Search
Find a vulnerability
Search criteria
2 vulnerabilities found for APT by Ubuntu
CVE-2026-109518 (GCVE-0-2026-109518)
Vulnerability from nvd – Published: 2026-11-04 15:49 – Updated: 2026-11-05 04:56
VLAI
EPSS
VEX
Title
APT RCE via hard link reuse
Summary
On Debian, Ubuntu, and derivative Linux distributions, an on-path attacker who can manipulate the HTTP traffic (including a malicious mirror or proxy) between an APT client and an archive server triggered by a package install can trick the client into installing an attacker-controlled unverified package and achieve remote code execution with root privileges.
The vulnerability is caused by the reuse of hard links and requires the client to follow redirects and retry the download of package files. It requires the client to have a non-zero Acquire::Retries configuration setting; the value 3 is the default starting with Debian 12 (bookworm) and Ubuntu 22.04 LTS (Jammy Jellyfish), so older releases are unaffected in a default configuration
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-11-04 00:00 UTC
Assigner
References
4 references
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Debian | APT |
Affected:
0 , < 1.2.36
(dpkg)
Affected: 1.4.0 , < 1.4.12 (dpkg) Affected: 1.6.0 , < 1.6.19 (dpkg) Affected: 1.8.0 , < 1.8.2.4 (dpkg) Affected: 1.8.3 , ≤ 1.8.5 (dpkg) Affected: 2.0.0 , < 2.0.12 (dpkg) Affected: 2.2.0 , < 2.2.5 (dpkg) Affected: 2.4.0 , < 2.4.15 (dpkg) Affected: 2.6.0 , < 2.6.2 (dpkg) Affected: 2.8.0 , < 2.8.4 (dpkg) Affected: 3.0.0 , < 3.0.4 (dpkg) Affected: 3.2.0 , < 3.2.1 (dpkg) Affected: 3.3.0 , < 3.3.6 (dpkg) |
|
| Ubuntu | APT |
Affected:
0 , < 1.0.1ubuntu2.24+esm4
(dpkg)
Affected: 1.2.0 , < 1.2.36+esm1 (dpkg) Affected: 1.6.0 , < 1.6.19+esm1 (dpkg) Affected: 2.0.0 , < 2.0.12+esm1 (dpkg) Affected: 2.4.0 , < 2.4.15ubuntu0.1 (dpkg) Affected: 2.8.0 , < 2.8.4ubuntu0.1 (dpkg) Affected: 3.2.0 , < 3.2.1ubuntu0.1 (dpkg) Affected: 3.3.0 , < 3.3.3ubuntu0.1 (dpkg) |
{
"containers": {
"adp": [
{
"providerMetadata": {
"dateUpdated": "2026-11-05T00:12:15.622Z",
"orgId": "af854a3a-2127-422b-91ae-364da2661108",
"shortName": "CVE"
},
"references": [
{
"url": "https://lists.debian.org/debian-lts-announce/2026/11/msg00004.html"
},
{
"url": "http://www.openwall.com/lists/oss-security/2026/11/04/12"
}
],
"title": "CVE Program Container"
},
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-109518",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "total"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-11-04T00:00:00+00:00",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-11-05T04:56:46.536Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"packageName": "apt",
"product": "APT",
"vendor": "Debian",
"versions": [
{
"lessThan": "1.2.36",
"status": "affected",
"version": "0",
"versionType": "dpkg"
},
{
"lessThan": "1.4.12",
"status": "affected",
"version": "1.4.0",
"versionType": "dpkg"
},
{
"lessThan": "1.6.19",
"status": "affected",
"version": "1.6.0",
"versionType": "dpkg"
},
{
"lessThan": "1.8.2.4",
"status": "affected",
"version": "1.8.0",
"versionType": "dpkg"
},
{
"lessThanOrEqual": "1.8.5",
"status": "affected",
"version": "1.8.3",
"versionType": "dpkg"
},
{
"lessThan": "2.0.12",
"status": "affected",
"version": "2.0.0",
"versionType": "dpkg"
},
{
"lessThan": "2.2.5",
"status": "affected",
"version": "2.2.0",
"versionType": "dpkg"
},
{
"lessThan": "2.4.15",
"status": "affected",
"version": "2.4.0",
"versionType": "dpkg"
},
{
"lessThan": "2.6.2",
"status": "affected",
"version": "2.6.0",
"versionType": "dpkg"
},
{
"lessThan": "2.8.4",
"status": "affected",
"version": "2.8.0",
"versionType": "dpkg"
},
{
"lessThan": "3.0.4",
"status": "affected",
"version": "3.0.0",
"versionType": "dpkg"
},
{
"lessThan": "3.2.1",
"status": "affected",
"version": "3.2.0",
"versionType": "dpkg"
},
{
"lessThan": "3.3.6",
"status": "affected",
"version": "3.3.0",
"versionType": "dpkg"
}
]
},
{
"defaultStatus": "unaffected",
"packageName": "apt",
"product": "APT",
"vendor": "Ubuntu",
"versions": [
{
"lessThan": "1.0.1ubuntu2.24+esm4",
"status": "affected",
"version": "0",
"versionType": "dpkg"
},
{
"lessThan": "1.2.36+esm1",
"status": "affected",
"version": "1.2.0",
"versionType": "dpkg"
},
{
"lessThan": "1.6.19+esm1",
"status": "affected",
"version": "1.6.0",
"versionType": "dpkg"
},
{
"lessThan": "2.0.12+esm1",
"status": "affected",
"version": "2.0.0",
"versionType": "dpkg"
},
{
"lessThan": "2.4.15ubuntu0.1",
"status": "affected",
"version": "2.4.0",
"versionType": "dpkg"
},
{
"lessThan": "2.8.4ubuntu0.1",
"status": "affected",
"version": "2.8.0",
"versionType": "dpkg"
},
{
"lessThan": "3.2.1ubuntu0.1",
"status": "affected",
"version": "3.2.0",
"versionType": "dpkg"
},
{
"lessThan": "3.3.3ubuntu0.1",
"status": "affected",
"version": "3.3.0",
"versionType": "dpkg"
}
]
}
],
"credits": [
{
"lang": "en",
"type": "reporter",
"value": "Max Justicz"
},
{
"lang": "en",
"type": "remediation developer",
"value": "Julian Andres Klode"
}
],
"descriptions": [
{
"lang": "en",
"value": "On Debian, Ubuntu, and derivative Linux distributions, an on-path attacker who can manipulate the HTTP traffic (including a malicious mirror or proxy) between an APT client and an archive server triggered by a package install can trick the client into installing an attacker-controlled unverified package and achieve remote code execution with root privileges.\n\n\n\nThe vulnerability is caused by the reuse of hard links and requires the client to follow redirects and retry the download of package files. It requires the client to have a non-zero\u00a0Acquire::Retries configuration setting; the value 3 is the default starting with Debian 12 (bookworm) and Ubuntu 22.04 LTS (Jammy Jellyfish), so older releases are unaffected in a default configuration"
}
],
"metrics": [
{
"cvssV4_0": {
"Automatable": "NOT_DEFINED",
"Recovery": "NOT_DEFINED",
"Safety": "NOT_DEFINED",
"attackComplexity": "LOW",
"attackRequirements": "PRESENT",
"attackVector": "NETWORK",
"baseScore": 7.7,
"baseSeverity": "HIGH",
"exploitMaturity": "NOT_DEFINED",
"privilegesRequired": "NONE",
"providerUrgency": "NOT_DEFINED",
"subAvailabilityImpact": "NONE",
"subConfidentialityImpact": "NONE",
"subIntegrityImpact": "NONE",
"userInteraction": "PASSIVE",
"valueDensity": "NOT_DEFINED",
"vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
"version": "4.0",
"vulnAvailabilityImpact": "HIGH",
"vulnConfidentialityImpact": "HIGH",
"vulnIntegrityImpact": "HIGH",
"vulnerabilityResponseEffort": "NOT_DEFINED"
},
"format": "CVSS",
"scenarios": [
{
"lang": "en",
"value": "GENERAL"
}
]
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-62",
"description": "CWE-62 UNIX hard link",
"lang": "en",
"type": "CWE"
}
]
},
{
"descriptions": [
{
"cweId": "CWE-367",
"description": "CWE-367 Time-of-check time-of-use (TOCTOU) race condition",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-11-04T15:49:02.951Z",
"orgId": "cc1ad9ee-3454-478d-9317-d3e869d708bc",
"shortName": "canonical"
},
"references": [
{
"tags": [
"vendor-advisory"
],
"url": "https://lists.debian.org/debian-security-announce/2026/msg00526.html"
},
{
"tags": [
"vendor-advisory"
],
"url": "https://ubuntu.com/security/notices/USN-8996-1"
}
],
"title": "APT RCE via hard link reuse",
"x_generator": {
"engine": "cvelib 1.8.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "cc1ad9ee-3454-478d-9317-d3e869d708bc",
"assignerShortName": "canonical",
"cveId": "CVE-2026-109518",
"datePublished": "2026-11-04T15:49:02.951Z",
"dateReserved": "2026-10-12T18:44:13.619Z",
"dateUpdated": "2026-11-05T04:56:46.536Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
CVE-2026-109518 (GCVE-0-2026-109518)
Vulnerability from cvelistv5 – Published: 2026-11-04 15:49 – Updated: 2026-11-05 04:56
VLAI
EPSS
VEX
Title
APT RCE via hard link reuse
Summary
On Debian, Ubuntu, and derivative Linux distributions, an on-path attacker who can manipulate the HTTP traffic (including a malicious mirror or proxy) between an APT client and an archive server triggered by a package install can trick the client into installing an attacker-controlled unverified package and achieve remote code execution with root privileges.
The vulnerability is caused by the reuse of hard links and requires the client to follow redirects and retry the download of package files. It requires the client to have a non-zero Acquire::Retries configuration setting; the value 3 is the default starting with Debian 12 (bookworm) and Ubuntu 22.04 LTS (Jammy Jellyfish), so older releases are unaffected in a default configuration
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-11-04 00:00 UTC
Assigner
References
4 references
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Debian | APT |
Affected:
0 , < 1.2.36
(dpkg)
Affected: 1.4.0 , < 1.4.12 (dpkg) Affected: 1.6.0 , < 1.6.19 (dpkg) Affected: 1.8.0 , < 1.8.2.4 (dpkg) Affected: 1.8.3 , ≤ 1.8.5 (dpkg) Affected: 2.0.0 , < 2.0.12 (dpkg) Affected: 2.2.0 , < 2.2.5 (dpkg) Affected: 2.4.0 , < 2.4.15 (dpkg) Affected: 2.6.0 , < 2.6.2 (dpkg) Affected: 2.8.0 , < 2.8.4 (dpkg) Affected: 3.0.0 , < 3.0.4 (dpkg) Affected: 3.2.0 , < 3.2.1 (dpkg) Affected: 3.3.0 , < 3.3.6 (dpkg) |
|
| Ubuntu | APT |
Affected:
0 , < 1.0.1ubuntu2.24+esm4
(dpkg)
Affected: 1.2.0 , < 1.2.36+esm1 (dpkg) Affected: 1.6.0 , < 1.6.19+esm1 (dpkg) Affected: 2.0.0 , < 2.0.12+esm1 (dpkg) Affected: 2.4.0 , < 2.4.15ubuntu0.1 (dpkg) Affected: 2.8.0 , < 2.8.4ubuntu0.1 (dpkg) Affected: 3.2.0 , < 3.2.1ubuntu0.1 (dpkg) Affected: 3.3.0 , < 3.3.3ubuntu0.1 (dpkg) |
{
"containers": {
"adp": [
{
"providerMetadata": {
"dateUpdated": "2026-11-05T00:12:15.622Z",
"orgId": "af854a3a-2127-422b-91ae-364da2661108",
"shortName": "CVE"
},
"references": [
{
"url": "https://lists.debian.org/debian-lts-announce/2026/11/msg00004.html"
},
{
"url": "http://www.openwall.com/lists/oss-security/2026/11/04/12"
}
],
"title": "CVE Program Container"
},
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-109518",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "total"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-11-04T00:00:00+00:00",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-11-05T04:56:46.536Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"packageName": "apt",
"product": "APT",
"vendor": "Debian",
"versions": [
{
"lessThan": "1.2.36",
"status": "affected",
"version": "0",
"versionType": "dpkg"
},
{
"lessThan": "1.4.12",
"status": "affected",
"version": "1.4.0",
"versionType": "dpkg"
},
{
"lessThan": "1.6.19",
"status": "affected",
"version": "1.6.0",
"versionType": "dpkg"
},
{
"lessThan": "1.8.2.4",
"status": "affected",
"version": "1.8.0",
"versionType": "dpkg"
},
{
"lessThanOrEqual": "1.8.5",
"status": "affected",
"version": "1.8.3",
"versionType": "dpkg"
},
{
"lessThan": "2.0.12",
"status": "affected",
"version": "2.0.0",
"versionType": "dpkg"
},
{
"lessThan": "2.2.5",
"status": "affected",
"version": "2.2.0",
"versionType": "dpkg"
},
{
"lessThan": "2.4.15",
"status": "affected",
"version": "2.4.0",
"versionType": "dpkg"
},
{
"lessThan": "2.6.2",
"status": "affected",
"version": "2.6.0",
"versionType": "dpkg"
},
{
"lessThan": "2.8.4",
"status": "affected",
"version": "2.8.0",
"versionType": "dpkg"
},
{
"lessThan": "3.0.4",
"status": "affected",
"version": "3.0.0",
"versionType": "dpkg"
},
{
"lessThan": "3.2.1",
"status": "affected",
"version": "3.2.0",
"versionType": "dpkg"
},
{
"lessThan": "3.3.6",
"status": "affected",
"version": "3.3.0",
"versionType": "dpkg"
}
]
},
{
"defaultStatus": "unaffected",
"packageName": "apt",
"product": "APT",
"vendor": "Ubuntu",
"versions": [
{
"lessThan": "1.0.1ubuntu2.24+esm4",
"status": "affected",
"version": "0",
"versionType": "dpkg"
},
{
"lessThan": "1.2.36+esm1",
"status": "affected",
"version": "1.2.0",
"versionType": "dpkg"
},
{
"lessThan": "1.6.19+esm1",
"status": "affected",
"version": "1.6.0",
"versionType": "dpkg"
},
{
"lessThan": "2.0.12+esm1",
"status": "affected",
"version": "2.0.0",
"versionType": "dpkg"
},
{
"lessThan": "2.4.15ubuntu0.1",
"status": "affected",
"version": "2.4.0",
"versionType": "dpkg"
},
{
"lessThan": "2.8.4ubuntu0.1",
"status": "affected",
"version": "2.8.0",
"versionType": "dpkg"
},
{
"lessThan": "3.2.1ubuntu0.1",
"status": "affected",
"version": "3.2.0",
"versionType": "dpkg"
},
{
"lessThan": "3.3.3ubuntu0.1",
"status": "affected",
"version": "3.3.0",
"versionType": "dpkg"
}
]
}
],
"credits": [
{
"lang": "en",
"type": "reporter",
"value": "Max Justicz"
},
{
"lang": "en",
"type": "remediation developer",
"value": "Julian Andres Klode"
}
],
"descriptions": [
{
"lang": "en",
"value": "On Debian, Ubuntu, and derivative Linux distributions, an on-path attacker who can manipulate the HTTP traffic (including a malicious mirror or proxy) between an APT client and an archive server triggered by a package install can trick the client into installing an attacker-controlled unverified package and achieve remote code execution with root privileges.\n\n\n\nThe vulnerability is caused by the reuse of hard links and requires the client to follow redirects and retry the download of package files. It requires the client to have a non-zero\u00a0Acquire::Retries configuration setting; the value 3 is the default starting with Debian 12 (bookworm) and Ubuntu 22.04 LTS (Jammy Jellyfish), so older releases are unaffected in a default configuration"
}
],
"metrics": [
{
"cvssV4_0": {
"Automatable": "NOT_DEFINED",
"Recovery": "NOT_DEFINED",
"Safety": "NOT_DEFINED",
"attackComplexity": "LOW",
"attackRequirements": "PRESENT",
"attackVector": "NETWORK",
"baseScore": 7.7,
"baseSeverity": "HIGH",
"exploitMaturity": "NOT_DEFINED",
"privilegesRequired": "NONE",
"providerUrgency": "NOT_DEFINED",
"subAvailabilityImpact": "NONE",
"subConfidentialityImpact": "NONE",
"subIntegrityImpact": "NONE",
"userInteraction": "PASSIVE",
"valueDensity": "NOT_DEFINED",
"vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
"version": "4.0",
"vulnAvailabilityImpact": "HIGH",
"vulnConfidentialityImpact": "HIGH",
"vulnIntegrityImpact": "HIGH",
"vulnerabilityResponseEffort": "NOT_DEFINED"
},
"format": "CVSS",
"scenarios": [
{
"lang": "en",
"value": "GENERAL"
}
]
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-62",
"description": "CWE-62 UNIX hard link",
"lang": "en",
"type": "CWE"
}
]
},
{
"descriptions": [
{
"cweId": "CWE-367",
"description": "CWE-367 Time-of-check time-of-use (TOCTOU) race condition",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-11-04T15:49:02.951Z",
"orgId": "cc1ad9ee-3454-478d-9317-d3e869d708bc",
"shortName": "canonical"
},
"references": [
{
"tags": [
"vendor-advisory"
],
"url": "https://lists.debian.org/debian-security-announce/2026/msg00526.html"
},
{
"tags": [
"vendor-advisory"
],
"url": "https://ubuntu.com/security/notices/USN-8996-1"
}
],
"title": "APT RCE via hard link reuse",
"x_generator": {
"engine": "cvelib 1.8.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "cc1ad9ee-3454-478d-9317-d3e869d708bc",
"assignerShortName": "canonical",
"cveId": "CVE-2026-109518",
"datePublished": "2026-11-04T15:49:02.951Z",
"dateReserved": "2026-10-12T18:44:13.619Z",
"dateUpdated": "2026-11-05T04:56:46.536Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}