{ "document": { "aggregate_severity": { "namespace": "https://access.redhat.com/security/updates/classification/", "text": "Important" }, "category": "csaf_security_advisory", "csaf_version": "2.0", "distribution": { "text": "Copyright © Red Hat, Inc. All rights reserved.", "tlp": { "label": "WHITE", "url": "https://www.first.org/tlp/" } }, "lang": "en", "notes": [ { "category": "summary", "text": "An update for freerdp is now available for Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions.\n\nRed Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.", "title": "Topic" }, { "category": "general", "text": "FreeRDP is a free implementation of the Remote Desktop Protocol (RDP), released under the Apache license. The xfreerdp client can connect to RDP servers such as Microsoft Windows machines, xrdp, and VirtualBox.\n\nSecurity Fix(es):\n\n* freerdp: FreeRDP: Arbitrary code execution via heap out-of-bounds write in RLE planar decode path (CVE-2026-26965)\n\n* freerdp: FreeRDP: Arbitrary code execution via heap buffer overflow in GDI surface pipeline (CVE-2026-26955)\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.", "title": "Details" }, { "category": "legal_disclaimer", "text": "This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.", "title": "Terms of Use" } ], "publisher": { "category": "vendor", "contact_details": "https://access.redhat.com/security/team/contact/", "issuing_authority": "Red Hat Product Security is responsible for vulnerability handling across all Red Hat products and services.", "name": "Red Hat Product Security", "namespace": "https://www.redhat.com" }, "references": [ { "category": "self", "summary": "https://access.redhat.com/errata/RHSA-2026:6395", "url": "https://access.redhat.com/errata/RHSA-2026:6395" }, { "category": "external", "summary": "https://access.redhat.com/security/updates/classification/#important", "url": "https://access.redhat.com/security/updates/classification/#important" }, { "category": "external", "summary": "2442959", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2442959" }, { "category": "external", "summary": "2443132", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2443132" }, { "category": "self", "summary": "Canonical URL", "url": "https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_6395.json" } ], "title": "Red Hat Security Advisory: freerdp security update", "tracking": { "current_release_date": "2026-05-19T15:36:58+00:00", "generator": { "date": "2026-05-19T15:36:58+00:00", "engine": { "name": "Red Hat SDEngine", "version": "4.8.0" } }, "id": "RHSA-2026:6395", "initial_release_date": "2026-04-01T16:24:09+00:00", "revision_history": [ { "date": "2026-04-01T16:24:09+00:00", "number": "1", "summary": "Initial version" }, { "date": "2026-04-01T16:24:09+00:00", "number": "2", "summary": "Last updated version" }, { "date": "2026-05-19T15:36:58+00:00", "number": "3", "summary": "Last generated version" } ], "status": "final", "version": "3" } }, "product_tree": { "branches": [ { "branches": [ { "branches": [ { "category": "product_name", "name": "Red Hat Enterprise Linux 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"vulnerabilities": [ { "cve": "CVE-2026-26955", "cwe": { "id": "CWE-805", "name": "Buffer Access with Incorrect Length Value" }, "discovery_date": "2026-02-26T21:03:46.682470+00:00", "ids": [ { "system_name": "Red Hat Bugzilla ID", "text": "2443132" } ], "notes": [ { "category": "description", "text": "A flaw was found in FreeRDP, a free implementation of the Remote Desktop Protocol (RDP). A malicious RDP server can exploit a heap buffer overflow vulnerability by sending a specially crafted graphics command to a FreeRDP client. This allows the server to write data outside of its intended memory region, potentially leading to arbitrary code execution on the client system. The vulnerability occurs because the client does not properly validate the dimensions of incoming graphics commands.", "title": "Vulnerability description" }, { "category": "summary", "text": "freerdp: FreeRDP: Arbitrary code execution via heap buffer overflow in GDI surface pipeline", "title": "Vulnerability summary" }, { "category": "other", "text": "A malicous RDP server may lead a heap buffer overflow in FreeRDP when the client is using the GDI surface pipeline. This happens when the server send a maliciously crafted RDPGFX ClearCodec command. When interpreting the command FreeRDP fails to validate the whether rectangle described by it falls within the destination surface dimension allowing the attacker to overwrite the surface data buffer without any boundaries check. Depending on the memory layout of the freerdp client's process it's possible to corrupt adjacent points leading to a remote code execution or force the freerdp client to crash.", "title": "Statement" }, { "category": "general", "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.", "title": "CVSS score applicability" } ], "product_status": { "fixed": [ "AppStream-9.0.0.Z.E4S:freerdp-2:2.4.1-3.el9_0.2.aarch64", "AppStream-9.0.0.Z.E4S:freerdp-2:2.4.1-3.el9_0.2.ppc64le", "AppStream-9.0.0.Z.E4S:freerdp-2:2.4.1-3.el9_0.2.s390x", "AppStream-9.0.0.Z.E4S:freerdp-2:2.4.1-3.el9_0.2.src", "AppStream-9.0.0.Z.E4S:freerdp-2:2.4.1-3.el9_0.2.x86_64", "AppStream-9.0.0.Z.E4S:freerdp-debuginfo-2:2.4.1-3.el9_0.2.aarch64", "AppStream-9.0.0.Z.E4S:freerdp-debuginfo-2:2.4.1-3.el9_0.2.i686", "AppStream-9.0.0.Z.E4S:freerdp-debuginfo-2:2.4.1-3.el9_0.2.ppc64le", 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"category": "external", "summary": "RHBZ#2443132", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2443132" }, { "category": "external", "summary": "https://www.cve.org/CVERecord?id=CVE-2026-26955", "url": "https://www.cve.org/CVERecord?id=CVE-2026-26955" }, { "category": "external", "summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-26955", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-26955" }, { "category": "external", "summary": "https://github.com/FreeRDP/FreeRDP/commit/7d8fdce2d0ef337cb86cb37fc0c436c905e04d77", "url": "https://github.com/FreeRDP/FreeRDP/commit/7d8fdce2d0ef337cb86cb37fc0c436c905e04d77" }, { "category": "external", "summary": "https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-mr6w-ch7c-mqqj", "url": "https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-mr6w-ch7c-mqqj" } ], "release_date": "2026-02-25T20:47:14.660000+00:00", "remediations": [ { "category": "vendor_fix", "date": "2026-04-01T16:24:09+00:00", "details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258", "product_ids": [ "AppStream-9.0.0.Z.E4S:freerdp-2:2.4.1-3.el9_0.2.aarch64", "AppStream-9.0.0.Z.E4S:freerdp-2:2.4.1-3.el9_0.2.ppc64le", "AppStream-9.0.0.Z.E4S:freerdp-2:2.4.1-3.el9_0.2.s390x", "AppStream-9.0.0.Z.E4S:freerdp-2:2.4.1-3.el9_0.2.src", "AppStream-9.0.0.Z.E4S:freerdp-2:2.4.1-3.el9_0.2.x86_64", "AppStream-9.0.0.Z.E4S:freerdp-debuginfo-2:2.4.1-3.el9_0.2.aarch64", "AppStream-9.0.0.Z.E4S:freerdp-debuginfo-2:2.4.1-3.el9_0.2.i686", "AppStream-9.0.0.Z.E4S:freerdp-debuginfo-2:2.4.1-3.el9_0.2.ppc64le", "AppStream-9.0.0.Z.E4S:freerdp-debuginfo-2:2.4.1-3.el9_0.2.s390x", "AppStream-9.0.0.Z.E4S:freerdp-debuginfo-2:2.4.1-3.el9_0.2.x86_64", "AppStream-9.0.0.Z.E4S:freerdp-debugsource-2:2.4.1-3.el9_0.2.aarch64", "AppStream-9.0.0.Z.E4S:freerdp-debugsource-2:2.4.1-3.el9_0.2.i686", "AppStream-9.0.0.Z.E4S:freerdp-debugsource-2:2.4.1-3.el9_0.2.ppc64le", 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A malicious RDP server can exploit a heap out-of-bounds write vulnerability in the `planar_decompress_plane_rle()` function. This vulnerability allows the server to write past the end of a temporary buffer, potentially overwriting critical data such as function pointers. This can lead to arbitrary code execution on the connecting FreeRDP client.", "title": "Vulnerability description" }, { "category": "summary", "text": "freerdp: FreeRDP: Arbitrary code execution via heap out-of-bounds write in RLE planar decode path", "title": "Vulnerability summary" }, { "category": "general", "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.", "title": "CVSS score applicability" } ], "product_status": { "fixed": [ "AppStream-9.0.0.Z.E4S:freerdp-2:2.4.1-3.el9_0.2.aarch64", "AppStream-9.0.0.Z.E4S:freerdp-2:2.4.1-3.el9_0.2.ppc64le", "AppStream-9.0.0.Z.E4S:freerdp-2:2.4.1-3.el9_0.2.s390x", "AppStream-9.0.0.Z.E4S:freerdp-2:2.4.1-3.el9_0.2.src", "AppStream-9.0.0.Z.E4S:freerdp-2:2.4.1-3.el9_0.2.x86_64", "AppStream-9.0.0.Z.E4S:freerdp-debuginfo-2:2.4.1-3.el9_0.2.aarch64", 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] }, "references": [ { "category": "self", "summary": "Canonical URL", "url": "https://access.redhat.com/security/cve/CVE-2026-26965" }, { "category": "external", "summary": "RHBZ#2442959", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2442959" }, { "category": "external", "summary": "https://www.cve.org/CVERecord?id=CVE-2026-26965", "url": "https://www.cve.org/CVERecord?id=CVE-2026-26965" }, { "category": "external", "summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-26965", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-26965" }, { "category": "external", "summary": "https://github.com/FreeRDP/FreeRDP/commit/a0be5cb87d760bb1c803ad1bb835aa1e73e62abc", "url": "https://github.com/FreeRDP/FreeRDP/commit/a0be5cb87d760bb1c803ad1bb835aa1e73e62abc" }, { "category": "external", "summary": "https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-5vgf-mw4f-r33h", "url": "https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-5vgf-mw4f-r33h" } ], "release_date": "2026-02-25T20:59:17.828000+00:00", "remediations": [ { "category": "vendor_fix", "date": "2026-04-01T16:24:09+00:00", "details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258", "product_ids": [ "AppStream-9.0.0.Z.E4S:freerdp-2:2.4.1-3.el9_0.2.aarch64", "AppStream-9.0.0.Z.E4S:freerdp-2:2.4.1-3.el9_0.2.ppc64le", "AppStream-9.0.0.Z.E4S:freerdp-2:2.4.1-3.el9_0.2.s390x", "AppStream-9.0.0.Z.E4S:freerdp-2:2.4.1-3.el9_0.2.src", "AppStream-9.0.0.Z.E4S:freerdp-2:2.4.1-3.el9_0.2.x86_64", "AppStream-9.0.0.Z.E4S:freerdp-debuginfo-2:2.4.1-3.el9_0.2.aarch64", "AppStream-9.0.0.Z.E4S:freerdp-debuginfo-2:2.4.1-3.el9_0.2.i686", "AppStream-9.0.0.Z.E4S:freerdp-debuginfo-2:2.4.1-3.el9_0.2.ppc64le", "AppStream-9.0.0.Z.E4S:freerdp-debuginfo-2:2.4.1-3.el9_0.2.s390x", "AppStream-9.0.0.Z.E4S:freerdp-debuginfo-2:2.4.1-3.el9_0.2.x86_64", "AppStream-9.0.0.Z.E4S:freerdp-debugsource-2:2.4.1-3.el9_0.2.aarch64", 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