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CVE-2025-39973 affects the Linux kernel’s Intel i40e Ethernet driver: a malicious virtual function can provide an oversized or misaligned ring_len value that is passed to a hardware memory context without adequate validation. The condition can create excessive transmit or receive queue lengths, potentially resulting in memory corruption or undefined behavior. Red Hat rates the issue Moderate with a CVSS v3.1 score of 7.5, while CVE.org assigns 8.8 under different environmental assumptions; RHEL 7 through 10, including applicable real-time kernels, are listed as affected, while RHEL 6 is not affected.
The defect aligns with CWE-131, incorrect calculation of buffer size, a memory-safety weakness that can lead to out-of-bounds access, crashes, sensitive-data exposure, or code execution. Red Hat’s RHSA-2025:21469 provides updated RHEL 9 kernel packages for multiple kernel security issues and requires a reboot after installation; however, Red Hat’s CVE record separately reports no qualifying mitigation for CVE-2025-39973. Organizations should identify systems using affected i40e hardware and virtual-function configurations, apply applicable vendor kernel updates, reboot hosts, and restrict untrusted VF access where operationally possible.
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Red Hat last modified its CVE-2025-39973 record. The record listed RHEL 7 through 10 kernel packages as affected, stated RHEL 6 was not affected, and reported no applicable security errata or qualifying mitigation.
Red Hat published Moderate-severity advisory RHSA-2025:21469 with updated Linux kernel packages for RHEL 9 and related variants. The update fixes multiple kernel flaws, including KVM, mount, NFS, kernfs, Bluetooth, i40e, and io_uring vulnerabilities; administrators must reboot after installation.
Red Hat published its record for CVE-2025-39973, a Moderate-severity validation flaw in the Linux kernel Intel i40e driver. A malicious virtual function could provide an oversized or misaligned ring_len value, potentially causing excessive queue lengths, memory corruption, or undefined behavior.
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Red Hat released Moderate-severity advisory **RHSA-2025:14438** for Red Hat Enterprise Linux 8 kernel packages, remediating **CVE-2025-38200** and CVE-2025-22058. CVE-2025-38200 affects the Linux kernel's Intel i40e network driver: crafted device input can trigger an integer underflow in `i40e_clear_hw`, causing an MMIO write to an invalid page. Red Hat rates the flaw at CVSS 7.0, while NVD assigns 5.5. Updated kernels are available for RHEL 8 on x86_64, s390x, ppc64le, and aarch64, including applicable Extended Life Cycle 8.10 and CodeReady Linux Builder repositories. The same advisory also fixes a UDP memory-accounting leak tracked as **CVE-2025-22058**. Organizations should apply the relevant kernel updates and reboot affected systems, as the fixes do not take effect until restart.
Aug 26, 2026
**CVE-2023-45871** is an Important-rated buffer overflow in the Linux kernel’s Intel IGB Ethernet driver. When `rx-all`/store-bad-packet behavior is enabled, an oversized physical-layer frame can overflow a receive-ring buffer in `igb_configure_rx_ring`, potentially compromising system confidentiality, integrity, and availability. Red Hat assigned the flaw a CVSS v3.1 score of 7.5; exploitation requires an adjacent-network attacker and is considered high complexity because it depends on oversized frames and a non-default configuration. The upstream kernel fix updates `igb_set_rx_buffer_len` to allocate large receive buffers on systems with page sizes below 8192 bytes when either frames exceed `IGB_MAX_FRAME_BUILD_SKB` or the `E1000_RCTL_SBP` receive-control flag is set. Red Hat released corrected kernel, `kernel-rt`, and `kpatch` packages for affected Red Hat Enterprise Linux 7 and 8 streams in February and March 2024, with no qualifying mitigation listed at the time of its advisory.
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**CVE-2024-52332** affects the Linux kernel's Intel `igb` Ethernet driver. When `pci_register_driver()` fails during `igb_init_module()`, the driver could leave `dca_notifier` registered; a subsequent notifier call could then access invalid memory after the driver installation has failed. The defect, present since kernel version 2.6.29, can cause a local denial of service. Upstream fixes are available in stable kernels 5.4.287, 5.10.231, 5.15.174, 6.1.120, 6.6.66, 6.12.5, and 6.13-rc2. Red Hat rated the flaw **Moderate** with CVSS 4.7, citing required local access, low privileges, high attack complexity, and high availability impact. Fixes were issued for standard kernels in RHEL 9 and RHEL 10 through RHSA-2025:20518 and RHSA-2025:20095; RHEL 10 `kernel-rt` remains affected, while RHEL 9 `kernel-rt` is marked will not fix. Organizations should update to a current vendor-supported kernel release rather than backporting the isolated patch; where patching is not immediately feasible, Red Hat recommends preventing the `igb` module from loading, including by blacklisting it when operationally viable.
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