Medium
Security advisory
In Libsixel prior to and including v1.10.3, a NULL pointer dereference in the stb_image.h component of libsixel allows attackers to cause a denial of service (DOS) via a crafted PICT file.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2021-45340
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 11:23 UTC · Revision 1
Source evidence
In Libsixel prior to and including v1.10.3, a NULL pointer dereference in the stb_image.h component of libsixel allows attackers to cause a denial of service (DOS) via a crafted PICT file.
osv:CVE-2021-45340
Complete source record
{
"id": "ee45d234d445ccd62e99dd6d2ee37f82cff1dfa59c9005259c69e2b0e0d1f288",
"url": "https://osv.dev/vulnerability/CVE-2021-45340",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "CVE-2021-45340",
"summary": "In Libsixel prior to and including v1.10.3, a NULL pointer dereference in the stb_image.h component of libsixel allows attackers to cause a denial of service (DOS) via a crafted PICT file.",
"evidence": "osv:CVE-2021-45340",
"products": [],
"severity": "medium",
"structured": {
"id": "CVE-2021-45340",
"aliases": [
"CVE-2021-45340"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/libsixel/libsixel",
"type": "GIT",
"events": [
{
"introduced": "0"
},
{
"last_affected": "8051f79190186884fba16a3cc87692ea069a02b9"
}
],
"database_specific": {
"extracted_events": [
{
"cpe": "cpe:2.3:a:libsixel:libsixel:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "0"
},
{
"last_affected": "1.10.3"
}
],
"source": "CPE_RANGE"
}
]
}
}
],
"versions": [
"v1.10.3",
"v1.10.2",
"v1.10.1",
"v1.10.0",
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"v1.8.0",
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"v1.7.2",
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"v1.6.1",
"v1.5.2",
"v1.5.1",
"v1.5.0",
"v1.4.13",
"v1.4.12",
"v1.4.11",
"v1.4.10",
"v1.4.9",
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"v1.4.7",
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"v1.4.5",
"v1.4.4",
"v1.4.3",
"v1.4.2",
"v1.4.1",
"v1.4.0",
"v1.3.6",
"v1.3.5",
"v1.3.4",
"v1.3.3",
"v1.3.2",
"v1.3.1",
"v1.1.2",
"v1.1.1",
"v1.1.0",
"v1.0.2",
"v1.0.1",
"v1.0.0",
"v0.28.0",
"v0.27.1",
"v0.27.0",
"v0.26.0",
"v0.25.5",
"v0.25.4",
"v0.25.3",
"v0.25.2",
"v0.25.1",
"v0.25.0",
"v0.24.2",
"v0.24.0",
"v0.23.2",
"v0.23.1",
"v0.23.0",
"v0.22.3",
"v0.22.2",
"v0.22.1",
"v0.22.0",
"v0.21.1",
"v0.21.0",
"v0.20.0",
"v0.19.6",
"v0.19.5",
"v0.19.4",
"v0.19.3",
"v0.19.2",
"v0.18.0",
"v0.17.2",
"v0.17.1",
"v0.17.0",
"v0.16.1",
"v0.16.0",
"v0.15.0",
"v0.14.0"
],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-45340.json"
}
}
],
"modified": "2026-10-20T10:54:12.080221633Z",
"provider": "osv",
"references": [
"https://github.com/libsixel/libsixel/issues/51"
],
"provider_metadata": {}
},
"related_cves": [
{
"value": "CVE-2021-45340",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 384940,
"published_at": "2022-01-25T12:15:07.643+00:00"
}