CVE-2026-94184

Fetchmail: fetchmail: stack-based buffer overflow in ntlm authentication (fetchmail-sa-2026-01)

A stack-based buffer overflow flaw was found in fetchmail when built with NTLM support. A malicious or compromised mail server advertising NTLM authentication can send a crafted Type 2 challenge that causes fetchmail to write past a fixed stack buffer while building the NTLM authenticate response. This may lead to remote code execution depending on stack-frame layout, or to authentication failure or process termination under memory hardening.

CVSS 3.1 · 5.3 Medium EPSS 1.2% KEV · Not listed

Vendors

Redhat

Products

Enterprise Linux Rhel Els

CVE-2026-87853

Sssd: sssd: idp authentication prefix comparison allows cross-user impersonation

A flaw was found in SSSD's IdP authentication provider. The eval_access_token_buf() function compares the OIDC subject identifier using strncmp() with the authenticated user's identifier length, performing a prefix comparison instead of an exact match. An attacker whose IdP identifier is a strict prefix of a target user's identifier can authenticate as the target user.

CVSS 3.1 · 7.5 High EPSS < 1% KEV · Not listed

Vendors

Redhat Sssd

Products

Enterprise Linux Openshift Openshift Container Platform and 2 more

CVE-2026-15711

Libsoup: soupwebsocketconnection: libsoup: websocket remote denial of service via oversized control frame protocol violation

A vulnerability was found in libsoup's WebSocket frame parsing implementation. The library fails to validate length rules specified in RFC 6455 §5.5, which mandates that all WebSocket control frames (e.g., PING, PONG, CLOSE) contain a payload of 125 bytes or less. A remote, unauthenticated attacker can exploit this by sending a non-compliant, oversized control frame. Because the parser handles this protocol violation improperly instead of throwing an immediate connection termination error, it triggers a internal processing crash, resulting in a remote denial of service (DoS) for applications utilizing libsoup WebSockets.

CVSS 3.1 · 7.5 High EPSS < 1% KEV · Not listed

Vendors

Libsoup Redhat

Products

Libsoup Enterprise Linux Enterprise Linux Eus and 6 more

CVE-2026-15709

Soupwebsocketextensiondeflate: libsoup: libsoup: websocket permessage-deflate unbounded decompression remote denial of service

A flaw was found in libsoup's WebSocket implementation when using the permessage-deflate extension. The extension's decompression loop (inflate()) processes data in chunks without enforcing an upper boundary limit on the output buffer size. While libsoup limits the incoming compressed frame size via max_incoming_payload_size, it fails to track or limit memory allocation during decompression. A separate check for decompressed size (max_total_message_size) exists but executes only after inflation is complete, and it is entirely disabled by default for client connections. A remote, unauthenticated attacker can exploit this by sending a small, highly compressed payload (a decompression bomb), causing unbounded memory allocation that triggers an Out-of-Memory (OOM) crash and a Denial of Service (DoS).

CVSS 3.1 · 7.5 High EPSS < 1% KEV · Not listed

Vendors

Libsoup Redhat

Products

Libsoup Enterprise Linux Enterprise Linux Eus and 6 more

CVE-2026-79992

Emacs: emacs: command injection via crafted filenames in tramp

A flaw was found in Emacs TRAMP. A local attacker could exploit this vulnerability by processing maliciously crafted filenames. This occurs because TRAMP concatenates login arguments without proper sanitization, which are then passed to a local shell. Successful exploitation could lead to arbitrary code execution.

CVSS 3.1 · 7.8 High EPSS < 1% KEV · Not listed

Vendors

Redhat

Products

Enterprise Linux Rhel Els

CVE-2026-96889

Librsvg: use-after-free when xml includes have duplicated entities

A flaw was found in librsvg. When processing an SVG document containing nested XML inclusions (Xincludes) with duplicate entity declarations, a use-after-free error can occur. This vulnerability arises because the library incorrectly frees an XML entity that is still in use by the parser. An attacker could potentially exploit this to cause a denial of service or execute arbitrary code.

CVSS 3.1 · 7.8 High EPSS < 1% KEV · Not listed

Vendors

Redhat

Products

Enterprise Linux Enterprise Linux Ai Enterprise Linux Eus and 7 more

CVE-2026-78002

Rsyslog: rsyslog: denial of service via heap buffer overflow in rainerscript replace() function

A flaw was found in rsyslog. An unauthenticated remote attacker can trigger a heap buffer overflow in the RainerScript `replace()` function by sending specially crafted syslog messages. This vulnerability arises from an incorrect buffer size calculation during string replacement, causing memory corruption. Successful exploitation can lead to a denial of service (DoS) for the affected system.

CVSS 3.1 · 7.5 High EPSS 1.1% KEV · Not listed

Vendors

Redhat Rsyslog

Products

Enterprise Linux Enterprise Linux Eus Rhel Aus and 7 more

CVE-2026-102560

Libsoup: libsoup: heap buffer overflow during outgoing permessage-deflate buffer growth

A flaw was found in libsoup. When the permessage-deflate WebSocket extension compresses a very large outgoing message, truncated size calculations used for GByteArray growth could wrap, causing zlib to write past the allocated buffer and resulting in a heap buffer overflow.

CVSS 3.1 · 8.6 High EPSS < 1% KEV · Not listed

Vendors

Gnome Libsoup Redhat

Products

Libsoup Libsoup Enterprise Linux and 4 more

CVE-2026-102559

Libsoup: libsoup: heap buffer overflow during websocket client-frame masking

A flaw was found in libsoup. When constructing a masked WebSocket client frame for a very large outgoing payload, size values passed to GByteArray allocation APIs could be truncated while the masking routine still used the full length, causing a heap buffer overflow.

CVSS 3.1 · 8.6 High EPSS < 1% KEV · Not listed

Vendors

Gnome Libsoup Redhat

Products

Libsoup Libsoup Enterprise Linux and 7 more

CVE-2026-102558

Libsoup: libsoup: heap buffer overflow during websocket receive-buffer growth

A flaw was found in libsoup. When max-incoming-payload-size is unlimited (0), SoupWebsocketConnection could grow its incoming GByteArray based on an attacker-controlled frame length until the length wrapped, causing a heap buffer overflow while reading frame data.

CVSS 3.1 · 8.6 High EPSS < 1% KEV · Not listed

Vendors

Gnome Libsoup Redhat

Products

Libsoup Libsoup Enterprise Linux and 7 more

CVE-2026-102557

Libsoup: libsoup: heap buffer overflow during websocket message reassembly

A flaw was found in libsoup. When reassembling fragmented WebSocket messages into a GByteArray, libsoup did not adequately cap total message size against the limits of the underlying buffer type. A remote peer could send fragments that caused size truncation while the implementation still used the full length, leading to heap corruption or a crash.

CVSS 3.1 · 8.6 High EPSS < 1% KEV · Not listed

Vendors

Gnome Libsoup Redhat

Products

Libsoup Libsoup Enterprise Linux and 7 more

CVE-2026-102556

Libsoup: libsoup: heap buffer overflow from websocket pong signal type confusion

A flaw was found in libsoup. When handling an incoming WebSocket Pong frame, SoupWebsocketConnection emitted the ::pong signal with a GByteArray pointer even though the signal is declared to pass a GBytes. Applications connecting a handler that follows the documented GBytes API can trigger heap corruption or a crash upon receiving a crafted Pong.

CVSS 3.1 · 8.6 High EPSS < 1% KEV · Not listed

Vendors

Gnome Libsoup Redhat

Products

Libsoup Libsoup Enterprise Linux and 7 more

CVE-2026-102555

Libsoup: libsoup: heap buffer overflow via uninitialized length in data-uri base64 decoding

A flaw was found in libsoup. The soup_uri_decode_data_uri() function incorrectly treated base64 data-URI payloads as NUL-terminated strings when calling g_base64_decode_inplace(). If the percent-decoded payload contained embedded NUL bytes, the decoded length could remain uninitialized and be used as the size of the returned GBytes. This can lead to an out-of-bounds read or application crash when processing a crafted data URI.

CVSS 3.1 · 8.2 High EPSS < 1% KEV · Not listed

Vendors

Gnome Libsoup Redhat

Products

Libsoup Libsoup Enterprise Linux and 2 more

CVE-2026-85197

Libsoup: libsoup: heap use-after-free in libsoup http/2 client on_data_read() via goaway during body upload

A flaw was found in libsoup. A malicious HTTP/2 server or a Man-in-the-Middle (MITM) attacker can exploit a heap use-after-free vulnerability in the HTTP/2 client implementation. This occurs when a GNOME application uploads a file using HTTP/2, and the server sends a GOAWAY frame while the file body is being read asynchronously. This can lead to memory corruption, potentially resulting in information disclosure or arbitrary code execution.

CVSS 3.1 · 7.6 High EPSS < 1% KEV · Not listed

Vendors

Libsoup Red Hat Redhat

Products

Libsoup Enterprise Linux Enterprise Linux and 2 more

CVE-2026-42013

Gnutls: gnutls: certificate validation bypass due to oversized subject alternative name

A flaw was found in gnutls. When validating certificates, an oversized Subject Alternative Name (SAN) could cause the validation process to incorrectly fall back to checking the Common Name (CN) field. This could allow a remote attacker to bypass proper certificate validation, potentially leading to spoofing or man-in-the-middle attacks.

CVSS 3.1 · 8.2 High EPSS < 1% KEV · Not listed

Vendors

Gnu Redhat

Products

Gnutls Cert Manager Discovery and 14 more

CVE-2026-42011

Gnutls: gnutls: security bypass due to incorrect name constraint handling

A flaw was found in gnutls. This vulnerability occurs because permitted name constraints were incorrectly ignored when previous Certificate Authorities (CAs) only had excluded name constraints. A remote attacker could exploit this to bypass critical name constraint checks during certificate validation. This bypass could lead to the acceptance of invalid certificates, potentially enabling spoofing or man-in-the-middle attacks against affected systems.

CVSS 3.1 · 7.4 High EPSS < 1% KEV · Not listed

Vendors

Redhat

Products

Cert Manager Discovery Enterprise Linux and 13 more

CVE-2026-16313

Sg3_utils: sg3_utils: arbitrary command execution via udev property injection in sg_inq --export

A flaw was found in sg3_utils. The sg_inq command, when invoked with the --export option, outputs device identification data without sanitizing control characters in SCSI name string fields. A newline character embedded in a device-supplied name string can inject arbitrary properties into the udev device database. This could allow an attacker who can present a crafted SCSI device to execute arbitrary commands as root when the device is disconnected.

CVSS 3.1 · 7.6 High EPSS < 1% KEV · Not listed

Vendors

Redhat

Products

Enterprise Linux Enterprise Linux Eus Openshift and 7 more

CVE-2026-112261

Gimp: gimp: use-after-free in xcf loader via prop_selected_path

A flaw was found in GIMP. Opening a crafted XCF that selects a path and then fails to load that path can cause a use-after-free in the main process, leading to a crash and potentially arbitrary code execution.

CVSS 3.1 · 7.8 High EPSS < 1% KEV · Not listed

Vendors

Gimp Redhat

Products

Gimp Enterprise Linux Rhel Els

CVE-2026-112260

Gimp: gimp: heap out-of-bounds read in xcf text-layer parasite parsing

A flaw was found in GIMP. Opening a crafted XCF with a malformed text-layer parasite can cause a heap out-of-bounds read, disclosing adjacent heap data into layer text and causing denial of service.

CVSS 3.1 · 7.1 High EPSS < 1% KEV · Not listed

Vendors

Gimp Redhat

Products

Gimp Enterprise Linux Rhel Els

CVE-2026-112258

Gimp: gimp: use-after-free in xcf loader via prop_linked and prop_selection on channels

A flaw was found in GIMP. The XCF loader can leave a dangling pointer in the linked-channels list when a linked channel is later destroyed via a selection property. Opening a crafted XCF file can cause a use-after-free in the main GIMP process, leading to a crash and potentially arbitrary code execution.

CVSS 3.1 · 7.8 High EPSS < 1% KEV · Not listed

Vendors

Gimp Redhat

Products

Gimp Enterprise Linux Rhel Els