Podman: podman: quadlet install --replace non-truncating write retains removed host-access directives
Products / packages Red Hat Enterprise Linux 10 · Red Hat Enterprise Linux 9 · Red Hat Ansible Automation Platform 2 · 7 more
Published
Severity and exploitation
KEV coverage does not rule out exploitation.
Assessment vector
CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:L/I:L/A:LSeverity
medium4.2CVSS measures technical severity, not the likelihood of an attack.
Known exploitation
Not listed in the checked CISA KEV catalog
Absence from CISA KEV does not rule out attacks.
Public exploit
Exploit reference published
Source-linked evidence; not proof of attacks in the wild or independent validation.
Remediation
Fix status not established
No structured fix or guidance is available here. Check the latest publisher advisory.
What this means
The 'podman quadlet install --replace' command may retain removed host-access directives from the original Quadlet if the new Quadlet is smaller, potentially leading to undesirable behavior. This issue affects Podman and is caused by a non-truncating write when the initial reflink copy attempt fails. The vulnerable code paths are in quadlet.go and reflink_linux.go.
Summarized by @cf/meta/llama-3.3-70b-instruct-fp8-fast. Verify details against the original sources.Attack conditions
No attack-condition excerpt has been identified here. Review the full source description and references for authentication, network access, and configuration requirements.
Review supporting sources →Affected versions
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Red Hat · redhat
Red Hat Enterprise Linux 10
1 range
Red Hat · redhat
Red Hat Enterprise Linux 10
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unaffected
7:5.8.2-9.el10_2 → before *
rpm versions
Other versions: affected
Product identifiers (CPE)
cpe:/o:redhat:enterprise_linux:10.2Red Hat · redhat
Red Hat Enterprise Linux 9
1 range
Red Hat · redhat
Red Hat Enterprise Linux 9
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unaffected
6:5.8.2-7.el9_8 → before *
rpm versions
Other versions: affected
Product identifiers (CPE)
cpe:/a:redhat:enterprise_linux:9::appstreamRed Hat · redhat
Red Hat Ansible Automation Platform 2
0 ranges
Red Hat · redhat
Red Hat Ansible Automation Platform 2
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Other versions: unaffected
Product identifiers (CPE)
cpe:/a:redhat:ansible_automation_platform:2Red Hat · redhat
Red Hat Ansible Automation Platform 2
0 ranges
Red Hat · redhat
Red Hat Ansible Automation Platform 2
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Other versions: unaffected
Product identifiers (CPE)
cpe:/a:redhat:ansible_automation_platform:2Red Hat · redhat
Red Hat Ansible Automation Platform 2
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Red Hat · redhat
Red Hat Ansible Automation Platform 2
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Other versions: unaffected
Product identifiers (CPE)
cpe:/a:redhat:ansible_automation_platform:2Red Hat · redhat
Red Hat Ansible Automation Platform 2
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Red Hat · redhat
Red Hat Ansible Automation Platform 2
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Other versions: unaffected
Product identifiers (CPE)
cpe:/a:redhat:ansible_automation_platform:2Red Hat · redhat
Red Hat Enterprise Linux 8
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Red Hat · redhat
Red Hat Enterprise Linux 8
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Other versions: unaffected
Product identifiers (CPE)
cpe:/a:redhat:enterprise_linux:8Red Hat · redhat
Red Hat Hardened Images
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Red Hat · redhat
Red Hat Hardened Images
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Other versions: unaffected
Product identifiers (CPE)
cpe:/a:redhat:hummingbird:1Red Hat · redhat
Red Hat OpenShift Container Platform 4
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Red Hat · redhat
Red Hat OpenShift Container Platform 4
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Other versions: unaffected
Product identifiers (CPE)
cpe:/a:redhat:openshift:4Red Hat · redhat
Red Hat OpenShift Container Platform 5
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Red Hat · redhat
Red Hat OpenShift Container Platform 5
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Other versions: unaffected
Product identifiers (CPE)
cpe:/a:redhat:openshift:5Red Hat · redhat
Red Hat OpenShift Dev Spaces
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Red Hat · redhat
Red Hat OpenShift Dev Spaces
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Other versions: unaffected
Product identifiers (CPE)
cpe:/a:redhat:openshift_devspaces:3Red Hat · redhat
Red Hat OpenShift Dev Spaces
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Red Hat · redhat
Red Hat OpenShift Dev Spaces
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Other versions: unaffected
Product identifiers (CPE)
cpe:/a:redhat:openshift_devspaces:3Red Hat · redhat
Red Hat OpenShift Dev Spaces
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Red Hat · redhat
Red Hat OpenShift Dev Spaces
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Other versions: unaffected
Product identifiers (CPE)
cpe:/a:redhat:openshift_devspaces:3Red Hat · redhat
Red Hat OpenShift Virtualization 4
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Red Hat · redhat
Red Hat OpenShift Virtualization 4
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Other versions: unaffected
Product identifiers (CPE)
cpe:/a:redhat:container_native_virtualization:4Red Hat · redhat
Red Hat Quay 3
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Red Hat · redhat
Red Hat Quay 3
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Other versions: unaffected
Product identifiers (CPE)
cpe:/a:redhat:quay:3Red Hat · redhat
Red Hat Quay 3
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Red Hat · redhat
Red Hat Quay 3
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Other versions: unaffected
Product identifiers (CPE)
cpe:/a:redhat:quay:3What to do
Compare your installed product and version with the affected versions above. A matching product name alone does not confirm exposure.
No structured fix or remediation guidance is available here. Check the full source description and vendor’s latest advisory for a patch or workaround; do not assume another version is safe.
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Public exploit evidence
The sources identify public exploit references. We have not independently tested them; their availability does not establish exploitation in the wild.
podman-container-tools/podman · issues/29013 ↗Attributed to CISA-ADPOriginal source description
Read the full publisher description
The 'podman quadlet install --replace' command opens the existing destination file with O_CREATE|O_WRONLY but omits O_TRUNC. When the initial reflink copy attempt fails (common on non-reflink-capable filesystems including many RHEL default XFS configurations), the fallback in ReflinkOrCopy uses io.Copy which performs a non-truncating write. If the original Quadlet is larger than the new Quadlet, the file is not truncated and content from the original is preserved. The command completes with no warning.
There is no risk of information leakage as the user already had access to the Quadlet in order to replace it, and in most cases, this would only lead to invalid Quadlet files. However, security-related options from the end of the old Quadlet could be included in the new Quadlet, and if the truncation resulted in a valid Quadlet file, this could result in undesirable behavior. For example, running podman quadlet install --replace to remove a single line from the end of a Quadlet - including security-sensitive content, like AddCapability - will fail, and the option will continue to be used. Further, with Volume Quadlets, this can include additional mounts which can cause content to be unintentionally exposed into containers. If, later, the image is updated then compromised content might be leaked to an attacker.
The vulnerable code paths are in pkg/domain/infra/abi/quadlet.go (lines 338-360, O_CREATE|O_WRONLY without O_TRUNC) and vendor/go.podman.io/storage/pkg/fileutils/reflink_linux.go (lines 12-19, non-truncating io.Copy fallback).
References
6 sourcesInside the record
Evidence available
Describes the evidence in this view, not whether the product is safe.
Original records
CVE-2026-19730View the latest unmodified CVE JSON from the official source. It may be newer than this imported page.
cve.new JSON →Underlying weaknesses
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Contributing organizations · 2
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Source updated
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Last imported by cve.new
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What changed
Follow changes- CVE · CVE-2026-19730
Observed 2026-11-05T19:39:12.048Z · upstream updated 2026-11-05T19:26:51.103Z
Product or version evidence changed
before
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[ { "vendor": "Red Hat", "name": "Red Hat Enterprise Linux 10", "platforms": [], "versions": [ { "version": "7:5.8.2-9.el10_2", "status": "unaffected", "lessThan": "*", "versionType": "rpm" } ], "defaultStatus": "affected", "cpes": [ "cpe:/o:redhat:enterprise_linux:10.2" ], "source": "redhat", "url": "https://www.cve.org/CVERecord?id=CVE-2026-19730" }, { "vendor": "Red Hat", "name": "Red Hat Enterprise Linux 9", "platforms": [], "versions": [ { "version": "6:5.8.2-7.el9_8", "status": "unaffected", "lessThan": "*", "versionType": "rpm" } ], "defaultStatus": "affected", "cpes": [ "cpe:/a:redhat:enterprise_linux:9::appstream" ], "source": "redhat", "url": "https://www.cve.org/CVERecord?id=CVE-2026-19730" }, { "vendor": "Red Hat", "name": "Red Hat Ansible Automation Platform 2", "platforms": [], "versions": [], "defaultStatus": "unaffected", "cpes": [ "cpe:/a:redhat:ansible_automation_platform:2" ], "source": "redhat", "url": "https://www.cve.org/CVERecord?id=CVE-2026-19730" }, { "vendor": "Red Hat", "name": "Red Hat Ansible Automation Platform 2", "platforms": [], "versions": [], "defaultStatus": "unaffected", "cpes": [ "cpe:/a:redhat:ansible_automation_platform:2" ], "source": "redhat", "url": "https://www.cve.org/CVERecord?id=CVE-2026-19730" }, { "vendor": "Red Hat", "name": "Red Hat Ansible Automation Platform 2", "platforms": [], "versions": [], "defaultStatus": "unaffected", "cpes": [ "cpe:/a:redhat:ansible_automation_platform:2" ], "source": "redhat", "url": "https://www.cve.org/CVERecord?id=CVE-2026-19730" }, { "vendor": "Red Hat", "name": "Red Hat Ansible Automation Platform 2", "platforms": [], "versions": [], "defaultStatus": "unaffected", "cpes": [ "cpe:/a:redhat:ansible_automation_platform:2" ], "source": "redhat", "url": "https://www.cve.org/CVERecord?id=CVE-2026-19730" }, { "vendor": "Red Hat", "name": "Red Hat Enterprise Linux 8", "platforms": [], "versions": [], "defaultStatus": "unaffected", "cpes": [ "cpe:/a:redhat:enterprise_linux:8" ], "source": "redhat", "url": "https://www.cve.org/CVERecord?id=CVE-2026-19730" }, { "vendor": "Red Hat", "name": "Red Hat Hardened Images", "platforms": [], "versions": [], "defaultStatus": "unaffected", "cpes": [ "cpe:/a:redhat:hummingbird:1" ], "source": "redhat", "url": "https://www.cve.org/CVERecord?id=CVE-2026-19730" }, { "vendor": "Red Hat", "name": "Red Hat OpenShift Container Platform 4", "platforms": [], "versions": [], "defaultStatus": "unaffected", "cpes": [ "cpe:/a:redhat:openshift:4" ], "source": "redhat", "url": "https://www.cve.org/CVERecord?id=CVE-2026-19730" }, { "vendor": "Red Hat", "name": "Red Hat OpenShift Container Platform 5", "platforms": [], "versions": [], "defaultStatus": "unaffected", "cpes": [ "cpe:/a:redhat:openshift:5" ], "source": "redhat", "url": "https://www.cve.org/CVERecord?id=CVE-2026-19730" }, { "vendor": "Red Hat", "name": "Red Hat OpenShift Dev Spaces", "platforms": [], "versions": [], "defaultStatus": "unaffected", "cpes": [ "cpe:/a:redhat:openshift_devspaces:3" ], "source": "redhat", "url": "https://www.cve.org/CVERecord?id=CVE-2026-19730" }, { "vendor": "Red Hat", "name": "Red Hat OpenShift Dev Spaces", "platforms": [], "versions": [], "defaultStatus": "unaffected", "cpes": [ "cpe:/a:redhat:openshift_devspaces:3" ], "source": "redhat", "url": "https://www.cve.org/CVERecord?id=CVE-2026-19730" }, { "vendor": "Red Hat", "name": "Red Hat OpenShift Dev Spaces", "platforms": [], "versions": [], "defaultStatus": "unaffected", "cpes": [ "cpe:/a:redhat:openshift_devspaces:3" ], "source": "redhat", "url": "https://www.cve.org/CVERecord?id=CVE-2026-19730" }, { "vendor": "Red Hat", "name": "Red Hat OpenShift Virtualization 4", "platforms": [], "versions": [], "defaultStatus": "unaffected", "cpes": [ "cpe:/a:redhat:container_native_virtualization:4" ], "source": "redhat", "url": "https://www.cve.org/CVERecord?id=CVE-2026-19730" }, { "vendor": "Red Hat", "name": "Red Hat Quay 3", "platforms": [], "versions": [], "defaultStatus": "unaffected", "cpes": [ "cpe:/a:redhat:quay:3" ], "source": "redhat", "url": "https://www.cve.org/CVERecord?id=CVE-2026-19730" }, { "vendor": "Red Hat", "name": "Red Hat Quay 3", "platforms": [], "versions": [], "defaultStatus": "unaffected", "cpes": [ "cpe:/a:redhat:quay:3" ], "source": "redhat", "url": "https://www.cve.org/CVERecord?id=CVE-2026-19730" } ]
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