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Red Hat disclosed CVE-2026-50526, a moderate-severity flaw in .NET caused by improper link resolution before file access, tracked as CWE-59. The vulnerability allows an authorized local attacker to exploit link following behavior to tamper with files, potentially modifying application data or system files outside the intended target. Red Hat assigned the issue a CVSS v3 score of 7.0, while the NVD scored it 5.5, reflecting different assessments of the flaw's impact.
The weakness matches the broader link following class in which software accesses a file path without preventing resolution through symlinks, hard links, shortcuts, or similar mechanisms, creating opportunities for unauthorized read or write operations. Red Hat reported fixes across multiple RHEL 8, 9, and 10 product lines, including specialized support channels such as RHEL 10.0 EUS, RHEL 9.4 Update Services for SAP Solutions, and RHEL 9.6 EUS, with remediation delivered through RHSA advisories published in July and August 2026.
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Red Hat published security errata on July 20, 2026 addressing CVE-2026-50526 for multiple .NET packages on Red Hat Enterprise Linux 8, 9, and 10, including dotnet8.0, dotnet9.0, and dotnet10.0 across those product lines.
Red Hat states that CVE-2026-50526, a .NET improper link resolution vulnerability allowing authorized local tampering, was made public on July 14, 2026.
Red Hat published additional errata on August 24, 2026 for CVE-2026-50526 covering RHEL 10.0 Extended Update Support, RHEL 9.4 Update Services for SAP Solutions, and RHEL 9.6 Extended Update Support.
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Red Hat disclosed and remediated **CVE-2026-50649**, an **Important** .NET vulnerability caused by `CWE-502` deserialization of untrusted data that can allow a local, unauthorized attacker to execute code. The company assigned the flaw a **CVSS v3 score of 7.8** and said exploitation requires local access, low attack complexity, no privileges, and user interaction, with potential impact to confidentiality, integrity, and availability. Affected products included multiple .NET package streams across **Red Hat Enterprise Linux 8, 9, and 10**, along with related extended support variants and **Red Hat Hardened Images**. Red Hat published security errata in July and August to deliver fixes across those product lines, while the underlying weakness reflects a broader class of unsafe deserialization bugs that can let attacker-controlled data trigger unintended object behavior and, in some cases, arbitrary code execution through gadget chains.
Aug 24, 2026
Microsoft disclosed **CVE-2026-72971**, an **Important** tampering vulnerability in the Windows Container Isolation FS Filter Driver (`unionfs.sys`). The flaw stems from **improper link resolution before file access**, mapped to **`CWE-59`**, and could allow a locally authorized attacker with low privileges to modify or redirect file operations without user interaction. Microsoft assigned the issue a **CVSS v3.1 score of 5.5**, said exploitation was **less likely**, and noted the vulnerability had been **publicly disclosed** but was **not known to be exploited** at publication. `CWE-59`, commonly known as **link following**, covers cases where software accesses a file path without ensuring it does not resolve to an unintended symbolic link, hard link, shortcut, or similar target. MITRE notes that such weaknesses can enable unauthorized file reads, file modification, protection bypass, and in some cases code execution, particularly when combined with predictable filenames, race conditions, or non-atomic file handling. Microsoft released a fix for the `unionfs.sys` issue alongside the advisory.
Aug 13, 2026
**CVE-2023-3390** is an important-severity use-after-free flaw in the Linux kernel's Netfilter/nftables subsystem. Improper handling of named and anonymous sets in batch requests can allow a local attacker with `CAP_NET_ADMIN` to read and write arbitrary kernel memory, potentially causing denial of service or escalating privileges. Red Hat rates the vulnerability **CVSS 7.8** (`AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H`). Unprivileged user namespaces can enable local unprivileged RHEL users to obtain the capability needed for exploitation. Red Hat released fixes for affected RHEL 8 `kernel`, `kernel-rt`, and `kpatch` packages, with updates issued from September 2023 through March 2024. OpenShift control-plane hosts contain the affected component, but Red Hat assesses container exploitation risk as low because OpenShift namespace controls prevent containers from obtaining the required capability.
Aug 26, 2026