Red Hat Linux Security Advisories & CVEs
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Security advisories for your Red Hat release
Pick your distribution release to see every advisory issued for it and its severity mix. Fixes ship as errata, so keep the system patched. This is the release's advisory history, not a per-package scan.
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Red Hat Enterprise Linux errata (RHSA) via the official Red Hat Security Data API — CVE severity, CVSS and affected packages. A credential-free official source.
Latest Red Hat advisories
Medium [CVE-2026-67295] Unauthorized File Access via Drive Redirection Vulnerability
FreeRDP before 3.29.0 fails to properly validate server-supplied RDPDR paths in drive redirection, allowing attackers to access prefix-sibling paths outside the configured shared root. A malicious RDP server can read, write, delete, and enumerate files in sibling directories by sending non-rooted paths that bypass the shared-root boundary check. A flaw was found in FreeRDP, an open-source implementation of the Remote Desktop Protocol (RDP). This vulnerability allows a malicious RDP server to bypass security checks during drive redirection. By sending specially crafted paths, the server can access, read, write, delete, and list files in directories outside the intended shared folder on the client's system. This could lead to unauthorized access and manipulation of sensitive data. Red Hat severity: Moderate — CVSS 6.3 (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L). Weakness: CWE-22. Affected Red Hat products: Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 6; Red Hat Enterprise Linux 7; Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 9. Will not fix / out of support: Red Hat Enterprise Linux 6; Red Hat Enterprise Linux 7. Red Hat does not currently list a fixing RHSA for this CVE. Affected products named by the advisory: Red Hat package: freerdp.
Medium [CVE-2026-67300] Use-After-Free vulnerability leading to denial of service
FreeRDP before 3.29.0 contains client-side heap use-after-free vulnerabilities in the async update message proxy for RAIL WINDOW_STATE_ORDER and NOTIFY_ICON_STATE_ORDER when AsyncUpdate is enabled. When a malicious or compromised RDP server sends crafted update orders, the message proxy shallow-copies structures containing nested parser-owned pointers (e.g., titleInfo.string, windowRects, visibilityRects, icon buffers). The parser frees those nested buffers after the callback returns, so the queued async message later dispatches stale pointers, potentially causing memory corruption or a client crash. A flaw was found in FreeRDP. This client-side heap use-after-free vulnerability occurs when a malicious or compromised Remote Desktop Protocol (RDP) server sends specially crafted update orders. The async update message proxy incorrectly handles memory by shallow-copying structures with pointers that are later freed by the parser. This leads to the use of stale pointers, which can cause memory corruption or a client crash, resulting in a denial of service. Red Hat severity: Moderate — CVSS 6.5 (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H). Weakness: CWE-825. Affected Red Hat products: Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 6; Red Hat Enterprise Linux 7; Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 9.
Medium [CVE-2026-67292] Information Disclosure and Denial of Service via WebSocket Ping
FreeRDP before 3.29.0 contains a buffer over-disclosure vulnerability in the gateway WebSocket transport (libfreerdp/core/gateway/websocket.c). The client's Pong reply reuses a fixed 1024-byte response stream whose length is not sealed to the actual received Ping payload, so a malicious gateway/WebSocket peer sending a non-empty Ping control frame causes the client to reply with an overlong Pong that discloses bytes beyond the received payload (the peer receives the masking key and can unmask the reply). A zero-length Ping reaches an assertion and terminates the client (denial of service). A flaw was found in FreeRDP, a remote desktop protocol client. This could cause the client to send an overly long Pong reply, leading to the disclosure of sensitive information beyond the intended payload. This issue is classified as Moderate severity because successful exploitation requires a user to connect to a malicious gateway or server, where a crafted Ping control frame can trigger a client memory disclosure or cause an application crash leading to a denial of service. Red Hat severity: Moderate — CVSS 6.5 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L). Weakness: CWE-805. Affected Red Hat products: Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 6; Red Hat Enterprise Linux 7; Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 9.
Medium [CVE-2026-67299] Denial of Service via crafted WindowIcon async message
FreeRDP before 3.29.0 contains a client-side heap use-after-free in the async update message proxy for WINDOW_ICON_ORDER when AsyncUpdate is enabled (e.g. xfreerdp /async-update). In update_message_WindowIcon() a shallow CopyMemory() overwrites a freshly allocated lParam->iconInfo with the parser-owned windowIcon->iconInfo pointer. After the parser callback returns, update_recv_window_info_order() frees window_icon.iconInfo, but the queued async message still retains and later dispatches that stale pointer. A malicious or compromised RDP server sending a crafted RAIL Window Alternate Secondary Order with WINDOW_ORDER_ICON can trigger use-after-free, leading to memory corruption and client crash. A flaw was found in FreeRDP. A malicious or compromised Remote Desktop Protocol (RDP) server can exploit a heap use-after-free vulnerability when a client connects with asynchronous updates enabled. This leads to memory corruption and a denial of service on the client system, but requires user interaction with a compromised server. Red Hat severity: Moderate — CVSS 6.5 (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H). Weakness: CWE-416.
Medium [CVE-2026-67318] Denial of Service due to maxBodyLength bypass in HTTP/2 requests
axios versions >=1.13.0 (Node.js HTTP adapter) fail to enforce the configured maxBodyLength limit on streamed request bodies when requests are sent with httpVersion: 2. Because Node's HTTP/2 request API does not honor the maxBodyLength option and axios's byte-counting stream wrapper is gated on maxRedirects === 0, an attacker who controls a stream passed to axios can cause the application to transmit outbound data exceeding the configured finite maxBodyLength. Impact is limited to resource consumption and policy bypass (excess egress, upstream quota consumption, limited availability); it does not enable code execution, credential disclosure, or request-destination control. Calls using the default maxBodyLength: -1 and browser adapters are not affected. A flaw was found in axios, a popular JavaScript library for making HTTP requests. This allows a remote attacker, by controlling the input stream, to send an arbitrarily large amount of data. The primary impact is excessive resource consumption, increased network egress, and potential denial of service for the affected application. Red Hat severity: Moderate — CVSS 5.3 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L). Weakness: CWE-770. Affected products named by the advisory: Red Hat Hardened Images; Migration Toolkit for Applications 8; Migration Toolkit for Containers; Multicluster Engine for Kubernetes; and 15 more.
Medium [CVE-2026-67315] NO_PROXY bypass allows exposure of local services
axios versions 0.31.0 before 0.33.0 and 1.15.0 before 1.18.0 fail to recognize 0.0.0.0 as a loopback address in shouldBypassProxy.js, allowing requests to 0.0.0.0 to bypass NO_PROXY rules. Attackers can supply 0.0.0.0 URLs to route requests through configured proxies, potentially exposing local services when the proxy can reach the destination. A flaw was found in axios. This vulnerability occurs because the software fails to correctly identify 0.0.0.0 as a local loopback address when evaluating NO_PROXY rules. A remote attacker could exploit this by providing a 0.0.0.0 URL, causing requests to bypass intended proxy restrictions. This could lead to the exposure of internal services to the configured proxy, potentially allowing unauthorized access to local resources. Red Hat severity: Moderate — CVSS 5.8 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N). Weakness: CWE-115. Affected products named by the advisory: Red Hat Hardened Images; Migration Toolkit for Applications 8; Migration Toolkit for Containers; Multicluster Engine for Kubernetes; and 15 more.
Medium [CVE-2026-67319] Information disclosure and data manipulation via prototype pollution
axios before 0.33.0 (and 1.x before 1.18.0) can consume inherited properties from nested request option objects when the JavaScript process's Object.prototype has already been polluted by another component. While the top-level merged config uses a null prototype, nested plain objects such as auth and paramsSerializer are cloned into ordinary objects and read without own-property checks. When an application passes placeholder nested objects such as auth: {} or paramsSerializer: {}, inherited username/password values can cause silent injection of an Authorization: Basic header, and inherited encode/serialize values can alter query-string serialization (full serializer replacement requires a function-valued pollution primitive). This is exploitable only in the presence of pre-existing prototype pollution. A flaw was found in axios. When the JavaScript environment's `Object.prototype` has been previously compromised through a technique known as prototype pollution, axios can inadvertently use malicious properties from nested configuration objects. This can lead to the silent injection of unauthorized authentication headers, potentially exposing sensitive credentials. Additionally, it could allow an attacker to alter how data is formatted for requests, leading to data manipulation.
Medium [CVE-2026-67291] Denial of Service via heap out-of-bounds read
Denial of Service via heap out-of-bounds read. Red Hat rates this moderate (CVSS 6.5). Weakness: CWE-125.
Medium [CVE-2026-67303] Denial of Service via unsupported serial device control request
Denial of Service via unsupported serial device control request. Red Hat rates this moderate (CVSS 4.3). Weakness: CWE-617.
Medium [CVE-2026-67288] Denial of Service via crafted smartcard cache requests
FreeRDP before 3.29.0 contains a null pointer dereference vulnerability in smartcard cache request decoders that accept NULL NDR pointers for LookupName in SCARD_IOCTL_READCACHEA and SCARD_IOCTL_WRITECACHEA operations. When smartcard emulation is enabled, attackers can send crafted smartcard cache requests with NULL lookup-name pointers to trigger strlen() on a null pointer, causing client process termination. A flaw was found in FreeRDP. This can lead to a null pointer dereference, causing the client process to terminate and disrupting active remote desktop sessions. A Moderate denial of service flaw affects FreeRDP in Red Hat products. When smartcard emulation is enabled, a remote attacker can exploit this vulnerability by sending malformed smartcard cache requests, leading to a null pointer dereference and subsequent termination of the FreeRDP client process. This can disrupt active remote desktop sessions for affected users. Red Hat severity: Moderate — CVSS 5.3 (CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:H). Weakness: CWE-476. Affected products named by the advisory: Red Hat Enterprise Linux 10.0 Extended Update Support; Red Hat Enterprise Linux 7 Extended Lifecycle Support; Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support; Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On; and 8 more.
Medium [CVE-2026-66402] Server Identity Verification Bypass via TLS Certificate Validation Weaknesses
FreeRDP before 3.29.0 (affected versions <= 3.28.0) contains multiple TLS certificate identity validation weaknesses in tls_verify_certificate(), tls_match_hostname(), and x509_utils_get_dns_names(). Because FreeRDP performs custom Common Name and DNS SAN string matching instead of using OpenSSL's length-aware identity validation APIs, it (1) truncates DNS SAN values at embedded NUL bytes (accepting e.g. 'victim.example\0.attacker.example' as 'victim.example'), (2) accepts a matching Common Name even when non-matching DNS SAN entries are present, and (3) accepts IP-literal targets via DNS/CN matching without comparing iPAddress SANs. Under a trusted or misissued certificate chain, an attacker positioned to present such a certificate can bypass server identity verification, weakening TLS server authentication. A flaw was found in FreeRDP. This flaw involves multiple weaknesses in how FreeRDP validates TLS (Transport Layer Security) certificates. FreeRDP's custom validation logic can incorrectly process DNS Subject Alternative Name (SAN) values, accept Common Names without proper comparison to other SAN entries, and fail to validate IP address SANs for IP-literal targets. Affected products named by the advisory: Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 6; Red Hat Enterprise Linux 7; Red Hat Enterprise Linux 8; and 2 more.
Medium [CVE-2026-67338] Stored cross-site scripting in Extension Manager allows arbitrary code execution
Stored cross-site scripting in Extension Manager allows arbitrary code execution. Red Hat rates this moderate (CVSS 6.1). Weakness: CWE-79. Affected products named by the advisory: Migration Toolkit for Applications 8; Red Hat OpenShift AI (RHOAI).
Medium [CVE-2026-67296] Denial of Service due to RDPEI message processing
Denial of Service due to RDPEI message processing. Red Hat rates this moderate (CVSS 6.5). Weakness: CWE-20.
Medium [CVE-2026-67304] Denial of Service via null pointer dereference in smartcard cleanup
Denial of Service via null pointer dereference in smartcard cleanup. Red Hat rates this moderate (CVSS 6.5). Weakness: CWE-476.
Medium [CVE-2026-67289] HTTP Proxy Request Injection via Redirection
FreeRDP before 3.29.0 (affected versions <= 3.28.0) does not validate CRLF and control characters in the server-controlled RDP redirection TargetNetAddress field. This value is copied into the client's ServerHostname and, when the client connects through an HTTP proxy, is written directly into the proxy CONNECT request line and Host header by http_proxy_connect() without filtering. A malicious or compromised RDP server can send a crafted redirection PDU containing embedded control characters to inject arbitrary headers/requests into the HTTP proxy CONNECT request. A flaw was found in FreeRDP. This injection could allow an attacker to manipulate the proxy's behavior or bypass certain network security policies. Moderate: This client-side vulnerability in FreeRDP allows for HTTP proxy request injection. Exploitation requires a FreeRDP client to be configured to use an HTTP proxy and to connect to a malicious or compromised RDP server, which then sends a crafted redirection PDU. This limits the attack surface to specific client configurations and interactions with untrusted RDP endpoints. Red Hat severity: Moderate — CVSS 5 (CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:L). Weakness: CWE-93.
Medium [CVE-2026-67293] Weakens TLS server authentication due to improper wildcard certificate hostname validation
FreeRDP before 3.29.0 (affected versions <= 3.28.0) contains an improper certificate hostname validation vulnerability. The TLS hostname matcher (tls_match_hostname() in libfreerdp/crypto/tls.c) treats a wildcard pattern such as *.example.com as matching any hostname ending in.example.com, so it incorrectly accepts a wildcard certificate for multi-label subdomains like a.b.example.com (which OpenSSL's X509_check_host() rejects). This weakens TLS server authentication under wildcard-certificate conditions. A flaw was found in FreeRDP, a free implementation of the Remote Desktop Protocol (RDP). The software's Transport Layer Security (TLS) hostname matcher incorrectly validates wildcard certificates, allowing it to accept certificates for multi-label subdomains that should not be covered. This vulnerability could enable a remote attacker to impersonate a legitimate server, potentially compromising the authenticity of the connection. This weakens the overall security of TLS server authentication. This could allow a malicious RDP server to impersonate a legitimate server if a client attempts to connect to a subdomain covered by an improperly validated wildcard certificate. Red Hat severity: Moderate — CVSS 4.2 (CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N). Weakness: CWE-295.
Medium [CVE-2026-67317] Denial of Service via maxBodyLength bypass with ReadableStream
axios versions 1.7.0 before 1.18.0 fail to enforce maxBodyLength for WHATWG ReadableStream request bodies in the fetch adapter when Content-Length cannot be determined. Attackers can supply unknown-length stream data to bypass upload size limits and cause uncontrolled network egress or resource exhaustion. A flaw was found in axios. This can lead to uncontrolled network egress or resource exhaustion, resulting in a Denial of Service (DoS) for the affected system. Moderate: This flaw in `axios` allows for a denial of service by bypassing `maxBodyLength` enforcement. Red Hat severity: Moderate — CVSS 5.3 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L). Weakness: CWE-770. Affected Red Hat products: Red Hat Hardened Images; Migration Toolkit for Applications 8; Migration Toolkit for Containers; Multicluster Engine for Kubernetes; Network Observability Operator; OpenShift Pipelines; OpenShift Service Mesh 3; Red Hat Advanced Cluster Management for Kubernetes 2; Red Hat Advanced Cluster Security 4; Red Hat Ansible Automation Platform 2; Red Hat build of Apicurio Registry 3; Red Hat Enterprise Linux AI (RHEL AI) 3; Red Hat OpenShift AI (RHOAI); Red Hat OpenShift Container Platform 4; Red Hat OpenShift Dev Spaces; Red Hat OpenShift Virtualization 4; Red Hat Quay 3; Red Hat Satellite 6; Red Hat Trusted Profile Analyzer; Self-service automation portal 2.
Medium [CVE-2026-67297] Resource exhaustion due to oversized chunked HTTP responses
Resource exhaustion due to oversized chunked HTTP responses. Red Hat rates this moderate (CVSS 6.5). Weakness: CWE-770.
Medium [CVE-2026-67301] Memory disclosure or denial of service via crafted RDP update orders
Memory disclosure or denial of service via crafted RDP update orders. Red Hat rates this moderate (CVSS 5.9). Weakness: CWE-125.
Medium [CVE-2026-67290] Denial of Service via malformed media data
Denial of Service via malformed media data. Red Hat rates this moderate (CVSS 6.5). Weakness: CWE-125.
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