Red Hat Enterprise Linux 6 vulnerabilities
765 known vulnerabilities in Red Hat Enterprise Linux 6 from Red Hat. 765 are rated high or critical, and 5 have been exploited in real attacks. Each entry lists the affected versions and the release that fixes it, where the vendor has published one.
Latest first
- 7.8 High severity
Red Hat Enterprise Linux 6: Missing Authorization
A flaw was found in abrt. The completeness check introduced to mitigate CVE-2026-54228 and CVE-2026-54229 only verifies that a dump directory contains a "count" element, which an unprivileged user can create. This allows a local attacker to bypass the guard an
- 7.5 High severity
Red Hat Enterprise Linux 10: Out-of-bounds Write
A flaw was found in freeradius. An improper length validation in the EAP-FAST module allows a stack-based buffer overflow during session ticket processing. A remote, unauthenticated attacker can exploit this flaw by sending a specially crafted handshake reques
- 7.5 High severity
Red Hat Enterprise Linux 10: Out-of-bounds Write
A flaw was found in freeradius's Extensible Authentication Protocol Method for Subscriber Identity Module (EAP-SIM) module. When handling authentication requests, the server copies a client-supplied identity into an internal structure without properly checking
- 7.9 High severity
Red Hat Enterprise Linux 10: Exposure of Private Personal Information to an Unauthorized Actor
A flaw was found in the interaction between systemd-gpt-auto-generator and confidential computing guest VM images in OpenShift Sandboxed Containers (confidential peer pods). systemd-gpt-auto-generator automatically discovers and mounts GPT partitions by type G
- 7.6 High severity
Red Hat Enterprise Linux 6: Out-of-bounds Write
A flaw was found in BusyBox. The udhcpc6 DHCPv6 client does not properly validate the size of network options sent by a server before copying them into memory. A malicious DHCPv6 server on the local network can exploit this flaw by sending a crafted reply, tri
- 7.5 High severity
Red Hat Enterprise Linux 6: Out-of-bounds Write
A flaw was found in BusyBox. When the httpd web server processes subdirectory configuration files, an overly long index page name can trigger a stack-based buffer overflow. An attacker with permissions to write to a subdirectory configuration file could exploi
- 7.5 High severity
Red Hat Enterprise Linux 6: Out-of-bounds Write
A flaw was found in BusyBox. When the TFTP (Trivial File Transfer Protocol) client requests a custom small block size and receives a standard response, it falls back to the default block size without resizing the allocated memory buffer. A malicious TFTP serve
- 7.5 High severity
Red Hat Enterprise Linux 6: Out-of-bounds Write
A flaw was found in BusyBox. When resuming a download over File Transfer Protocol (FTP), the wget utility fails to verify that the resume offset does not exceed the file size reported by the server, resulting in an integer calculation error. A malicious FTP se
- 7.5 High severity
Red Hat Enterprise Linux 10: Out-of-bounds Read
A flaw was found in GStreamer's gst-plugins-base RTCP SDES packet parser. A remote sender able to reach an active media session can supply a malformed SDES entry whose declared length exceeds the received packet. Missing bounds validation can cause the receive
- 7.1 High severity
Red Hat Enterprise Linux 10: Out-of-bounds Write
A flaw was found in GStreamer's MXF demuxer. When an application processes a crafted MXF file, an off-by-one bounds check can allow a one-byte write past the logical end of a temporal offset array. This may corrupt memory and cause the application to crash. Th
- 7.5 High severity
Red Hat Enterprise Linux 10: Incorrect Behavior Order: Early Amplification
decode_sequence_of() in lib/krb5/asn.1/asn1_encode.c in MIT Kerberos 5 (aka krb5) 1.11 and later grows the decoded element array one entry at a time, which allows remote attackers to cause a denial of service (CPU consumption in the KDC) by sending an unauthen
- 7.5 High severity
Red Hat Enterprise Linux 10: Missing Release of Resource after Effective Lifetime
The AUTH_GSSAPI handler in lib/rpc/svc_auth_gssapi.c in MIT Kerberos 5 (aka krb5) 1.5.2 and later allows remote attackers to cause a denial of service (memory exhaustion in kadmind) by sending repeated failed AUTH_GSSAPI_INIT requests. Each failed request allo
- 7.5 High severity
Red Hat Enterprise Linux 10: Allocation of Resources Without Limits or Throttling
clean_client() in lib/rpc/svc_auth_gssapi.c in MIT Kerberos 5 (aka krb5) restarts its scan from the head of the client list after each removal, resulting in quadratic CPU cost. Remote attackers can cause a denial of service (CPU consumption in kadmind) by accu
- 7.5 High severity
Red Hat Enterprise Linux 10: Missing Release of Resource after Effective Lifetime
The AUTH_GSSAPI handler in lib/rpc/svc_auth_gssapi.c in MIT Kerberos 5 (aka krb5) does not free decoded arguments on certain error paths, which allows remote attackers to cause a denial of service (memory exhaustion in kadmind) via crafted AUTH_GSSAPI_INIT req
- 7.5 High severity
Red Hat Enterprise Linux 10: Missing Release of Resource after Effective Lifetime
The GSS-RPC transport layer in MIT Kerberos 5 (aka krb5) 1.4 and later does not release the previous authentication context when a client switches from an RPCSEC_GSS or AUTH_GSSAPI flavor to a non-GSS flavor on the same TCP connection. This allows remote attac
- 7.5 High severity
Red Hat Enterprise Linux 10: Missing Release of Resource after Effective Lifetime
clnttcp_call() in lib/rpc/clnt_tcp.c in MIT Kerberos 5 (aka krb5) does not free the RPC reply verifier between retries, which allows remote attackers to cause a denial of service (memory leak in GSS-RPC client programs) by injecting RPC replies with mismatched
- 7.5 High severity
Red Hat Enterprise Linux 10: External Control of File Name or Path
A flaw was found in GStreamer's adaptive streaming demuxers (HLS, DASH, MSS). When processing a media playlist or manifest, URIs referenced in the manifest content are fetched without restricting which URI schemes are permitted. An attacker who controls a mani
- 7.5 High severity
Red Hat Enterprise Linux 10: Stack-based Buffer Overflow
A flaw was found in the GNU debugger (GDB). When GDB connects to a remote debug target, a malicious target can cause GDB to overflow a buffer on the stack while parsing the target's replies. This can crash GDB or potentially allow the target to execute arbitra
- 8.1 High severity
Red Hat Enterprise Linux 10: Heap-based Buffer Overflow
A heap buffer overflow in gdbserver's QTDPsrc packet handler allows an unauthenticated remote attacker to achieve native code execution in the gdbserver process. The vulnerability results from a mismatch between a packet's declared source length and the actual
- 8.2 High severity
Red Hat Enterprise Linux 10: Untrusted Pointer Dereference
A length validation flaw in gdbserver's agent-expression parser allows an unauthenticated remote attacker to read uninitialized heap memory from the gdbserver process and cause a denial of service. Disclosed heap content includes addresses suitable for defeati
- 7.5 High severity
Red Hat Enterprise Linux 10: Stack-based Buffer Overflow
A stack buffer overflow in the GDB client's tracepoint upload handler allows an attacker-controlled debug stub to corrupt stack memory automatically during connection setup. The overflow results from GDB reading beyond the current reply boundary into a stale p
- 8.8 High severity
Red Hat Enterprise Linux 10: Stack-based Buffer Overflow
A stack buffer overflow in the GDB client's remote protocol handler allows an attacker-controlled debug target to execute arbitrary code in the GDB process. The vulnerability exists in fetch_register_using_p, which decodes a stub's register reply into an alloc
- 7.8 High severity
Red Hat Enterprise Linux 9: Stack-based Buffer Overflow
A flaw was found in GIMP. The PSD plug-in’s image resource header loader uses an incorrect destination size when copying a converted resource name into a fixed stack buffer. Opening a crafted PSD file can cause a stack-based buffer overflow, leading to a crash
- 7.5 High severity
Red Hat Enterprise Linux 10: Uncontrolled Resource Consumption
A flaw was found in glib-networking. When establishing connections using Transport Layer Security (TLS) version 1.3, the client-side session cache does not limit the number of session tickets retained for a single host. A malicious server can exploit this by s
- 8.1 High severity
Samba: Improper Handling of Case Sensitivity
An access control bypass flaw was identified in Samba's vfs_ceph_rgw module in it's openat() function. An authenticated user can bypass access controls to read or overwrite restricted files on shares configured with the experimental vfs_ceph_rgw module. When a
- 7.1 High severity
Red Hat Enterprise Linux 10: Out-of-bounds Read
A flaw was found in the iscsiuio component of open-iscsi. The IPv6 Neighbor Discovery handler accesses link-layer address options at a fixed offset without verifying the packet contains them. Additionally, the ARP table is updated unconditionally with attacker
- 7.6 High severity
Red Hat Enterprise Linux 10: Out-of-bounds Read
A flaw was found in the iscsiuio component of open-iscsi. The DHCPv4 option parser incorrectly calculates the length of the options data, causing it to read beyond the allocated buffer into adjacent heap memory. An attacker on the same network segment can send
- 7.3 High severity
Red Hat Enterprise Linux 8: Incorrect Use of Privileged APIs
A flaw was found in Ghostscript as shipped with Red Hat Enterprise Linux 8. The correction for CVE-2019-14869 was omitted during the rebase from version 9.25 to 9.27, leaving privileged .forceput operations in the .charkeys procedure insufficiently protected.
- 7.8 High severity
Red Hat Enterprise Linux 9: Use After Free
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.
- 7.8 High severity
Red Hat Enterprise Linux 9: Use After Free
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 cr
- 7.8 High severity
Red Hat Enterprise Linux 8: Stack-based Buffer Overflow
A flaw was found in GIMP. The PSD thumbnail resource loader performs a BGR-to-RGB channel swap with a fixed 3-byte stride and does not verify that the JPEG thumbnail is RGB. A crafted grayscale PSD thumbnail can cause a heap out-of-bounds read and write in the
- 7.1 High severity
Red Hat Enterprise Linux 9: Out-of-bounds Read
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.
- 7.0 High severity
Red Hat Enterprise Linux 10: Integer Overflow or Wraparound
A flaw was found in GIMP. An integer overflow occurs in the file-pvr plug-in when calculating memory buffer sizes for image dimensions. By tricking a user into opening or previewing a specially crafted PowerVR (.pvr) file, an attacker can trigger a heap-based
- 7.5 High severity
Red Hat Enterprise Linux 6: Out-of-bounds Write
A flaw was found in spice-server. Multiple migration data handlers use client-supplied offsets from SPICE_MSGC_MIGRATE_DATA messages without bounds validation, allowing a malicious authenticated SPICE client during VM live migration to read arbitrary heap memo
- 7.5 High severity
Red Hat Enterprise Linux 6: Integer Overflow or Wraparound
A flaw was found in spice-server. The GLZ encoder dictionary restore path truncates a size_t allocation size to int when calling the malloc callback, allowing a malicious authenticated SPICE client during VM live migration to trigger a massive heap buffer over
- 7.8 High severity
Red Hat Enterprise Linux 10: Improper Neutralization of Argument Delimiters in a Command
A flaw was found in cifs-utils. This flaw allows an unprivileged local user to achieve privilege escalation. When a privileged service mounts a Common Internet File System (CIFS) share using a user-controlled credentials file, input values are not properly san
- 8.4 High severity
Red Hat Enterprise Linux 10: Out-of-bounds Write
A flaw was found in gst-plugins-base. A heap buffer overflow can be triggered when processing video buffers whose attached GstVideoMeta metadata declares plane strides and offsets that exceed the actual backing memory allocation. The metadata is not range-chec
- 7.5 High severity
Red Hat Enterprise Linux 10: Heap-based Buffer Overflow
A heap-based buffer overflow flaw was found in Cyrus SASL. The add_to_challenge() function in the DIGEST-MD5 plugin computes the size of the buffer needed for a challenge/response field before DIGEST-MD5 quoting is applied, but does not recompute that size whe
- 7.8 High severity
Red Hat Enterprise Linux 9: Improper Restriction of Operations within the Bounds of a Memory Buffer
A heap-based buffer overflow was found in GIMP’s DirectDraw Surface (DDS) loader. When loading a crafted DDS image, buffer sizes derived from width, height, and pitch can be computed using 32-bit arithmetic that overflows. The allocated buffer is too small for
- 7.8 High severity
Red Hat Enterprise Linux 10: Out-of-bounds Write
A flaw was found in Ghostscript. When Ghostscript renders a crafted PostScript or EPS document, it can bypass the -dSAFER sandbox and execute arbitrary shell commands in the context of the Ghostscript process. The issue chains memory corruption in document par