UBUNTU-CVE-2026-111124 (CVE-2026-111124)
Vulnerability from osv_ubuntu – Published: 2026-10-16 00:00 – Updated: 2026-10-22 08:03 – Source website
VLAI
Details
CFITSIO through 4.7.0 contains a heap-based out-of-bounds read vulnerability in the imcompress.c unquantize helpers that allows attackers to read memory before the fits_rand_value table via a zero or negative ZDITHER0 seed. Attackers can supply a crafted FITS file with a SUBTRACTIVE_DITHER_1 compressed image, read through fits_open_file() and fits_read_pix(), to cause crashes or leak heap contents in decoded pixels.
Severity
6.1 (Medium)
7.1 (High)
N/A (UNKNOWN)
References
{
"affected": [
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libcfitsio-bin",
"binary_version": "3.370-5"
},
{
"binary_name": "libcfitsio2",
"binary_version": "3.370-5"
}
]
},
"package": {
"ecosystem": "Ubuntu:16.04:LTS",
"name": "cfitsio",
"purl": "pkg:deb/ubuntu/cfitsio@3.370-5?arch=source\u0026distro=xenial"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"3.370-5"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libcfitsio-bin",
"binary_version": "3.430-2"
},
{
"binary_name": "libcfitsio5",
"binary_version": "3.430-2"
}
]
},
"package": {
"ecosystem": "Ubuntu:18.04:LTS",
"name": "cfitsio",
"purl": "pkg:deb/ubuntu/cfitsio@3.430-2?arch=source\u0026distro=bionic"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"3.410-1",
"3.420-3",
"3.430-1",
"3.430-2"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libcfitsio-bin",
"binary_version": "3.470-3"
},
{
"binary_name": "libcfitsio8",
"binary_version": "3.470-3"
}
]
},
"package": {
"ecosystem": "Ubuntu:20.04:LTS",
"name": "cfitsio",
"purl": "pkg:deb/ubuntu/cfitsio@3.470-3?arch=source\u0026distro=focal"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"3.470-3"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libcfitsio-bin",
"binary_version": "4.0.0-1"
},
{
"binary_name": "libcfitsio9",
"binary_version": "4.0.0-1"
}
]
},
"package": {
"ecosystem": "Ubuntu:22.04:LTS",
"name": "cfitsio",
"purl": "pkg:deb/ubuntu/cfitsio@4.0.0-1?arch=source\u0026distro=jammy"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"3.490-3",
"4.0.0-1"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libcfitsio-bin",
"binary_version": "4.3.1-1.1build2"
},
{
"binary_name": "libcfitsio10t64",
"binary_version": "4.3.1-1.1build2"
}
]
},
"package": {
"ecosystem": "Ubuntu:24.04:LTS",
"name": "cfitsio",
"purl": "pkg:deb/ubuntu/cfitsio@4.3.1-1.1build2?arch=source\u0026distro=noble"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"4.2.0-3",
"4.3.0-2",
"4.3.1-1",
"4.3.1-1.1build1",
"4.3.1-1.1build2"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "fitsverify",
"binary_version": "4.22+cfitsio4.7.0-2"
},
{
"binary_name": "libcfitsio-bin",
"binary_version": "4.7.0-2"
},
{
"binary_name": "libcfitsio10t64",
"binary_version": "4.7.0-2"
}
]
},
"package": {
"ecosystem": "Ubuntu:26.10",
"name": "cfitsio",
"purl": "pkg:deb/ubuntu/cfitsio@4.7.0-2?arch=source\u0026distro=stonking"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"4.6.3-1",
"4.6.4-1",
"4.7.0-2"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "fitsverify",
"binary_version": "4.22+cfitsio4.6.3-1"
},
{
"binary_name": "libcfitsio-bin",
"binary_version": "4.6.3-1"
},
{
"binary_name": "libcfitsio10t64",
"binary_version": "4.6.3-1"
}
]
},
"package": {
"ecosystem": "Ubuntu:26.04:LTS",
"name": "cfitsio",
"purl": "pkg:deb/ubuntu/cfitsio@4.6.3-1?arch=source\u0026distro=resolute"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"4.6.2-2",
"4.6.3-1"
]
}
],
"aliases": [],
"details": "CFITSIO through 4.7.0 contains a heap-based out-of-bounds read vulnerability in the imcompress.c unquantize helpers that allows attackers to read memory before the fits_rand_value table via a zero or negative ZDITHER0 seed. Attackers can supply a crafted FITS file with a SUBTRACTIVE_DITHER_1 compressed image, read through fits_open_file() and fits_read_pix(), to cause crashes or leak heap contents in decoded pixels.",
"id": "UBUNTU-CVE-2026-111124",
"modified": "2026-10-22T08:03:39Z",
"published": "2026-10-16T00:00:00Z",
"references": [
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2026-111124"
},
{
"type": "REPORT",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-111124"
},
{
"type": "REPORT",
"url": "https://github.com/HEASARC/cfitsio"
},
{
"type": "REPORT",
"url": "https://github.com/HEASARC/cfitsio/blob/d6d27653740864a0483e74cff23c53e34e1dceee/imcompress.c#L5353-L5362"
},
{
"type": "REPORT",
"url": "https://github.com/HEASARC/cfitsio/blob/d6d27653740864a0483e74cff23c53e34e1dceee/imcompress.c#L7495-L7516"
},
{
"type": "REPORT",
"url": "https://hackmd.io/@haind-pwn/cfitsio-zdither0-dither-seed-oob-read"
},
{
"type": "REPORT",
"url": "https://www.vulncheck.com/advisories/cfitsio-through-4.7.0-heap-out-of-bounds-read-via-negative-zdither0-seed"
}
],
"related": [],
"schema_version": "1.7.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N",
"type": "CVSS_V4"
},
{
"score": "medium",
"type": "Ubuntu"
}
],
"upstream": [
"CVE-2026-111124"
]
}
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Browse all ATT&CK techniques and the vulnerabilities related to each.
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