175 lines
7.9 KiB
JSON
175 lines
7.9 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2026-91189",
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"assignerOrgId": "e51fbebd-6053-4e49-959f-1b94eeb69a2c",
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"state": "PUBLISHED",
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"assignerShortName": "eclipse",
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"dateReserved": "2026-09-23T13:43:04.319Z",
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"datePublished": "2026-10-20T14:53:44.860Z",
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"dateUpdated": "2026-10-20T15:25:24.066Z"
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},
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"containers": {
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"cna": {
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"providerMetadata": {
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"orgId": "e51fbebd-6053-4e49-959f-1b94eeb69a2c",
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"shortName": "eclipse",
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"dateUpdated": "2026-10-20T14:53:44.860Z"
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},
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"title": "GUIX binary resource loader: unvalidated glyph range causes an integer underflow and a heap out-of-bounds write when loading an untrusted font or theme",
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"problemTypes": [
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{
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"descriptions": [
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{
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"lang": "en",
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"cweId": "CWE-190",
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"description": "CWE-190 Integer Overflow or Wraparound",
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"type": "CWE"
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}
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]
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},
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{
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"descriptions": [
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{
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"lang": "en",
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"cweId": "CWE-680",
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"description": "CWE-680 Integer Overflow to Buffer Overflow",
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"type": "CWE"
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}
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]
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},
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{
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"descriptions": [
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{
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"lang": "en",
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"cweId": "CWE-787",
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"description": "CWE-787 Out-of-bounds Write",
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"type": "CWE"
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}
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]
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}
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],
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"affected": [
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{
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"vendor": "Eclipse Foundation",
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"product": "Eclipse ThreadX - GUIX",
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"packageName": "GUIX",
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"versions": [
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{
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"status": "affected",
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"version": "0",
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"lessThanOrEqual": "6.5.1.202602a",
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"versionType": "semver"
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},
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{
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"status": "unaffected",
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"version": "6.5.2.202603"
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}
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],
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"defaultStatus": "unaffected"
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}
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],
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"descriptions": [
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{
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"lang": "en",
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"value": "The GUIX binary resource loader never checks that a font page's glyph range is well formed. `gx_page_header_first_glyph` and `gx_page_header_last_glyph` are read verbatim from the file and only the upper bound of `last_glyph` is validated, so a page declaring `first_glyph > last_glyph` makes `last - first + 1` underflow to a very large unsigned count.\n\n\n\nThat count is multiplied by a glyph record size to reserve the load buffer, and the multiply is unchecked, so it wraps to a small value and the loader allocates a buffer far smaller than the data it is about to write. The load pass then recomputes the count in a narrower type and writes attacker-controlled glyph records into the undersized buffer.",
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"supportingMedia": [
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{
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"type": "text/html",
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"base64": false,
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"value": "<p>The GUIX binary resource loader never checks that a font page's glyph range is well formed. `gx_page_header_first_glyph` and `gx_page_header_last_glyph` are read verbatim from the file and only the upper bound of `last_glyph` is validated, so a page declaring `first_glyph > last_glyph` makes `last - first + 1` underflow to a very large unsigned count.</p><p>That count is multiplied by a glyph record size to reserve the load buffer, and the multiply is unchecked, so it wraps to a small value and the loader allocates a buffer far smaller than the data it is about to write. The load pass then recomputes the count in a narrower type and writes attacker-controlled glyph records into the undersized buffer.</p>"
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}
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]
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}
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],
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"references": [
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{
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"url": "https://github.com/eclipse-threadx/guix/security/advisories/GHSA-hgcj-22cg-4hfv"
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}
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],
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"metrics": [
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{
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"format": "CVSS",
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"scenarios": [
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{
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"lang": "en",
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"value": "GENERAL"
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}
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],
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"cvssV4_0": {
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"attackVector": "LOCAL",
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"attackComplexity": "HIGH",
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"attackRequirements": "NONE",
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"privilegesRequired": "NONE",
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"userInteraction": "ACTIVE",
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"vulnConfidentialityImpact": "HIGH",
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"subConfidentialityImpact": "NONE",
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"vulnIntegrityImpact": "HIGH",
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"subIntegrityImpact": "NONE",
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"vulnAvailabilityImpact": "HIGH",
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"subAvailabilityImpact": "NONE",
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"exploitMaturity": "NOT_DEFINED",
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"Safety": "NOT_DEFINED",
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"Automatable": "NOT_DEFINED",
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"Recovery": "NOT_DEFINED",
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"valueDensity": "NOT_DEFINED",
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"vulnerabilityResponseEffort": "NOT_DEFINED",
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"providerUrgency": "NOT_DEFINED",
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"version": "4.0",
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"baseSeverity": "HIGH",
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"baseScore": 7.1,
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"vectorString": "CVSS:4.0/AV:L/AC:H/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N"
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}
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}
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],
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"credits": [
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{
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"lang": "en",
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"value": "adawn0106",
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"type": "reporter"
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}
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],
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"source": {
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"discovery": "UNKNOWN"
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},
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"x_generator": {
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"engine": "Vulnogram 1.0.5"
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}
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},
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"adp": [
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{
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"metrics": [
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{
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"other": {
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"type": "ssvc",
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"content": {
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"timestamp": "2026-10-20T15:24:56.279111Z",
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"id": "CVE-2026-91189",
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"options": [
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{
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"Exploitation": "none"
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},
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{
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"Automatable": "no"
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},
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{
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"Technical Impact": "total"
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}
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],
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"role": "CISA Coordinator",
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"version": "2.0.3"
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}
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}
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}
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],
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"title": "CISA ADP Vulnrichment",
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"providerMetadata": {
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"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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"shortName": "CISA-ADP",
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"dateUpdated": "2026-10-20T15:25:24.066Z"
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}
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}
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]
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}
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} |