High
libsixel — security advisory
A vulnerability was found in saitoha libsixel up to 1.10.3. Affected by this issue is the function sixel_debug_print_palette of the file src/encoder.c of the component img2sixel. The manipulation results in stack-based buffer overflow. The attack must be initiated from a local position. The exploit has been made public and could be used. The patch is identified as 316c086e79d66b62c0c4bc66229ee894e4fdb7d1. Applying a patch is advised to resolve this issue.
- Products
- libsixel
- Affected versions
- 1.10.3-2, 1.10.3-3, 1.10.3-3build1, 1.10.5-1, 1.10.5-1build1, 1.4.2-1, 1.5.2-2, 1.7.3-1, 1.8.2-1, 1.8.2-2.1, 1.8.6-2, 1:1.8.7-r2-1
- Fixed versions
- Not specified
- CVEs
- CVE-2025-9300
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 02:52 UTC · Revision 1
Source evidence
A vulnerability was found in saitoha libsixel up to 1.10.3. Affected by this issue is the function sixel_debug_print_palette of the file src/encoder.c of the component img2sixel. The manipulation results in stack-based buffer overflow. The attack must be initiated from a local position. The exploit has been made public and could be used. The patch is identified as 316c086e79d66b62c0c4bc66229ee894e4fdb7d1. Applying a patch is advised to resolve this issue.
osv:UBUNTU-CVE-2025-9300
libsixel
Fixed versions: Not specified
libsixel
Fixed versions: Not specified
libsixel
Fixed versions: Not specified
libsixel
Fixed versions: Not specified
libsixel
Fixed versions: Not specified
libsixel
Fixed versions: Not specified
libsixel
Fixed versions: Not specified
libsixel
Fixed versions: Not specified
Complete source record
{
"id": "13c939b9ec3399036fa7d3e8a9e98016e1baaf5186947d129acd9088d0cce8d8",
"url": "https://osv.dev/vulnerability/UBUNTU-CVE-2025-9300",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "UBUNTU-CVE-2025-9300",
"summary": "A vulnerability was found in saitoha libsixel up to 1.10.3. Affected by this issue is the function sixel_debug_print_palette of the file src/encoder.c of the component img2sixel. The manipulation results in stack-based buffer overflow. The attack must be initiated from a local position. The exploit has been made public and could be used. The patch is identified as 316c086e79d66b62c0c4bc66229ee894e4fdb7d1. Applying a patch is advised to resolve this issue.",
"evidence": "osv:UBUNTU-CVE-2025-9300",
"products": [
{
"name": {
"value": "libsixel",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.4.2-1",
"evidence": "/affected/0/versions"
},
{
"value": "1.5.2-2",
"evidence": "/affected/0/versions"
}
]
},
{
"name": {
"value": "libsixel",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.5.2-2",
"evidence": "/affected/1/versions"
},
{
"value": "1.7.3-1",
"evidence": "/affected/1/versions"
}
]
},
{
"name": {
"value": "libsixel",
"evidence": "/affected/2/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.8.2-1",
"evidence": "/affected/2/versions"
},
{
"value": "1.8.2-2.1",
"evidence": "/affected/2/versions"
}
]
},
{
"name": {
"value": "libsixel",
"evidence": "/affected/3/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.8.6-2",
"evidence": "/affected/3/versions"
},
{
"value": "1.10.3-2",
"evidence": "/affected/3/versions"
},
{
"value": "1.10.3-3",
"evidence": "/affected/3/versions"
}
]
},
{
"name": {
"value": "libsixel",
"evidence": "/affected/4/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.10.3-3",
"evidence": "/affected/4/versions"
},
{
"value": "1.10.3-3build1",
"evidence": "/affected/4/versions"
}
]
},
{
"name": {
"value": "libsixel",
"evidence": "/affected/5/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.10.5-1",
"evidence": "/affected/5/versions"
}
]
},
{
"name": {
"value": "libsixel",
"evidence": "/affected/6/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.10.5-1build1",
"evidence": "/affected/6/versions"
},
{
"value": "1:1.8.7-r2-1",
"evidence": "/affected/6/versions"
}
]
},
{
"name": {
"value": "libsixel",
"evidence": "/affected/7/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.10.5-1",
"evidence": "/affected/7/versions"
},
{
"value": "1.10.5-1build1",
"evidence": "/affected/7/versions"
}
]
}
],
"severity": "high",
"structured": {
"id": "UBUNTU-CVE-2025-9300",
"aliases": [
"UBUNTU-CVE-2025-9300"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L"
},
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
},
{
"type": "CVSS_V4",
"score": "CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P"
},
{
"type": "Ubuntu",
"score": "medium"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "libsixel",
"purl": "pkg:deb/ubuntu/libsixel?arch=source&distro=xenial",
"ecosystem": "Ubuntu:16.04:LTS"
},
"versions": [
"1.4.2-1",
"1.5.2-2"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-9300.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libsixel-bin",
"binary_version": "1.5.2-2"
},
{
"binary_name": "libsixel1",
"binary_version": "1.5.2-2"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "libsixel",
"purl": "pkg:deb/ubuntu/libsixel?arch=source&distro=bionic",
"ecosystem": "Ubuntu:18.04:LTS"
},
"versions": [
"1.5.2-2",
"1.7.3-1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-9300.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libsixel-bin",
"binary_version": "1.7.3-1"
},
{
"binary_name": "libsixel-examples",
"binary_version": "1.7.3-1"
},
{
"binary_name": "libsixel1",
"binary_version": "1.7.3-1"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "libsixel",
"purl": "pkg:deb/ubuntu/libsixel?arch=source&distro=focal",
"ecosystem": "Ubuntu:20.04:LTS"
},
"versions": [
"1.8.2-1",
"1.8.2-2.1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-9300.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libsixel-bin",
"binary_version": "1.8.2-2.1"
},
{
"binary_name": "libsixel-examples",
"binary_version": "1.8.2-2.1"
},
{
"binary_name": "libsixel1",
"binary_version": "1.8.2-2.1"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "libsixel",
"purl": "pkg:deb/ubuntu/libsixel?arch=source&distro=jammy",
"ecosystem": "Ubuntu:22.04:LTS"
},
"versions": [
"1.8.6-2",
"1.10.3-2",
"1.10.3-3"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-9300.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libsixel-bin",
"binary_version": "1.10.3-3"
},
{
"binary_name": "libsixel-examples",
"binary_version": "1.10.3-3"
},
{
"binary_name": "libsixel1",
"binary_version": "1.10.3-3"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "libsixel",
"purl": "pkg:deb/ubuntu/libsixel?arch=source&distro=noble",
"ecosystem": "Ubuntu:24.04:LTS"
},
"versions": [
"1.10.3-3",
"1.10.3-3build1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-9300.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libsixel-bin",
"binary_version": "1.10.3-3build1"
},
{
"binary_name": "libsixel-examples",
"binary_version": "1.10.3-3build1"
},
{
"binary_name": "libsixel1",
"binary_version": "1.10.3-3build1"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "libsixel",
"purl": "pkg:deb/ubuntu/libsixel?arch=source&distro=questing",
"ecosystem": "Ubuntu:25.10"
},
"versions": [
"1.10.5-1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-9300.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libsixel-bin",
"binary_version": "1.10.5-1"
},
{
"binary_name": "libsixel-examples",
"binary_version": "1.10.5-1"
},
{
"binary_name": "libsixel1",
"binary_version": "1.10.5-1"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "libsixel",
"purl": "pkg:deb/ubuntu/libsixel?arch=source&distro=stonking",
"ecosystem": "Ubuntu:26.10"
},
"versions": [
"1.10.5-1build1",
"1:1.8.7-r2-1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-9300.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libsixel-bin",
"binary_version": "1:1.8.7-r2-1"
},
{
"binary_name": "libsixel1",
"binary_version": "1:1.8.7-r2-1"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "libsixel",
"purl": "pkg:deb/ubuntu/libsixel?arch=source&distro=resolute",
"ecosystem": "Ubuntu:26.04:LTS"
},
"versions": [
"1.10.5-1",
"1.10.5-1build1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-9300.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libsixel-bin",
"binary_version": "1.10.5-1build1"
},
{
"binary_name": "libsixel-examples",
"binary_version": "1.10.5-1build1"
},
{
"binary_name": "libsixel1",
"binary_version": "1.10.5-1build1"
}
]
}
}
],
"modified": "2026-10-17T12:59:40.754576871Z",
"provider": "osv",
"upstream": [
"CVE-2025-9300"
],
"references": [
"https://ubuntu.com/security/CVE-2025-9300",
"https://www.cve.org/CVERecord?id=CVE-2025-9300"
]
},
"related_cves": [
{
"value": "CVE-2025-9300",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/1/score"
},
"source_id": "core-osv",
"document_id": 359710,
"published_at": "2025-08-21T13:15:00+00:00"
}