Threats Tagged 'ubuntu-pro-20-04-lts'

In the Linux kernel, the following vulnerability has been resolved: openvswitch: defer tunnel netdev_put to RCU release ovs_netdev_tunnel_destroy() may run after NETDEV_UNREGISTER already detached the device. Dropping the netdev reference in destroy can race with concurrent readers that still observe vport->dev. Do not release vport->dev in ovs_netdev_tunnel_destroy(). Instead, let vport_netdev_free() drop the reference from the RCU callback, matching the non-tunnel destroy path and avoiding additional synchronization under RTNL.

Ghostscript versions prior to 10.08.0 have a heap-based buffer overflow vulnerability in the JPEG 2000 output adapter. This occurs when processing crafted PDFs containing JPEG 2000 images with mismatched component subsampling factors, causing memory corruption. Exploitation can lead to remote code execution without user interaction.

Squid is a caching proxy for the Web. From 3.3.0.1 to before 7.6, due to an improper enforcement of behavioral workflow bug, Squid is vulnerable to a Request Smuggling attack against HTTP/1.1 Transfer-Encoding. HTTP header parsing (`src/HttpHeader.cc`) accepted the bare` Transfer-Encoding:` identity form, which the HTTP specification prohibits because any transfer coding must be wrapped within chunked encoding. This problem allows a trusted client to perform an HTTP Request Smuggling attack when HTTP/1.1 is used, bypassing security mechanisms that may be in place between attacker and Squid. When there is an HTTP cache operating prior to the affected Squid, this Request Smuggling attack also allows the attacker to poison that web cache and store arbitrary malicious content at any URL for delivery to other clients' future requests. This issue is fixed in version 7.6.

This is a kernel live patch module which can be loaded by the kpatch command line utility to modify the code of a running kernel. This patch module is targeted for kernel-5.14.0-284.134.1.el9_2. Security Fix(es): * kernel: RDMA/mlx4: Fix mis-use of RCU in mlx4_srq_event() (CVE-2026-46181) * kernel: ipv4: free net->ipv4.sysctl_local_reserved_ports after unregister_net_sysctl_table() (CVE-2026-64002) For 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.

The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements. Security Fix(es): * kernel: netfilter: conntrack: remove sprintf usage (CVE-2026-53002) * kernel: netfilter: synproxy: refresh tcphdr after skb_ensure_writable (CVE-2026-64007) * kernel: vhost: reset the vring metadata cache on vring reconfiguration (CVE-2026-74580) * kernel: udp: fix potential use-after-free in tunnel segmentation (CVE-2026-74705) Bug Fix(es) and Enhancement(s): * kernel: vhost: reset the vring metadata cache on vring reconfiguration [rhel-7.9.z] (JIRA:RHEL-224557) For 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.

The kernel packages contain the Linux kernel, the core of any Linux operating system. Security Fix(es): * kernel: xfrm: hold dev ref until after transport_finish NF_HOOK (CVE-2026-31663) * kernel: xfrm: policy: fix use-after-free on inexact bin in xfrm_policy_bysel_ctx() (CVE-2026-53239) * kernel: ip6: vti: Use ip6_tnl.net in vti6_siocdevprivate() (CVE-2026-63921) * kernel: xfrm: input: hold netns during deferred transport reinjection (CVE-2026-63919) * kernel: ip6: vti: Use ip6_tnl.net in vti6_changelink() (CVE-2026-63917) * kernel: xfrm: fix stale skb->prev after async crypto steals a GSO segment (CVE-2026-68426) * kernel: nvmet-auth: reject short AUTH_RECEIVE buffers (CVE-2026-72130) * kernel: udp: fix potential use-after-free in tunnel segmentation (CVE-2026-74705) For 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.

Python is an interpreted, interactive, object-oriented programming language, which includes modules, classes, exceptions, very high level dynamic data types and dynamic typing. Python supports interfaces to many system calls and libraries, as well as to various windowing systems. Security Fix(es): * python: cpython: CPython: tarfile extraction filter bypass allows escaping the destination directory (CVE-2026-11940) * python: Python: CPU Denial of Service in HTML parser via repeated unterminated markup declarations (CVE-2026-15308) For 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.

The curl packages provide the libcurl library and the curl utility for downloading files from servers using various protocols, including HTTP, FTP, and LDAP. Security Fix(es): * curl: curl: Cookie injection via malicious HTTP server using super cookies (CVE-2026-8924) * curl: curl: Information disclosure via incorrect Digest authentication header reuse (CVE-2026-11856) For 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.

The OpenSSL toolkit provides support for secure communications between machines. This version of OpenSSL package contains only the libraries from the 1.1.1 version and is provided for compatibility with previous releases. Security Fix(es): * openssl: heap buffer overflow in CMS key unwrapping (CVE-2026-63072) * openssl: compat-openssl: DTLS Retransmits Handshake Messages From a Stale Buffer Offset (CVE-2026-84782) For 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.

The OpenSSL toolkit provides support for secure communications between machines. This version of OpenSSL package contains only the libraries and is provided for compatibility with previous releases and software that does not support compilation with OpenSSL-1.1. Security Fix(es): * openssl: compat-openssl: DTLS Retransmits Handshake Messages From a Stale Buffer Offset (CVE-2026-84782) For 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.