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CVE-2026-4948

Firewalld: firewalld: local unprivileged user can modify firewall state due to d-bus setter mis-authorization

A flaw was found in firewalld. A local unprivileged user can exploit this vulnerability by mis-authorizing two runtime D-Bus (Desktop Bus) setters, setZoneSettings2 and setPolicySettings. This mis-authorization allows the user to modify the runtime firewall state without proper authentication, leading to unauthorized changes in network security configurations.

CVSS 3.1 · 5.5 Medium EPSS < 1% KEV · Not listed
Vendors
Firewalld Redhat
Products
Firewalld Enterprise Linux Enterprise Linux Eus and 5 more
CVE-2026-42169

Gimp: gimp apng loader heap-buffer-overflow when fctl width exceeds ihdr width (file-png.c)

A heap-buffer-overflow vulnerability exists in the APNG (Animated PNG) file loader of GIMP. This flaw occurs when the `fcTL` width exceeds the `IHDR` width, leading to pixel data being written past the end of a heap allocation. Additionally, a heap-based buffer overflow exists in the DDS plug-in due to a BPP mismatch in the `load_layer()` function. Both vulnerabilities can be triggered by opening a specially crafted image file, potentially leading to code execution.

CVSS 3.1 · 7.3 High EPSS < 1% KEV · Not listed
Vendors
Gimp Redhat
Products
Gimp Enterprise Linux Enterprise Linux Eus and 3 more
CVE-2026-43958

Rrdtool: rrdtool: stack buffer overflow allows local code execution or denial of service

A flaw was found in rrdcached, a component of rrdtool. A local attacker with access to a rrdcached socket can exploit a stack-based buffer overflow by sending an oversized CREATE request. This vulnerability can lead to a denial of service by crashing the daemon or potentially allow for arbitrary code execution, impacting the integrity and confidentiality of data.

CVSS 3.1 · 7.8 High EPSS < 1% KEV · Not listed
Vendors
Redhat
Products
Enterprise Linux Enterprise Linux Eus Rhel E4s and 2 more
CVE-2026-5260

Gnutls: gnutls: information disclosure via heap overread in rsa key exchange

A flaw was found in libgnutls. A remote attacker, by sending an extremely short premaster secret during an RSA key exchange to a server using an RSA key backed by a PKCS#11 token, could trigger a short heap overread. This memory corruption vulnerability could lead to information disclosure.

CVSS 3.1 · 8.2 High EPSS < 1% KEV · Not listed
Vendors
Gnu Redhat
Products
Gnutls Cert Manager Discovery and 14 more
CVE-2026-34002

Xorg: xwayland: x.org x server: information disclosure or denial of service via out-of-bounds read in xkb modifier map handling

A flaw was found in the X.Org X server. This vulnerability, an out-of-bounds read, affects the XKB (X Keyboard Extension) modifier map handling. An attacker with access to the X11 server can exploit this by sending a malformed request, which causes the server to read beyond its intended memory boundaries. This can lead to the exposure of sensitive information or cause the server to crash, resulting in a denial of service.

CVSS 3.1 · 6.1 Medium EPSS < 1% KEV · Not listed
Vendors
Redhat X.org
Products
Enterprise Linux Enterprise Linux Eus Rhel Aus and 6 more
CVE-2026-34000

Xwayland: xorg: x.org x server: information disclosure and denial of service via out-of-bounds read in xkb geometry processing.

A flaw was found in the X.Org X server. This out-of-bounds read vulnerability in the XKB geometry processing, specifically within the `CheckSetGeom()` and `XkbAddGeomKeyAlias` functions, allows an attacker to read uninitialized or out-of-bounds memory. An attacker with a connection to the X11 server, either locally or remotely, can exploit this without user interaction. This could lead to the disclosure of memory contents or cause a denial of service by crashing the server.

CVSS 3.1 · 6.1 Medium EPSS < 1% KEV · Not listed
Vendors
Redhat X.org
Products
Enterprise Linux Enterprise Linux Eus Rhel Aus and 7 more
CVE-2026-26104

Udisks: missing authorization check allows unprivileged users to back up luks headers via udisks d-bus api

A flaw was found in the udisks storage management daemon that allows unprivileged users to back up LUKS encryption headers without authorization. The issue occurs because a privileged D-Bus method responsible for exporting encryption metadata does not perform a policy check. As a result, sensitive cryptographic metadata can be read and written to attacker-controlled locations. This weakens the confidentiality guarantees of encrypted storage volumes.

CVSS 3.1 · 5.5 Medium EPSS < 1% KEV · Not listed
Vendors
Freedesktop Redhat
Products
Udisks Enterprise Linux Enterprise Linux Eus and 1 more
CVE-2026-18358

Gnome-remote-desktop: gnome-remote-desktop system-mode rdp server missing connection throttling allows unauthenticated denial of service

A flaw was found in gnome-remote-desktop as shipped in Red Hat Enterprise Linux. When the daemon is running in system mode with RDP enabled, the incoming connection handler bypasses the connection throttler, allowing an unauthenticated remote attacker to open many parallel pre-authentication connections to the RDP listener. This can accumulate accepted sockets and pending routing-token operations until timeout, exhausting resources and preventing legitimate users from establishing RDP sessions. This issue does not affect the upstream version.

CVSS 3.1 · 7.5 High EPSS < 1% KEV · Not listed
Vendors
Redhat
Products
Enterprise Linux Enterprise Linux Eus
CVE-2025-6021

Libxml2: integer overflow in xmlbuildqname() leads to stack buffer overflow in libxml2

A flaw was found in libxml2's xmlBuildQName function, where integer overflows in buffer size calculations can lead to a stack-based buffer overflow. This issue can result in memory corruption or a denial of service when processing crafted input.

CVSS 3.1 · 7.5 High EPSS 1.5% KEV · Not listed
Vendors
Redhat Xmlsoft
Products
Discovery Enterprise Linux Enterprise Linux Eus and 27 more
CVE-2025-62231

Xorg: xmayland: value overflow in xkbsetcompatmap()

A flaw was identified in the X.Org X server’s X Keyboard (Xkb) extension where improper bounds checking in the XkbSetCompatMap() function can cause an unsigned short overflow. If an attacker sends specially crafted input data, the value calculation may overflow, leading to memory corruption or a crash.

CVSS 3.1 · 7.3 High EPSS < 1% KEV · Not listed
Vendors
Debian Ibm Redhat and 1 more
Products
Debian Linux Aix Vios and 14 more
CVE-2025-62230

Xorg: xwayland: use-after-free in xkb client resource removal

A flaw was discovered in the X.Org X server’s X Keyboard (Xkb) extension when handling client resource cleanup. The software frees certain data structures without properly detaching related resources, leading to a use-after-free condition. This can cause memory corruption or a crash when affected clients disconnect.

CVSS 3.1 · 7.3 High EPSS < 1% KEV · Not listed
Vendors
Debian Ibm Redhat and 1 more
Products
Debian Linux Aix Vios and 14 more
CVE-2025-5987

Libssh: invalid return code for chacha20 poly1305 with openssl backend

A flaw was found in libssh when using the ChaCha20 cipher with the OpenSSL library. If an attacker manages to exhaust the heap space, this error is not detected and may lead to libssh using a partially initialized cipher context. This occurs because the OpenSSL error code returned aliases with the SSH_OK code, resulting in libssh not properly detecting the error returned by the OpenSSL library. This issue can lead to undefined behavior, including compromised data confidentiality and integrity or crashes.

CVSS 3.1 · 8.1 High EPSS 1.7% KEV · Not listed
Vendors
Libssh Redhat
Products
Libssh Enterprise Linux Enterprise Linux Eus and 4 more
CVE-2026-14476

Sssd: sssd: gpo cache path traversal via unsanitized gpcfilesyspath allows kerberos authentication bypass

A path traversal flaw was found in SSSD's AD GPO provider. The ad_gpo_extract_smb_components() function does not sanitize .. sequences in the gPCFileSysPath LDAP attribute, allowing an attacker with AD GPO management access to write files outside the GPO cache directory as root. On default RHEL configurations with SELinux enforcing, this can be used to inject Kerberos configuration leading to authentication bypass.

CVSS 3.1 · 8 High EPSS < 1% KEV · Not listed
Vendors
Redhat Sssd
Products
Enterprise Linux Enterprise Linux Eus Openshift and 8 more
CVE-2026-11861

Freeipa: idm: ipa: freeipa: obtaining tgs with impersonating cname through trust relationships

A flaw was found in FreeIPA. When a trust relationship is configured between FreeIPA and Active Directory, Active Directory users can bypass authentication for FreeIPA services, including the portal, SMB server, and LDAP directory. This is possible by impersonating a client name in the Ticket Granting Service (TGS) due to FreeIPA services not verifying Privilege Attribute Certificate (PAC) certificates. This vulnerability could allow an authenticated Active Directory user to escalate their privileges within the FreeIPA domain.

CVSS 3.1 · 9.6 Critical EPSS < 1% KEV · Not listed
Vendors
Freeipa Redhat
Products
Freeipa Enterprise Linux Enterprise Linux Eus and 6 more
CVE-2026-11788

389-ds-base: 389-ds-base: null pointer dereference in deref control plugin ber parser

A flaw was found in 389 Directory Server. The dereference control plugin does not check for allocation failure before using a BER structure, allowing an unauthenticated remote attacker to crash the LDAP server when the system is under memory pressure.

CVSS 3.1 · 5.9 Medium EPSS < 1% KEV · Not listed
Vendors
Redhat
Products
389 Directory Server Directory Server Directory Server E4s and 9 more
CVE-2026-11770

389-ds-base: 389-ds-base: pre-auth ldap filter injection in cleanallruv status check

A flaw was found in 389 Directory Server. An unauthenticated remote attacker can inject LDAP search filters into the CleanAllRUV replication status-check extended operation. Because the handler performs the search against cn=config with elevated replication plugin privileges and returns a boolean match result, the attacker can extract sensitive server configuration metadata, including replication bind DNs and password storage scheme information.

CVSS 3.1 · 7.5 High EPSS < 1% KEV · Not listed
Vendors
Port389 Redhat
Products
389-ds-base 389 Directory Server Directory Server and 10 more
CVE-2026-59851

Libssh: libssh: authentication bypass via missing gssapi principal check

A flaw was found in libssh. On servers with GSSAPIKeyExchange enabled, the gssapi-keyex path does not verify whether the authenticated Kerberos principal is authorized for the requested local user, allowing authenticated clients to log in as arbitrary users.

CVSS 3.1 · 8.8 High EPSS < 1% KEV · Not listed
Vendors
Libssh Redhat
Products
Libssh Enterprise Linux Enterprise Linux Eus and 9 more
CVE-2025-2784

Libsoup: heap buffer over-read in `skip_insignificant_space` when sniffing content

A flaw was found in libsoup. The package is vulnerable to a heap buffer over-read when sniffing content via the skip_insight_whitespace() function. Libsoup clients may read one byte out-of-bounds in response to a crafted HTTP response by an HTTP server.

CVSS 3.1 · 7 High EPSS < 1% KEV · Not listed
Vendors
Gnome Redhat
Products
Libsoup Codeready Linux Builder Codeready Linux Builder For Arm64 and 23 more