CVE-2026-111124
Full vulnerability record from the local CVENow database.
Description
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
MEDIUM
CVSS score
6.9
(v4.0)
Vulnerability status
Modified
Source identifier
Published
2026-10-15 19:17:25.627000
Last modified
2026-10-26 16:17:12.730000
View original CVE JSON
{
"id": "CVE-2026-111124",
"sourceIdentifier": "[email protected]",
"published": "2026-10-15T19:17:25.627",
"lastModified": "2026-10-26T16:17:12.730",
"vulnStatus": "Modified",
"cveTags": [],
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"value": "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."
}
],
"affected": [
{
"source": "[email protected]",
"affectedData": [
{
"vendor": "HEASARC",
"product": "cfitsio",
"defaultStatus": "unaffected",
"collectionURL": "https://github.com",
"repo": "https://github.com/HEASARC/cfitsio",
"versions": [
{
"version": "0",
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"versionType": "semver",
"status": "affected"
}
]
}
]
}
],
"metrics": {
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"type": "Secondary",
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"vectorString": "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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
"baseScore": 6.9,
"baseSeverity": "MEDIUM",
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"attackComplexity": "LOW",
"attackRequirements": "NONE",
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"vulnConfidentialityImpact": "LOW",
"vulnIntegrityImpact": "NONE",
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"subIntegrityImpact": "NONE",
"subAvailabilityImpact": "NONE",
"exploitMaturity": "NOT_DEFINED",
"confidentialityRequirement": "NOT_DEFINED",
"integrityRequirement": "NOT_DEFINED",
"availabilityRequirement": "NOT_DEFINED",
"modifiedAttackVector": "NOT_DEFINED",
"modifiedAttackComplexity": "NOT_DEFINED",
"modifiedAttackRequirements": "NOT_DEFINED",
"modifiedPrivilegesRequired": "NOT_DEFINED",
"modifiedUserInteraction": "NOT_DEFINED",
"modifiedVulnConfidentialityImpact": "NOT_DEFINED",
"modifiedVulnIntegrityImpact": "NOT_DEFINED",
"modifiedVulnAvailabilityImpact": "NOT_DEFINED",
"modifiedSubConfidentialityImpact": "NOT_DEFINED",
"modifiedSubIntegrityImpact": "NOT_DEFINED",
"modifiedSubAvailabilityImpact": "NOT_DEFINED",
"Safety": "NOT_DEFINED",
"Automatable": "NOT_DEFINED",
"Recovery": "NOT_DEFINED",
"valueDensity": "NOT_DEFINED",
"vulnerabilityResponseEffort": "NOT_DEFINED",
"providerUrgency": "NOT_DEFINED"
}
}
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{
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"type": "Primary",
"cvssData": {
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"id": "CVE-2026-111124",
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"weaknesses": [
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"type": "Secondary",
"description": [
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"configurations": [
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"references": [
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"url": "https://github.com/HEASARC/cfitsio",
"source": "[email protected]",
"tags": [
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},
{
"url": "https://github.com/HEASARC/cfitsio/blob/d6d27653740864a0483e74cff23c53e34e1dceee/imcompress.c#L5353-L5362",
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"source": "[email protected]",
"tags": [
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},
{
"url": "https://hackmd.io/@haind-pwn/cfitsio-zdither0-dither-seed-oob-read",
"source": "[email protected]",
"tags": [
"Exploit",
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"Vendor Advisory"
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},
{
"url": "https://www.vulncheck.com/advisories/cfitsio-through-4.7.0-heap-out-of-bounds-read-via-negative-zdither0-seed",
"source": "[email protected]",
"tags": [
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