.3-2"
    }
  ],
  "distribution_packages": [
    {
      "name": "re2c",
      "distro": "alpine",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.3-r1"
            }
          ]
        }
      ],
      "release": "3.11",
      "versions": [],
      "ecosystem": "apk",
      "provider_url": "https://osv.dev/vulnerability/ALPINE-CVE-2020-11958",
      "fixed_version": "1.3-r1",
      "provider_source": "pypi",
      "provider_record_id": "ALPINE-CVE-2020-11958",
      "provider_updated_at": "2026-10-26T11:17:55.101906510Z",
      "applicability_unknown": true
    },
    {
      "name": "re2c",
      "distro": "alpine",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.3-r1"
            }
          ]
        }
      ],
      "release": "3.12",
      "versions": [],
      "ecosystem": "apk",
      "provider_url": "https://osv.dev/vulnerability/ALPINE-CVE-2020-11958",
      "fixed_version": "1.3-r1",
      "provider_source": "pypi",
      "provider_record_id": "ALPINE-CVE-2020-11958",
      "provider_updated_at": "2026-10-26T11:17:55.101906510Z",
      "applicability_unknown": true
    },
    {
      "name": "re2c",
      "distro": "alpine",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.3-r1"
            }
          ]
        }
      ],
      "release": "3.13",
      "versions": [],
      "ecosystem": "apk",
      "provider_url": "https://osv.dev/vulnerability/ALPINE-CVE-2020-11958",
      "fixed_version": "1.3-r1",
      "provider_source": "pypi",
      "provider_record_id": "ALPINE-CVE-2020-11958",
      "provider_updated_at": "2026-10-26T11:17:55.101906510Z",
      "applicability_unknown": true
    },
    {
      "name": "re2c",
      "distro": "alpine",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.3-r1"
            }
          ]
        }
      ],
      "release": "3.14",
      "versions": [],
      "ecosystem": "apk",
      "provider_url": "https://osv.dev/vulnerability/ALPINE-CVE-2020-11958",
      "fixed_version": "1.3-r1",
      "provider_source": "pypi",
      "provider_record_id": "ALPINE-CVE-2020-11958",
      "provider_updated_at": "2026-10-26T11:17:55.101906510Z",
      "applicability_unknown": true
    },
    {
      "name": "re2c",
      "distro": "alpine",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.3-r1"
            }
          ]
        }
      ],
      "release": "3.15",
      "versions": [],
      "ecosystem": "apk",
      "provider_url": "https://osv.dev/vulnerability/ALPINE-CVE-2020-11958",
      "fixed_version": "1.3-r1",
      "provider_source": "pypi",
      "provider_record_id": "ALPINE-CVE-2020-11958",
      "provider_updated_at": "2026-10-26T11:17:55.101906510Z",
      "applicability_unknown": true
    },
    {
      "name": "re2c",
      "distro": "alpine",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.3-r1"
            }
          ]
        }
      ],
      "release": "3.16",
      "versions": [],
      "ecosystem": "apk",
      "provider_url": "https://osv.dev/vulnerability/ALPINE-CVE-2020-11958",
      "fixed_version": "1.3-r1",
      "provider_source": "pypi",
      "provider_record_id": "ALPINE-CVE-2020-11958",
      "provider_updated_at": "2026-10-26T11:17:55.101906510Z",
      "applicability_unknown": true
    },
    {
      "name": "re2c",
      "distro": "alpine",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.3-r1"
            }
          ]
        }
      ],
      "release": "3.17",
      "versions": [],
      "ecosystem": "apk",
      "provider_url": "https://osv.dev/vulnerability/ALPINE-CVE-2020-11958",
      "fixed_version": "1.3-r1",
      "provider_source": "pypi",
      "provider_record_id": "ALPINE-CVE-2020-11958",
      "provider_updated_at": "2026-10-26T11:17:55.101906510Z",
      "applicability_unknown": true
    },
    {
      "name": "re2c",
      "distro": "alpine",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.3-r1"
            }
          ]
        }
      ],
      "release": "3.18",
      "versions": [],
      "ecosystem": "apk",
      "provider_url": "https://osv.dev/vulnerability/ALPINE-CVE-2020-11958",
      "fixed_version": "1.3-r1",
      "provider_source": "pypi",
      "provider_record_id": "ALPINE-CVE-2020-11958",
      "provider_updated_at": "2026-10-26T11:17:55.101906510Z",
      "applicability_unknown": true
    },
    {
      "name": "re2c",
      "distro": "alpine",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.3-r1"
            }
          ]
        }
      ],
      "release": "3.19",
      "versions": [],
      "ecosystem": "apk",
      "provider_url": "https://osv.dev/vulnerability/ALPINE-CVE-2020-11958",
      "fixed_version": "1.3-r1",
      "provider_source": "pypi",
      "provider_record_id": "ALPINE-CVE-2020-11958",
      "provider_updated_at": "2026-10-26T11:17:55.101906510Z",
      "applicability_unknown": true
    },
    {
      "name": "re2c",
      "distro": "alpine",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.3-r1"
            }
          ]
        }
      ],
      "release": "3.20",
      "versions": [],
      "ecosystem": "apk",
      "provider_url": "https://osv.dev/vulnerability/ALPINE-CVE-2020-11958",
      "fixed_version": "1.3-r1",
      "provider_source": "pypi",
      "provider_record_id": "ALPINE-CVE-2020-11958",
      "provider_updated_at": "2026-10-26T11:17:55.101906510Z",
      "applicability_unknown": true
    },
    {
      "name": "re2c",
      "distro": "alpine",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.3-r1"
            }
          ]
        }
      ],
      "release": "3.21",
      "versions": [],
      "ecosystem": "apk",
      "provider_url": "https://osv.dev/vulnerability/ALPINE-CVE-2020-11958",
      "fixed_version": "1.3-r1",
      "provider_source": "pypi",
      "provider_record_id": "ALPINE-CVE-2020-11958",
      "provider_updated_at": "2026-10-26T11:17:55.101906510Z",
      "applicability_unknown": true
    },
    {
      "name": "re2c",
      "distro": "alpine",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.3-r1"
            }
          ]
        }
      ],
      "release": "3.22",
      "versions": [],
      "ecosystem": "apk",
      "provider_url": "https://osv.dev/vulnerability/ALPINE-CVE-2020-11958",
      "fixed_version": "1.3-r1",
      "provider_source": "pypi",
      "provider_record_id": "ALPINE-CVE-2020-11958",
      "provider_updated_at": "2026-10-26T11:17:55.101906510Z",
      "applicability_unknown": true
    },
    {
      "name": "re2c",
      "distro": "alpine",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.3-r1"
            }
          ]
        }
      ],
      "release": "3.23",
      "versions": [],
      "ecosystem": "apk",
      "provider_url": "https://osv.dev/vulnerability/ALPINE-CVE-2020-11958",
      "fixed_version": "1.3-r1",
      "provider_source": "pypi",
      "provider_record_id": "ALPINE-CVE-2020-11958",
      "provider_updated_at": "2026-10-26T11:17:55.101906510Z",
      "applicability_unknown": true
    },
    {
      "name": "re2c",
      "distro": "alpine",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.3-r1"
            }
          ]
        }
      ],
      "release": "3.24",
      "versions": [],
      "ecosystem": "apk",
      "provider_url": "https://osv.dev/vulnerability/ALPINE-CVE-2020-11958",
      "fixed_version": "1.3-r1",
      "provider_source": "pypi",
      "provider_record_id": "ALPINE-CVE-2020-11958",
      "provider_updated_at": "2026-10-26T11:17:55.101906510Z",
      "applicability_unknown": true
    },
    {
      "name": "re2c",
      "distro": "ubuntu",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.3-1ubuntu0.1"
            }
          ]
        }
      ],
      "release": "20.04",
      "versions": [
        "1.2.1-1",
        "1.3-1",
        "1.3-1build1"
      ],
      "ecosystem": "deb",
      "provider_url": "https://osv.dev/vulnerability/USN-4338-2",
      "fixed_version": "1.3-1ubuntu0.1",
      "provider_source": "pypi",
      "provider_record_id": "USN-4338-2",
      "provider_updated_at": "2026-02-10T04:41:48Z",
      "applicability_unknown": true
    },
    {
      "name": "re2c",
      "distro": "ubuntu",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.3-1ubuntu0.1"
            }
          ]
        }
      ],
      "release": "20.04",
      "versions": [
        "1.2.1-1",
        "1.3-1",
        "1.3-1build1"
      ],
      "ecosystem": "deb",
      "provider_url": "https://osv.dev/vulnerability/UBUNTU-CVE-2020-11958",
      "fixed_version": "1.3-1ubuntu0.1",
      "provider_source": "pypi",
      "provider_record_id": "UBUNTU-CVE-2020-11958",
      "provider_updated_at": "2026-02-04T03:48:54.505114Z",
      "applicability_unknown": true
    }
  ]
}

[Debian bug #963158]

OpenFactory catalog packages

Matching against OpenFactory catalog package versions is in progress.

[Debian 12 (Bookworm)]

[re2c]Unknown
Details (2)
- 3.0-2 · amd64 · bookworm
  Fixed · Fixed: 1.3-2
  dsa · re2c · debian · bookworm; dsa · re2c · debian · 12
- 3.0-2 · arm64 · bookworm
  Fixed · Fixed: 1.3-2
  dsa · re2c · debian · bookworm; dsa · re2c · debian · 12

[Debian 13 (Trixie)]

[re2c]Unknown
Details (2)
- 4.1-1 · amd64 · trixie
  Fixed · Fixed: 1.3-2
  dsa · re2c · debian · 13
- 4.1-1 · arm64 · trixie
  Fixed · Fixed: 1.3-2
  dsa · re2c · debian · 13

Observed: Oct 23, 2026, 5:47:01 PM UTC

References

[Debian Security Tracker] · [FIRST EPSS] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX]