CVE-2026-95520 - Vulnerability Details - OpenCVE

A heap-based buffer overflow flaw was found in rpm. Parsing a symlink entry in an untrusted RPM package whose declared RPMTAG_LONGFILESIZES value is 0xFFFFFFFFFFFFFFFF causes an integer overflow in iterReadArchiveNext() that shrinks a buffer allocation to one byte, after which the payload's independently-controlled cpio filesize field is used to write attacker-controlled data past the end of that allocation. This is reachable via rpm2cpio, rpm2archive, and rpm -qlvp on an untrusted package.

No CVSS v4.0

Attack Vector Local

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact None

Integrity Impact High

Availability Impact High

User Interaction Required

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00156.

Exploitation none

Automatable no

Technical Impact partial

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

Red Hat

Red Hat Hardened Images

affected

Version	Status	Constraints
`6.1.0-1.4.hum1`	unaffected	< *

Red Hat Red Hat Enterprise Linux 10 affected —

Red Hat Red Hat Enterprise Linux 6 unaffected —

Red Hat Red Hat Enterprise Linux 7 unaffected —

Red Hat Red Hat Enterprise Linux 8 affected —

Red Hat Red Hat Enterprise Linux 9 affected —

Red Hat Red Hat OpenShift AI (RHOAI) unaffected —

Red Hat Red Hat OpenShift AI (RHOAI) unknown —

Red Hat Red Hat OpenShift AI (RHOAI) unaffected —

Red Hat Red Hat OpenShift AI (RHOAI) unknown —

Red Hat Red Hat OpenShift AI (RHOAI) unaffected —

Red Hat Red Hat OpenShift AI (RHOAI) unknown —

Red Hat Red Hat OpenShift AI (RHOAI) unaffected —

Red Hat Red Hat OpenShift AI (RHOAI) unaffected —

Red Hat Red Hat OpenShift AI (RHOAI) unaffected —

Red Hat Red Hat OpenShift AI (RHOAI) unaffected —

Red Hat Red Hat OpenShift AI (RHOAI) unaffected —

Red Hat Red Hat OpenShift AI (RHOAI) unaffected —

Red Hat Red Hat OpenShift AI (RHOAI) unaffected —

Red Hat Red Hat OpenShift AI (RHOAI) unaffected —

Red Hat Red Hat OpenShift AI (RHOAI) unaffected —

Red Hat Red Hat OpenShift AI (RHOAI) unknown —

Red Hat Red Hat OpenShift AI (RHOAI) unknown —

Red Hat Red Hat OpenShift AI (RHOAI) unknown —

Red Hat Red Hat OpenShift AI (RHOAI) unknown —

Red Hat Red Hat OpenShift AI (RHOAI) unknown —

Red Hat Red Hat OpenShift AI (RHOAI) unknown —

Red Hat Red Hat OpenShift AI (RHOAI) unknown —

Red Hat Red Hat OpenShift AI (RHOAI) unknown —

Red Hat Red Hat OpenShift AI (RHOAI) unaffected —

Red Hat Red Hat OpenShift AI (RHOAI) unaffected —

Red Hat Red Hat OpenShift AI (RHOAI) unaffected —

Red Hat Red Hat OpenShift AI (RHOAI) unknown —

Red Hat Red Hat OpenShift AI (RHOAI) unaffected —

Red Hat Red Hat OpenShift AI (RHOAI) unaffected —

Red Hat Red Hat OpenShift AI (RHOAI) unaffected —

Red Hat Red Hat OpenShift AI (RHOAI) unaffected —

Red Hat Red Hat OpenShift AI (RHOAI) unaffected —

No data.

No data.

OpenCVE Enrichment is a feature of OpenCVE that uses AI to automatically link vendors and products to CVEs. Learn more on GitHub.

Vendors	Products
Red Hat Subscribe	Enterprise Linux Subscribe
Redhat Subscribe	Enterprise Linux Subscribe Hardened Images Subscribe Hummingbird Subscribe
Rpm Subscribe	Rpm Subscribe

Project Subscriptions

Vendors	Products
Red Hat Subscribe	Enterprise Linux Subscribe
Redhat Subscribe	Enterprise Linux Subscribe Hardened Images Subscribe Hummingbird Subscribe Openshift Ai Subscribe Rhel Els Subscribe
Rpm Subscribe	Rpm Subscribe

Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

To reduce exposure, avoid processing or extracting RPM packages from untrusted sources. Do not use `rpm2cpio`, `rpm2archive`, or `rpm -qlvp` on RPM files whose origin and integrity cannot be verified.

References

Link	Providers
https://access.redhat.com/errata/RHSA-2026:98095
https://access.redhat.com/security/cve/CVE-2026-95520
https://bugzilla.redhat.com/show_bug.cgi?id=2537809
https://nvd.nist.gov/vuln/detail/CVE-2026-95520
https://www.cve.org/CVERecord?id=CVE-2026-95520

History

Fri, 13 Nov 2026 13:45:00 +0000

Type	Values Removed	Values Added
References		https://access.redhat.com/errata/RHSA-2026:98095

Tue, 10 Nov 2026 23:00:00 +0000

Type	Values Removed	Values Added
First Time appeared		Red Hat Red Hat enterprise Linux Redhat hardened Images Rpm Rpm rpm
Vendors & Products		Red Hat Red Hat enterprise Linux Redhat hardened Images Rpm Rpm rpm

Fri, 06 Nov 2026 07:45:00 +0000

Type	Values Removed	Values Added
First Time appeared		Redhat openshift Ai
CPEs		cpe:/a:redhat:openshift_ai
Vendors & Products		Redhat openshift Ai

Fri, 06 Nov 2026 02:30:00 +0000

Type	Values Removed	Values Added
First Time appeared		Redhat rhel Els
CPEs	cpe:/o:redhat:enterprise_linux:10 cpe:/o:redhat:enterprise_linux:6 cpe:/o:redhat:enterprise_linux:7 cpe:/o:redhat:enterprise_linux:8 cpe:/o:redhat:enterprise_linux:9	cpe:/a:redhat:enterprise_linux:10 cpe:/a:redhat:enterprise_linux:8 cpe:/a:redhat:enterprise_linux:9 cpe:/o:redhat:rhel_els:6 cpe:/o:redhat:rhel_els:7
Vendors & Products		Redhat rhel Els

Tue, 29 Sep 2026 14:30:00 +0000

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

Tue, 29 Sep 2026 13:15:00 +0000

Type	Values Removed	Values Added
Description		A heap-based buffer overflow flaw was found in rpm. Parsing a symlink entry in an untrusted RPM package whose declared RPMTAG_LONGFILESIZES value is 0xFFFFFFFFFFFFFFFF causes an integer overflow in iterReadArchiveNext() that shrinks a buffer allocation to one byte, after which the payload's independently-controlled cpio filesize field is used to write attacker-controlled data past the end of that allocation. This is reachable via rpm2cpio, rpm2archive, and rpm -qlvp on an untrusted package.
Title		Rpm: rpm: integer overflow in iterreadarchivenext() leads to heap-based buffer overflow when parsing untrusted rpm packages
First Time appeared		Redhat Redhat enterprise Linux Redhat hummingbird
Weaknesses		CWE-787
CPEs		cpe:/a:redhat:hummingbird:1 cpe:/o:redhat:enterprise_linux:10 cpe:/o:redhat:enterprise_linux:6 cpe:/o:redhat:enterprise_linux:7 cpe:/o:redhat:enterprise_linux:8 cpe:/o:redhat:enterprise_linux:9
Vendors & Products		Redhat Redhat enterprise Linux Redhat hummingbird
References		https://access.redhat.com/security/cve/CVE-2026-95520 https://bugzilla.redhat.com/show_bug.cgi?id=2537809 https://nvd.nist.gov/vuln/detail/CVE-2026-95520 https://www.cve.org/CVERecord?id=CVE-2026-95520
Metrics	threat_severity `None`	cvssV3_1 `{'score': 7.1, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H'}` threat_severity `Moderate`

Projects

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MITRE

Status: PUBLISHED

Assigner: redhat

Published: 2026-09-29T11:02:06.457Z

Updated: 2026-11-13T13:33:52.132Z

Reserved: 2026-09-22T08:44:44.967Z

Link: CVE-2026-95520

Vulnrichment

Updated: 2026-09-29T13:17:50.012Z

NVD

Status : Awaiting Analysis

Published: 2026-09-29T12:17:12.650

Modified: 2026-11-13T14:18:24.717

Link: CVE-2026-95520

Redhat

Severity : Moderate

Publid Date: 2026-09-29T10:54:13Z

Links: CVE-2026-95520 - Bugzilla

OpenCVE Enrichment

Updated: 2026-11-10T22:45:02Z

Weaknesses

CWE-787

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Parsing a symlink entry in an untrusted RPM package whose declared RPMTAG_LONGFILESIZES value is 0xFFFFFFFFFFFFFFFF causes an integer overflow in iterReadArchiveNext() that shrinks a buffer allocation to one byte, after which the payload's independently-controlled cpio filesize field is used to write attacker-controlled data past the end of that allocation. This is reachable via rpm2cpio, rpm2archive, and rpm -qlvp on an untrusted package."}], "id": "CVE-2026-95520", "lastModified": "2026-11-13T14:18:24.717", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.1, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.2, "source": "secalert@redhat.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-95520", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-09-29T13:17:45.627559Z", "version": "2.0.3"}}]}, "published": "2026-09-29T12:17:12.650", "references": [{"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2026:98095"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/security/cve/CVE-2026-95520"}, {"source": "secalert@redhat.com", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2537809"}], "sourceIdentifier": "secalert@redhat.com", "vulnStatus": "Awaiting Analysis", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-787"}], "source": "secalert@redhat.com", "type": "Secondary"}]}

{"acknowledgement": "Red Hat would like to thank tao pan for reporting this issue.", "bugzilla": {"description": "rpm: rpm: integer overflow in iterReadArchiveNext() leads to heap-based buffer overflow when parsing untrusted RPM packages", "id": "2537809", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2537809"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.1", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H", "status": "draft"}, "cwe": "CWE-787", "details": ["A heap-based buffer overflow flaw was found in rpm. Parsing a symlink entry in an untrusted RPM package whose declared RPMTAG_LONGFILESIZES value is 0xFFFFFFFFFFFFFFFF causes an integer overflow in iterReadArchiveNext() that shrinks a buffer allocation to one byte, after which the payload's independently-controlled cpio filesize field is used to write attacker-controlled data past the end of that allocation. This is reachable via rpm2cpio, rpm2archive, and rpm -qlvp on an untrusted package."], "mitigation": {"lang": "en:us", "value": "To reduce exposure, avoid processing or extracting RPM packages from untrusted sources. Do not use `rpm2cpio`, `rpm2archive`, or `rpm -qlvp` on RPM files whose origin and integrity cannot be verified."}, "name": "CVE-2026-95520", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Affected", "package_name": "rpm", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "rpm", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "rpm", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "rpm", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "rpm", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/a:redhat:hummingbird:1", "fix_state": "Affected", "package_name": "rpm", "product_name": "Red Hat Hardened Images"}], "public_date": "2026-09-29T10:54:13Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-95520\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-95520"], "statement": "This issue is rated Moderate because, while parsing a crafted RPM triggers an attacker-controlled-length heap write, exploitation is local: a user or automated workflow must choose to run rpm2cpio, rpm2archive, rpm -qlvp, or an install/rebuild against the untrusted package. The flaw is not exposed as a network service, consistent with other Moderate-rated integer-overflow/heap-overflow flaws already tracked against the same iterReadArchiveNext() symlink-handling code path.", "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": null}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "Red Hat Enterprise Linux 10", "source": "cna", "vendor": "Red Hat"}, "product": "enterprise_linux", "vendor": "red_hat"}, {"configurations": [{"platform": null, "status": "unaffected", "versions": null}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "Red Hat Enterprise Linux 6", "source": "cna", "vendor": "Red Hat"}, "product": "enterprise_linux", "vendor": "red_hat"}, {"configurations": [{"platform": null, "status": "affected", "versions": null}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "Red Hat Enterprise Linux 10", "source": "cna", "vendor": "Red Hat"}, "product": "enterprise_linux", "vendor": "redhat"}, {"configurations": [{"platform": null, "status": "unaffected", "versions": null}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "Red Hat Enterprise Linux 6", "source": "cna", "vendor": "Red Hat"}, "product": "enterprise_linux", "vendor": "redhat"}, {"configurations": [{"platform": null, "status": "affected", "versions": null}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "Red Hat Hardened Images", "source": "cna", "vendor": "Red Hat"}, "product": "hardened_images", "vendor": "redhat"}, {"configurations": [{"platform": null, "status": "affected", "versions": null}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "product": "hummingbird", "vendor": "redhat"}, {"configurations": [{"platform": null, "status": "affected", "versions": null}], "enrichment": {"confidence": 90.0, "confidence_source": "inferred", "scores": [{"score": 90.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "product": "rpm", "vendor": "rpm"}], "created": "2026-09-29T16:15:14.679993+00:00", "updated": "2026-11-10T22:45:02.558476+00:00", "vendors": ["red_hat", "red_hat$PRODUCT$enterprise_linux", "redhat", "redhat$PRODUCT$enterprise_linux", "redhat$PRODUCT$hardened_images", "redhat$PRODUCT$hummingbird", "rpm", "rpm$PRODUCT$rpm"]}