USN-8794-1 (UBUNTU-CVE-2026-15588)
Vulnerability from osv_ubuntu – Published: 2026-09-21 16:25 – Updated: 2026-09-21 16:25 – Source website
VLAI
Summary
glib2.0 vulnerabilities
Details
It was discovered that GLib's GDBus authentication mechanism failed to enforce length limitations on data lines read from a client. An unauthenticated attacker could exploit this to cause a denial of service via resource exhaustion. (CVE-2026-15588)
It was discovered that the xdgmime library in GLib had a heap-based buffer overflow. An attacker-controlled MIME magic file could cause an out-of-bounds write on little-endian systems. (CVE-2026-16118)
It was discovered that GLib had an off-by-one error in the GVariant serialiser. An attacker could use this to cause an out-of-bounds read, leading to information disclosure or a denial of service. (CVE-2026-58010)
It was discovered that GLib had an out-of-bounds read in GDateTime. An attacker could use this to corrupt date output and cause a denial of service. (CVE-2026-58011)
It was discovered that GLib's g_regex_replace() function had a buffer over-read when used with the G_REGEX_RAW flag. An attacker could use this to cause information disclosure or a denial of service. (CVE-2026-58012)
It was discovered that GLib's GIOChannel had a buffer over-read when using a custom line terminator. An attacker could use this to cause information disclosure or a denial of service. (CVE-2026-58013)
It was discovered that GLib's GKeyFile had an off-by-one error when loading a key file with an empty value. An attacker could use this to cause an out-of-bounds access or a denial of service. (CVE-2026-58014)
It was discovered that GLib's DBUS_COOKIE_SHA1 authentication mechanism failed to validate the cookie_context parameter. A malicious D-Bus server could use this to read arbitrary files from the client. (CVE-2026-58015)
It was discovered that GLib's D-Bus introspection XML parser had a state confusion issue. An attacker could use this to cause an out-of-bounds read and denial of service. (CVE-2026-58016)
References
{
"affected": [
{
"database_specific": {
"cves_map": {
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{
"id": "CVE-2026-15588",
"severity": [
{
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},
{
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},
{
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{
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},
{
"id": "CVE-2026-58012",
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{
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{
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{
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{
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{
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],
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}
},
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"availability": "Available with Ubuntu Pro with Legacy support add-on: https://ubuntu.com/pro",
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},
{
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}
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"id": "CVE-2026-15588",
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{
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},
{
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"type": "Ubuntu"
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]
},
{
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},
{
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]
},
{
"id": "CVE-2026-58010",
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{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L",
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},
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H",
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{
"id": "CVE-2026-58011",
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"type": "CVSS_V3"
},
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2026-58012",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L",
"type": "CVSS_V3"
},
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H",
"type": "CVSS_V3"
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{
"score": "medium",
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]
},
{
"id": "CVE-2026-58013",
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{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L",
"type": "CVSS_V3"
},
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H",
"type": "CVSS_V3"
},
{
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"type": "Ubuntu"
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]
},
{
"id": "CVE-2026-58014",
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{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L",
"type": "CVSS_V3"
},
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H",
"type": "CVSS_V3"
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{
"score": "medium",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2026-58015",
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"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N",
"type": "CVSS_V3"
},
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
"type": "CVSS_V3"
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{
"score": "medium",
"type": "Ubuntu"
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]
},
{
"id": "CVE-2026-58016",
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{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H",
"type": "CVSS_V3"
},
{
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"type": "Ubuntu"
}
]
}
],
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},
{
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"id": "CVE-2026-15588",
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{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2026-16118",
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{
"score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2026-58010",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L",
"type": "CVSS_V3"
},
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
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}
]
},
{
"id": "CVE-2026-58011",
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"binary_name": "libglib2.0-0t64",
"binary_version": "2.88.0-1ubuntu0.1"
},
{
"binary_name": "libglib2.0-bin",
"binary_version": "2.88.0-1ubuntu0.1"
},
{
"binary_name": "libglib2.0-data",
"binary_version": "2.88.0-1ubuntu0.1"
},
{
"binary_name": "libglib2.0-dev-bin",
"binary_version": "2.88.0-1ubuntu0.1"
},
{
"binary_name": "libglib2.0-tests",
"binary_version": "2.88.0-1ubuntu0.1"
}
]
},
"package": {
"ecosystem": "Ubuntu:26.04:LTS",
"name": "glib2.0",
"purl": "pkg:deb/ubuntu/glib2.0@2.88.0-1ubuntu0.1?arch=source\u0026distro=resolute"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "2.88.0-1ubuntu0.1"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"2.86.0-2",
"2.86.1-1",
"2.86.1-2",
"2.86.2-1",
"2.86.3-1",
"2.86.3-4",
"2.87.2-2",
"2.87.2-3",
"2.87.3-1",
"2.88.0-1"
]
}
],
"aliases": [],
"details": "It was discovered that GLib\u0027s GDBus authentication mechanism failed to\nenforce length limitations on data lines read from a client. An\nunauthenticated attacker could exploit this to cause a denial of service\nvia resource exhaustion. (CVE-2026-15588)\n\nIt was discovered that the xdgmime library in GLib had a heap-based\nbuffer overflow. An attacker-controlled MIME magic file could cause an\nout-of-bounds write on little-endian systems. (CVE-2026-16118)\n\nIt was discovered that GLib had an off-by-one error in the GVariant\nserialiser. An attacker could use this to cause an out-of-bounds read,\nleading to information disclosure or a denial of service.\n(CVE-2026-58010)\n\nIt was discovered that GLib had an out-of-bounds read in GDateTime. An\nattacker could use this to corrupt date output and cause a denial of\nservice. (CVE-2026-58011)\n\nIt was discovered that GLib\u0027s g_regex_replace() function had a buffer\nover-read when used with the G_REGEX_RAW flag. An attacker could use\nthis to cause information disclosure or a denial of service.\n(CVE-2026-58012)\n\nIt was discovered that GLib\u0027s GIOChannel had a buffer over-read when\nusing a custom line terminator. An attacker could use this to cause\ninformation disclosure or a denial of service. (CVE-2026-58013)\n\nIt was discovered that GLib\u0027s GKeyFile had an off-by-one error when\nloading a key file with an empty value. An attacker could use this to\ncause an out-of-bounds access or a denial of service. (CVE-2026-58014)\n\nIt was discovered that GLib\u0027s DBUS_COOKIE_SHA1 authentication mechanism\nfailed to validate the cookie_context parameter. A malicious D-Bus\nserver could use this to read arbitrary files from the client.\n(CVE-2026-58015)\n\nIt was discovered that GLib\u0027s D-Bus introspection XML parser had a\nstate confusion issue. An attacker could use this to cause an\nout-of-bounds read and denial of service. (CVE-2026-58016)",
"id": "USN-8794-1",
"modified": "2026-09-21T16:25:01Z",
"published": "2026-09-21T16:25:01Z",
"references": [
{
"type": "ADVISORY",
"url": "https://ubuntu.com/security/notices/USN-8794-1"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2026-15588"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2026-16118"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2026-58010"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2026-58011"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2026-58012"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2026-58013"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2026-58014"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2026-58015"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2026-58016"
}
],
"related": [],
"schema_version": "1.7.0",
"summary": "glib2.0 vulnerabilities",
"upstream": [
"UBUNTU-CVE-2026-15588",
"UBUNTU-CVE-2026-16118",
"UBUNTU-CVE-2026-58010",
"UBUNTU-CVE-2026-58011",
"UBUNTU-CVE-2026-58012",
"UBUNTU-CVE-2026-58013",
"UBUNTU-CVE-2026-58014",
"UBUNTU-CVE-2026-58015",
"UBUNTU-CVE-2026-58016"
]
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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