CVE-2026-103242

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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."}], "affected": [{"vendor": "Red Hat", "product": "Red Hat Enterprise Linux 10", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "packageName": "rpm", "defaultStatus": "affected", "cpes": ["cpe:/a:redhat:enterprise_linux:10"]}, {"vendor": "Red Hat", "product": "Red Hat Enterprise Linux 6", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "packageName": "rpm", "defaultStatus": "unaffected", "cpes": ["cpe:/o:redhat:rhel_els:6"]}, {"vendor": "Red Hat", "product": "Red Hat Enterprise Linux 7", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "packageName": "rpm", "defaultStatus": "unaffected", "cpes": ["cpe:/o:redhat:rhel_els:7"]}, {"vendor": "Red Hat", "product": "Red Hat Enterprise Linux 8", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "packageName": "rpm", "defaultStatus": 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(RHOAI)", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "packageName": "rhoai/odh-ogx-k8s-operator-rhel9", "defaultStatus": "unaffected", "cpes": ["cpe:/a:redhat:openshift_ai"]}, {"vendor": "Red Hat", "product": "Red Hat OpenShift AI (RHOAI)", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "packageName": "rhoai/odh-ogx-module-operator-rhel9", "defaultStatus": "unaffected", "cpes": ["cpe:/a:redhat:openshift_ai"]}, {"vendor": "Red Hat", "product": "Red Hat OpenShift AI (RHOAI)", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "packageName": "rhoai/odh-training-operator-rhel9", "defaultStatus": "unaffected", "cpes": ["cpe:/a:redhat:openshift_ai"]}, {"vendor": "Red Hat", "product": "Red Hat OpenShift AI (RHOAI)", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "packageName": "rhoai/odh-trustyai-service-operator-rhel9", "defaultStatus": "unaffected", "cpes": ["cpe:/a:redhat:openshift_ai"]}, {"vendor": "Red Hat", "product": "Red Hat OpenShift AI (RHOAI)", "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "packageName": "rhoai/odh-workbenches-operator-rhel9", "defaultStatus": "unaffected", "cpes": ["cpe:/a:redhat:openshift_ai"]}], "references": [{"url": "https://access.redhat.com/security/cve/CVE-2026-103242", "tags": ["vdb-entry", "x_refsource_REDHAT"]}, {"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2543866", "name": "RHBZ#2543866", "tags": ["issue-tracking", "x_refsource_REDHAT"]}], "datePublic": "2026-09-30T11:00:35.965Z", "problemTypes": [{"descriptions": [{"cweId": "CWE-122", "description": "Heap-based Buffer Overflow", "lang": "en", "type": "CWE"}]}], "x_redhatCweChain": "CWE-122: Heap-based Buffer Overflow", "workarounds": [{"lang": "en", "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."}], "timeline": [{"lang": "en", "time": "2026-09-18T09:42:14.000Z", "value": "Reported to Red Hat."}, {"lang": "en", "time": "2026-09-30T11:00:35.965Z", "value": "Made public."}], "credits": [{"lang": "en", "value": "Red Hat would like to thank Calif.io for reporting this issue."}], "providerMetadata": {"orgId": "53f830b8-0a3f-465b-8143-3b8a9948e749", "shortName": "redhat", "dateUpdated": "2026-11-06T07:39:50.256Z"}, "x_generator": {"engine": "cvelib 1.8.0"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-09-30T16:36:10.336744Z", "id": "CVE-2026-103242", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-09-30T16:37:10.970Z"}}]}}

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{"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"}

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