UBUNTU-CVE-2026-93018 (CVE-2026-93018)
Vulnerability from osv_ubuntu – Published: 2026-09-18 14:19 – Updated: 2026-09-23 23:39 – Source website
VLAI
Details
Imager versions before 1.036 for Perl disclose uninitialised heap memory reading a paletted image with pixel indexes past its colour map in i_gpix_p and i_glin_p. The palette is allocated uninitialised, and only the entries a reader adds count as populated. The TGA reader stores pixel indexes without checking them against the colour map. i_gpix_p() rejects only an index greater than the count, so an index equal to it reads the first unpopulated entry, and getpixel() returns it. i_glin_p() skips any index at or beyond the count without writing that pixel to the caller's buffer. The palette-to-RGB conversion reads each row through an uninitialised buffer, so those pixels of the converted image hold prior heap contents. Reading an attacker-supplied image through Imager->read() and then fetching its pixels or converting it to RGB discloses process heap memory.
Severity
5.5 (Medium)
N/A (UNKNOWN)
References
{
"affected": [
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libimager-perl",
"binary_version": "1.004+dfsg-1build1"
}
]
},
"package": {
"ecosystem": "Ubuntu:16.04:LTS",
"name": "libimager-perl",
"purl": "pkg:deb/ubuntu/libimager-perl@1.004+dfsg-1build1?arch=source\u0026distro=xenial"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"1.003+dfsg-1",
"1.004+dfsg-1",
"1.004+dfsg-1build1"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libimager-perl",
"binary_version": "1.006+dfsg-1"
}
]
},
"package": {
"ecosystem": "Ubuntu:18.04:LTS",
"name": "libimager-perl",
"purl": "pkg:deb/ubuntu/libimager-perl@1.006+dfsg-1?arch=source\u0026distro=bionic"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"1.005+dfsg-2build1",
"1.006+dfsg-1"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libimager-perl",
"binary_version": "1.011+dfsg-1build1"
}
]
},
"package": {
"ecosystem": "Ubuntu:20.04:LTS",
"name": "libimager-perl",
"purl": "pkg:deb/ubuntu/libimager-perl@1.011+dfsg-1build1?arch=source\u0026distro=focal"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"1.011+dfsg-1",
"1.011+dfsg-1build1"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libimager-perl",
"binary_version": "1.012+dfsg-2build1"
}
]
},
"package": {
"ecosystem": "Ubuntu:22.04:LTS",
"name": "libimager-perl",
"purl": "pkg:deb/ubuntu/libimager-perl@1.012+dfsg-2build1?arch=source\u0026distro=jammy"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"1.012+dfsg-1build1",
"1.012+dfsg-2",
"1.012+dfsg-2build1"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libimager-perl",
"binary_version": "1.023+dfsg-1build2"
}
]
},
"package": {
"ecosystem": "Ubuntu:24.04:LTS",
"name": "libimager-perl",
"purl": "pkg:deb/ubuntu/libimager-perl@1.023+dfsg-1build2?arch=source\u0026distro=noble"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"1.019+dfsg-2",
"1.020+dfsg-1",
"1.022+dfsg-1",
"1.023+dfsg-1",
"1.023+dfsg-1build1",
"1.023+dfsg-1build2"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libimager-perl",
"binary_version": "1.029+dfsg-1"
}
]
},
"package": {
"ecosystem": "Ubuntu:26.04:LTS",
"name": "libimager-perl",
"purl": "pkg:deb/ubuntu/libimager-perl@1.029+dfsg-1?arch=source\u0026distro=resolute"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"1.027+dfsg-1",
"1.029+dfsg-1"
]
}
],
"aliases": [],
"details": "Imager versions before 1.036 for Perl disclose uninitialised heap memory reading a paletted image with pixel indexes past its colour map in i_gpix_p and i_glin_p. The palette is allocated uninitialised, and only the entries a reader adds count as populated. The TGA reader stores pixel indexes without checking them against the colour map. i_gpix_p() rejects only an index greater than the count, so an index equal to it reads the first unpopulated entry, and getpixel() returns it. i_glin_p() skips any index at or beyond the count without writing that pixel to the caller\u0027s buffer. The palette-to-RGB conversion reads each row through an uninitialised buffer, so those pixels of the converted image hold prior heap contents. Reading an attacker-supplied image through Imager-\u003eread() and then fetching its pixels or converting it to RGB discloses process heap memory.",
"id": "UBUNTU-CVE-2026-93018",
"modified": "2026-09-23T23:39:38Z",
"published": "2026-09-18T14:19:00Z",
"references": [
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2026-93018"
},
{
"type": "REPORT",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-93018"
},
{
"type": "REPORT",
"url": "https://lists.security.metacpan.org/cve-announce/msg/43654795/"
},
{
"type": "REPORT",
"url": "https://github.com/tonycoz/imager/security/advisories/GHSA-j7v7-cm4g-vrgf"
},
{
"type": "REPORT",
"url": "https://github.com/tonycoz/imager/commit/dcf0a52e2732399d42ab44d98af6934658d068ee.patch"
},
{
"type": "REPORT",
"url": "https://metacpan.org/release/TONYC/Imager-1.036/changes"
},
{
"type": "REPORT",
"url": "http://www.openwall.com/lists/oss-security/2026/09/18/8"
}
],
"related": [],
"schema_version": "1.7.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
],
"upstream": [
"CVE-2026-93018"
]
}
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Browse all ATT&CK techniques and the vulnerabilities related to each.
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