CVE catalog

CVE-2021-31315

rlottie affected and fixed versions

Telegram Android <7.1.0 (2090), Telegram iOS <7.1, and Telegram macOS <7.1 are affected by a Stack Based Overflow in the blit function of their custom fork of the rlottie library. A remote attacker might be able to access Telegram's stack memory out-of-bounds on a victim device via a malicious animated sticker.

Severity: Low
Published: May 18, 2021, 8:15:00 PM UTC
Source: [NVD] · [CVE record]
EPSS: 1.29% · Oct 27, 2026

Projects and upstream resources

[rlottie][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	rlottie	Not reported	Not affectedDistribution reports not affected	[CVE-2021-31315]
Debiantrixie	rlottie	`0.1+dfsg-4.2+deb13u2`	Not affected	[CVE-2021-31315]
Debiansid	rlottie	Not reported	Not affectedDistribution reports not affected	[CVE-2021-31315]
Debiansid	rlottie	`0.1+dfsg-5`	Not affected	[CVE-2021-31315]
Ubuntupro	rlottie	`0~git20190721.24346d0+dfsg-2`	UnknownSource applicability is not established	[UBUNTU-CVE-2021-31315]Apr 22, 2026, 12:52:43 PM UTC[USN-7198-1]Apr 22, 2026, 10:48:27 AM UTC
Ubuntupro	rlottie	`0~git20190721.24346d0+dfsg-2build1`	UnknownSource applicability is not established	[UBUNTU-CVE-2021-31315]Apr 22, 2026, 12:52:43 PM UTC[USN-7198-1]Apr 22, 2026, 10:48:27 AM UTC
Ubuntupro	rlottie	`0~git20200305.a717479+dfsg-1`	UnknownSource applicability is not established	[UBUNTU-CVE-2021-31315]Apr 22, 2026, 12:52:43 PM UTC[USN-7198-1]Apr 22, 2026, 10:48:27 AM UTC
Ubuntupro	rlottie	`0~git20200305.a717479+dfsg-1ubuntu0.1~esm1`	UnknownSource applicability is not established	[UBUNTU-CVE-2021-31315]Apr 22, 2026, 12:52:43 PM UTC[USN-7198-1]Apr 22, 2026, 10:48:27 AM UTC
Debianforky	rlottie	Not reported	Not affectedDistribution reports not affected	[CVE-2021-31315]
Debianforky	rlottie	`0.1+dfsg-5`	Not affected	[CVE-2021-31315]
Debianbookworm	rlottie	Not reported	Not affectedDistribution reports not affected	[CVE-2021-31315]
Debianbookworm	rlottie	`0.1+dfsg-4+deb12u2`	Not affected	[CVE-2021-31315]

Showing 12 observations. All 14 observations, including unknown and conflicting reports, are available below.

Provider details and historical evidence

Distribution / release	Package	Version	Status	Source
Debianbookworm	rlottie	Not reported	Not affectedDistribution reports not affected	[CVE-2021-31315]
Debianbookworm	rlottie	`0.1+dfsg-4+deb12u2`	Not affected	[CVE-2021-31315]
Debianforky	rlottie	Not reported	Not affectedDistribution reports not affected	[CVE-2021-31315]
Debianforky	rlottie	`0.1+dfsg-5`	Not affected	[CVE-2021-31315]
Debiansid	rlottie	Not reported	Not affectedDistribution reports not affected	[CVE-2021-31315]
Debiansid	rlottie	`0.1+dfsg-5`	Not affected	[CVE-2021-31315]
Debiantrixie	rlottie	Not reported	Not affectedDistribution reports not affected	[CVE-2021-31315]
Debiantrixie	rlottie	`0.1+dfsg-4.2+deb13u2`	Not affected	[CVE-2021-31315]
Ubuntu22.04	rlottie	`0.1+dfsg-2`	UnknownSource applicability is not established	[UBUNTU-CVE-2021-31315]Apr 22, 2026, 12:52:43 PM UTC[USN-7198-1]Apr 22, 2026, 10:48:27 AM UTC
Ubuntu22.04	rlottie	`0.1+dfsg-2ubuntu0.1`	UnknownSource applicability is not established	[UBUNTU-CVE-2021-31315]Apr 22, 2026, 12:52:43 PM UTC[USN-7198-1]Apr 22, 2026, 10:48:27 AM UTC
Ubuntupro	rlottie	`0~git20190721.24346d0+dfsg-2`	UnknownSource applicability is not established	[UBUNTU-CVE-2021-31315]Apr 22, 2026, 12:52:43 PM UTC[USN-7198-1]Apr 22, 2026, 10:48:27 AM UTC
Ubuntupro	rlottie	`0~git20190721.24346d0+dfsg-2build1`	UnknownSource applicability is not established	[UBUNTU-CVE-2021-31315]Apr 22, 2026, 12:52:43 PM UTC[USN-7198-1]Apr 22, 2026, 10:48:27 AM UTC
Ubuntupro	rlottie	`0~git20200305.a717479+dfsg-1`	UnknownSource applicability is not established	[UBUNTU-CVE-2021-31315]Apr 22, 2026, 12:52:43 PM UTC[USN-7198-1]Apr 22, 2026, 10:48:27 AM UTC
Ubuntupro	rlottie	`0~git20200305.a717479+dfsg-1ubuntu0.1~esm1`	UnknownSource applicability is not established	[UBUNTU-CVE-2021-31315]Apr 22, 2026, 12:52:43 PM UTC[USN-7198-1]Apr 22, 2026, 10:48:27 AM UTC

Original provider fields

{
  "package_releases": [
    {
      "name": "rlottie",
      "status": "not affected",
      "release": "sid",
      "version": "0.1+dfsg-5"
    },
    {
      "name": "rlottie",
      "status": "not affected",
      "release": "forky",
      "version": "0.1+dfsg-5"
    },
    {
      "name": "rlottie",
      "status": "not affected",
      "release": "trixie",
      "version": "0.1+dfsg-4.2+deb13u2"
    },
    {
      "name": "rlottie",
      "status": "not affected",
      "release": "bookworm",
      "version": "0.1+dfsg-4+deb12u2"
    }
  ],
  "fixed_versions": [
    {
      "bug": null,
      "name": "rlottie",
      "type": "source",
      "origin": null,
      "release": "sid",
      "urgency": "unimportant",
      "fixed_version": "0"
    },
    {
      "bug": null,
      "name": "rlottie",
      "type": "source",
      "origin": null,
      "release": "forky",
      "urgency": "unimportant",
      "fixed_version": "0"
    },
    {
      "bug": null,
      "name": "rlottie",
      "type": "source",
      "origin": null,
      "release": "trixie",
      "urgency": "unimportant",
      "fixed_version": "0"
    },
    {
      "bug": null,
      "name": "rlottie",
      "type": "source",
      "origin": null,
      "release": "bookworm",
      "urgency": "unimportant",
      "fixed_version": "0"
    }
  ],
  "distribution_packages": [
    {
      "name": "rlottie",
      "distro": "ubuntu",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0~git20200305.a717479+dfsg-1ubuntu0.1~esm1"
            }
          ]
        }
      ],
      "release": "pro",
      "versions": [
        "0~git20190721.24346d0+dfsg-2",
        "0~git20190721.24346d0+dfsg-2build1",
        "0~git20200305.a717479+dfsg-1"
      ],
      "ecosystem": "deb",
      "provider_url": "https://osv.dev/vulnerability/UBUNTU-CVE-2021-31315",
      "fixed_version": "0~git20200305.a717479+dfsg-1ubuntu0.1~esm1",
      "provider_source": "pypi",
      "provider_record_id": "UBUNTU-CVE-2021-31315",
      "provider_updated_at": "2026-04-22T12:52:43.382919Z",
      "applicability_unknown": true
    },
    {
      "name": "rlottie",
      "distro": "ubuntu",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.1+dfsg-2ubuntu0.1"
            }
          ]
        }
      ],
      "release": "22.04",
      "versions": [
        "0.1+dfsg-2"
      ],
      "ecosystem": "deb",
      "provider_url": "https://osv.dev/vulnerability/UBUNTU-CVE-2021-31315",
      "fixed_version": "0.1+dfsg-2ubuntu0.1",
      "provider_source": "pypi",
      "provider_record_id": "UBUNTU-CVE-2021-31315",
      "provider_updated_at": "2026-04-22T12:52:43.382919Z",
      "applicability_unknown": true
    },
    {
      "name": "rlottie",
      "distro": "ubuntu",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0~git20200305.a717479+dfsg-1ubuntu0.1~esm1"
            }
          ]
        }
      ],
      "release": "pro",
      "versions": [
        "0~git20190721.24346d0+dfsg-2",
        "0~git20190721.24346d0+dfsg-2build1",
        "0~git20200305.a717479+dfsg-1"
      ],
      "ecosystem": "deb",
      "provider_url": "https://osv.dev/vulnerability/USN-7198-1",
      "fixed_version": "0~git20200305.a717479+dfsg-1ubuntu0.1~esm1",
      "provider_source": "pypi",
      "provider_record_id": "USN-7198-1",
      "provider_updated_at": "2026-04-22T10:48:27.496604Z",
      "applicability_unknown": true
    },
    {
      "name": "rlottie",
      "distro": "ubuntu",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.1+dfsg-2ubuntu0.1"
            }
          ]
        }
      ],
      "release": "22.04",
      "versions": [
        "0.1+dfsg-2"
      ],
      "ecosystem": "deb",
      "provider_url": "https://osv.dev/vulnerability/USN-7198-1",
      "fixed_version": "0.1+dfsg-2ubuntu0.1",
      "provider_source": "pypi",
      "provider_record_id": "USN-7198-1",
      "provider_updated_at": "2026-04-22T10:48:27.496604Z",
      "applicability_unknown": true
    }
  ]
}

OpenFactory catalog packages

Matching against OpenFactory catalog package versions is in progress.

[Debian 12 (Bookworm)]

[librlottie0-1]Unknown
Source package: [rlottie]
Details (2)
- 0.1+dfsg-4+deb12u2 · amd64 · bookworm
  Not affected
  dsa · rlottie · debian · bookworm
- 0.1+dfsg-4+deb12u2 · arm64 · bookworm
  Not affected
  dsa · rlottie · debian · bookworm
[librlottie-dev]Unknown
Source package: [rlottie]
Details (2)
- 0.1+dfsg-4+deb12u2 · amd64 · bookworm
  Not affected
  dsa · rlottie · debian · bookworm
- 0.1+dfsg-4+deb12u2 · arm64 · bookworm
  Not affected
  dsa · rlottie · debian · bookworm

Observed: Oct 23, 2026, 5:56:52 PM UTC

References

[Debian Security Tracker] · [FIRST EPSS] · [OSV Package Vulnerability Database]