CVE-2026-103242 - Vulnerability Details - OpenCVE

A heap-based buffer overflow flaw was found in rpm. RPMTAG_FILESIGNATURES in a crafted, unsigned RPM package's main header is declared with the wrong header type, causing hex2binv() to allocate a one-byte buffer and then write the tag's attacker-controlled, hex-decoded content — of attacker-chosen length — 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 0.00134.

Exploitation none

Automatable no

Technical Impact total

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
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

Avoid processing or extracting RPM packages from untrusted or unsigned sources. Do not run rpm -qlvp, rpm2cpio, or rpm2archive against 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-2026-103242
https://bugzilla.redhat.com/show_bug.cgi?id=2543866
https://nvd.nist.gov/vuln/detail/CVE-2026-103242
https://www.cve.org/CVERecord?id=CVE-2026-103242

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

Thu, 05 Nov 2026 17:30:00 +0000

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

Thu, 05 Nov 2026 16:00:00 +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

Thu, 01 Oct 2026 00:15:00 +0000

Type	Values Removed	Values Added
References		https://nvd.nist.gov/vuln/detail/CVE-2026-103242 https://www.cve.org/CVERecord?id=CVE-2026-103242
Metrics	threat_severity `None`	threat_severity `Moderate`

Wed, 30 Sep 2026 12:00:00 +0000

Type	Values Removed	Values Added
Description		A heap-based buffer overflow flaw was found in rpm. RPMTAG_FILESIGNATURES in a crafted, unsigned RPM package's main header is declared with the wrong header type, causing hex2binv() to allocate a one-byte buffer and then write the tag's attacker-controlled, hex-decoded content — of attacker-chosen length — past the end of that allocation. This is reachable via rpm2cpio, rpm2archive, and rpm -qlvp on an untrusted package.
Title		Rpm: heap-based buffer overflow write in hex2binv() via a mistyped rpmtag_filesignatures header tag
First Time appeared		Redhat Redhat enterprise Linux Redhat hummingbird
Weaknesses		CWE-122
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-2026-103242 https://bugzilla.redhat.com/show_bug.cgi?id=2543866
Metrics		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'}`

Projects

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MITRE

Status: PUBLISHED

Assigner: redhat

Published: 2026-09-30T11:50:32.039Z

Updated: 2026-11-13T13:33:52.458Z

Reserved: 2026-09-30T10:39:52.447Z

Link: CVE-2026-103242

Vulnrichment

Updated: 2026-09-30T16:37:02.687Z

NVD

Status : Awaiting Analysis

Published: 2026-09-30T12:17:12.653

Modified: 2026-11-13T14:17:47.020

Link: CVE-2026-103242

Redhat

Severity : Moderate

Publid Date: 2026-09-30T11:00:35Z

Links: CVE-2026-103242 - Bugzilla

OpenCVE Enrichment

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

Weaknesses

CWE-122

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RPMTAG_FILESIGNATURES in a crafted, unsigned RPM package's main header is declared with the wrong header type, causing hex2binv() to allocate a one-byte buffer and then write the tag's attacker-controlled, hex-decoded content \u2014 of attacker-chosen length \u2014 past the end of that allocation. This is reachable via rpm2cpio, rpm2archive, and rpm -qlvp on an untrusted package."}], "id": "CVE-2026-103242", "lastModified": "2026-11-13T14:17:47.020", "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-2026-103242", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-09-30T16:36:10.336744Z", "version": "2.0.3"}}]}, "published": "2026-09-30T12:17:12.653", "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-2026-103242"}, {"source": "secalert@redhat.com", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2543866"}], "sourceIdentifier": "secalert@redhat.com", "vulnStatus": "Awaiting Analysis", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-122"}], "source": "secalert@redhat.com", "type": "Secondary"}]}

{"acknowledgement": "Red Hat would like to thank Calif.io for reporting this issue.", "bugzilla": {"description": "rpm: Heap-based buffer overflow write in hex2binv() via a mistyped RPMTAG_FILESIGNATURES header tag", "id": "2543866", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2543866"}, "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-122", "details": ["A heap-based buffer overflow flaw was found in rpm. RPMTAG_FILESIGNATURES in a crafted, unsigned RPM package's main header is declared with the wrong header type, causing hex2binv() to allocate a one-byte buffer and then write the tag's attacker-controlled, hex-decoded content \u2014 of attacker-chosen length \u2014 past the end of that allocation. This is reachable via rpm2cpio, rpm2archive, and rpm -qlvp on an untrusted package."], "mitigation": {"lang": "en:us", "value": "Avoid processing or extracting RPM packages from untrusted or unsigned sources. Do not run rpm -qlvp, rpm2cpio, or rpm2archive against RPM files whose origin and integrity cannot be verified."}, "name": "CVE-2026-103242", "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": "2026-09-30T11:00:35Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-103242\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-103242"], "statement": "This issue is rated Moderate because, while parsing a crafted RPM triggers an attacker-controlled-content, attacker-controlled-length heap write, exploitation is local: a user or automated workflow must choose to run rpm -qlvp, rpm2cpio, or rpm2archive against the untrusted package. The flaw is not exposed as a network service. Testing against the shipped rpm binary demonstrated a reliable crash; no proof-of-concept achieving code execution beyond the crash has been produced.", "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": 90.0, "confidence_source": "inferred", "scores": [{"score": 90.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "product": "rpm", "vendor": "rpm"}], "created": "2026-09-30T13:30:17.746974+00:00", "updated": "2026-11-10T22:45:02.554536+00:00", "vendors": ["red_hat", "red_hat$PRODUCT$enterprise_linux", "redhat", "redhat$PRODUCT$enterprise_linux", "redhat$PRODUCT$hardened_images", "rpm", "rpm$PRODUCT$rpm"]}