USN-8719-1 (UBUNTU-CVE-2025-49506)
Vulnerability from osv_ubuntu – Published: 2026-09-03 12:35 – Updated: 2026-09-03 12:35 – Source website
VLAI
Summary
apr-util vulnerabilities
Details
It was discovered that APR-util incorrectly performed password hash comparisons in a way that was not constant-time. An attacker could possibly use this issue to obtain sensitive information. (CVE-2025-49506)
It was discovered that APR-util incorrectly handled recursive XML element quoting. An attacker could possibly use this issue to cause applications using APR-util to crash, resulting in a denial of service. (CVE-2026-32327)
It was discovered that the APR-util Redis client incorrectly handled certain network data, resulting in a heap-based buffer overflow. A remote attacker could possibly use this issue to cause APR-util applications to crash or execute arbitrary code. This issue only affected Ubuntu 18.04 LTS, Ubuntu 20.04 LTS, Ubuntu 22.04 LTS, Ubuntu 24.04 LTS, and Ubuntu 26.04 LTS. (CVE-2026-34501)
It was discovered that the APR-util memcached client incorrectly handled certain network data, resulting in a heap-based buffer overflow. A remote attacker could possibly use this issue to cause APR-util applications to crash or execute arbitrary code. (CVE-2026-34502)
References
{
"affected": [
{
"database_specific": {
"cves_map": {
"cves": [
{
"id": "CVE-2025-49506",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2026-32327",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2026-34501",
"severity": [
{
"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-2026-34502",
"severity": [
{
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"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
}
],
"ecosystem": "Ubuntu:Pro:14.04:LTS"
}
},
"ecosystem_specific": {
"availability": "Available with Ubuntu Pro with Legacy support add-on: https://ubuntu.com/pro",
"binaries": [
{
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"binary_version": "1.5.3-1ubuntu0.1~esm3"
},
{
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},
{
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},
{
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},
{
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"binary_version": "1.5.3-1ubuntu0.1~esm3"
},
{
"binary_name": "libaprutil1-ldap",
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}
]
},
"package": {
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"name": "apr-util",
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},
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"versions": [
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"1.5.2-1build1",
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"1.5.3-1",
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"1.5.3-1ubuntu0.1~esm2"
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},
{
"database_specific": {
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{
"id": "CVE-2025-49506",
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"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
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{
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},
{
"id": "CVE-2026-32327",
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{
"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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{
"score": "medium",
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}
]
},
{
"id": "CVE-2026-34501",
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{
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"type": "CVSS_V3"
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{
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}
]
},
{
"id": "CVE-2026-34502",
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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"
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{
"score": "medium",
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}
]
}
],
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}
},
"ecosystem_specific": {
"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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{
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},
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{
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"id": "CVE-2025-49506",
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{
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},
{
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"type": "Ubuntu"
}
]
},
{
"id": "CVE-2026-32327",
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{
"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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}
]
},
{
"id": "CVE-2026-34501",
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{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
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{
"score": "medium",
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}
]
},
{
"id": "CVE-2026-34502",
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"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
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},
{
"score": "medium",
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}
]
}
],
"ecosystem": "Ubuntu:Pro:18.04:LTS"
}
},
"ecosystem_specific": {
"availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
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},
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},
{
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},
{
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},
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{
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{
"id": "CVE-2026-32327",
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{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H",
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{
"id": "CVE-2026-34501",
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]
},
{
"id": "CVE-2026-34502",
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]
}
],
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}
},
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"availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
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{
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{
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{
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},
"package": {
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},
{
"database_specific": {
"cves_map": {
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{
"id": "CVE-2025-49506",
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{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
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{
"score": "medium",
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]
},
{
"id": "CVE-2026-32327",
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{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2026-34501",
"severity": [
{
"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-2026-34502",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
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},
{
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}
]
}
],
"ecosystem": "Ubuntu:22.04:LTS"
}
},
"ecosystem_specific": {
"availability": "No subscription required",
"binaries": [
{
"binary_name": "libaprutil1",
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},
{
"binary_name": "libaprutil1-dbd-mysql",
"binary_version": "1.6.1-5ubuntu4.22.04.3"
},
{
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},
{
"database_specific": {
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{
"id": "CVE-2025-49506",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2026-32327",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2026-34501",
"severity": [
{
"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-2026-34502",
"severity": [
{
"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"
}
]
}
],
"ecosystem": "Ubuntu:24.04:LTS"
}
},
"ecosystem_specific": {
"availability": "No subscription required",
"binaries": [
{
"binary_name": "libaprutil1-dbd-mysql",
"binary_version": "1.6.3-1.1ubuntu7.1"
},
{
"binary_name": "libaprutil1-dbd-odbc",
"binary_version": "1.6.3-1.1ubuntu7.1"
},
{
"binary_name": "libaprutil1-dbd-pgsql",
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},
{
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},
{
"binary_name": "libaprutil1-ldap",
"binary_version": "1.6.3-1.1ubuntu7.1"
},
{
"binary_name": "libaprutil1t64",
"binary_version": "1.6.3-1.1ubuntu7.1"
}
]
},
"package": {
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},
{
"database_specific": {
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{
"id": "CVE-2025-49506",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2026-32327",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2026-34501",
"severity": [
{
"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-2026-34502",
"severity": [
{
"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"
}
]
}
],
"ecosystem": "Ubuntu:26.04:LTS"
}
},
"ecosystem_specific": {
"availability": "No subscription required",
"binaries": [
{
"binary_name": "libaprutil1-dbd-mysql",
"binary_version": "1.6.3-3ubuntu3.1"
},
{
"binary_name": "libaprutil1-dbd-odbc",
"binary_version": "1.6.3-3ubuntu3.1"
},
{
"binary_name": "libaprutil1-dbd-pgsql",
"binary_version": "1.6.3-3ubuntu3.1"
},
{
"binary_name": "libaprutil1-dbd-sqlite3",
"binary_version": "1.6.3-3ubuntu3.1"
},
{
"binary_name": "libaprutil1-ldap",
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},
{
"binary_name": "libaprutil1t64",
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}
]
},
"package": {
"ecosystem": "Ubuntu:26.04:LTS",
"name": "apr-util",
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},
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],
"aliases": [],
"details": "It was discovered that APR-util incorrectly performed password hash\ncomparisons in a way that was not constant-time.\nAn attacker could possibly use this issue to obtain sensitive information.\n(CVE-2025-49506)\n\nIt was discovered that APR-util incorrectly handled recursive XML element\nquoting. An attacker could possibly use this issue to cause applications\nusing APR-util to crash, resulting in a denial of service.\n(CVE-2026-32327)\n\nIt was discovered that the APR-util Redis client incorrectly handled\ncertain network data, resulting in a heap-based buffer overflow. A remote\nattacker could possibly use this issue to cause APR-util applications to\ncrash or execute arbitrary code. This issue only affected Ubuntu 18.04 LTS,\nUbuntu 20.04 LTS, Ubuntu 22.04 LTS, Ubuntu 24.04 LTS, and Ubuntu 26.04 LTS.\n(CVE-2026-34501)\n\nIt was discovered that the APR-util memcached client incorrectly handled\ncertain network data, resulting in a heap-based buffer overflow. A remote\nattacker could possibly use this issue to cause APR-util applications to\ncrash or execute arbitrary code. (CVE-2026-34502)",
"id": "USN-8719-1",
"modified": "2026-09-03T12:35:55Z",
"published": "2026-09-03T12:35:55Z",
"references": [
{
"type": "ADVISORY",
"url": "https://ubuntu.com/security/notices/USN-8719-1"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2025-49506"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2026-32327"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2026-34501"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2026-34502"
}
],
"related": [],
"schema_version": "1.7.0",
"summary": "apr-util vulnerabilities",
"upstream": [
"UBUNTU-CVE-2025-49506",
"UBUNTU-CVE-2026-32327",
"UBUNTU-CVE-2026-34501",
"UBUNTU-CVE-2026-34502"
]
}
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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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