kernel vulnerability

A high‑severity memory‑safety flaw in Portwell Engineering Toolkits (version 4.8.2) — tracked as CVE‑2026‑3437 — lets a local, authenticated user read and write arbitrary kernel memory through the product’s driver, creating a realistic path to local privilege escalation and denial‑of‑service on...

Security researchers have publicly released a working proof‑of‑concept (PoC) that reliably forces a Windows host into an unrecoverable Blue Screen of Death (BSoD) by abusing a logic bug in the Common Log File System driver (CLFS.sys), tracked as CVE‑2026‑2636 — a locally‑triggerable...

A subtle misstep in nftables object handling created a classic kernel-level use‑after‑free that has since rippled through distributions and cloud images: an nft object or expression could point to a set in a different nft table, and when that table was removed the remaining dangling reference...

The Linux kernel vulnerability tracked as CVE-2024-39495 is a use-after-free in the greybus subsystem (gb_interface_release) triggered by a race between workqueue execution and object teardown, and Microsoft’s Security Response Center (MSRC) has publicly attested that Azure Linux includes the...

Microsoft’s short advisory line — “Azure Linux includes this open‑source library and is therefore potentially affected by this vulnerability” — is accurate for the product Microsoft has inventory‑checked, but it is a product‑scoped attestation, not proof that no other Microsoft product or...

CVE-2025-38181 is a kernel-level null-pointer dereference in the CALIPSO option handling that was fixed upstream by defensive checks in calipso_req_setattr() and calipso_req_delattr(); Microsoft’s Security Response Center (MSRC) has publicly attested that Azure Linux includes the implicated...

The Linux kernel bug tracked as CVE-2025-38147 — described upstream as “calipso: Don't call calipso functions for AF_INET sk” — is a relatively compact but meaningful vulnerability whose real-world implications hinge less on dramatic remote code execution and more on software supply-chain and...

No — Azure Linux is the only Microsoft product Microsoft has publicly attested to include the specific open‑source component tied to CVE‑2025‑38122, but that attestation is product‑scoped and does not prove that other Microsoft artifacts cannot also include the same vulnerable upstream Linux...

Microsoft’s public advisory that “Azure Linux includes this open‑source library and is therefore potentially affected” is accurate — but it is a product‑scoped attestation, not a claim that Azure Linux is the only Microsoft product that could contain the vulnerable kernel code. erview...

A subtle memory-management mistake in the Intel ISH HID driver has been assigned CVE-2025-21928 and fixed upstream — the bug is a classic use-after-free in ishtp_hid_remove() that can cause random system crashes shortly after the driver is removed and therefore represents a real availability...

A subtle design assumption in the Linux networking stack became a loud wake-up call for kernel maintainers and infrastructure operators in April 2025: CVE‑2025‑21920, tracked as “vlan: enforce underlying device type,” permits VLAN devices to be created on non‑Ethernet interfaces and, in doing...

The Linux kernel vulnerability tracked as CVE‑2024‑58093 — a PCI/ASPM (PCI Express Active State Power Management) bug that can lead to use‑after‑free crashes during certain hot‑unplug sequences — has been publicly fixed upstream and widely patched by Linux distributors. Microsoft’s Security...

A newly disclosed Linux-kernel vulnerability in the Bluetooth L2CAP implementation — tracked as CVE-2025-21969 — is a slab use-after-free in l2cap_send_cmd that can trigger kernel memory corruption and sustained denial-of-service, and it has been fixed upstream by synchronizing the HCI receive...

Microsoft’s short MSRC wording that “Azure Linux includes this open‑source library and is therefore potentially affected” is accurate — but it is a scoped inventory attestation, not a technical guarantee that no other Microsoft product could contain the same vulnerable Linux kernel code. erview...

Microsoft’s short answer — no, Azure Linux is not necessarily the only Microsoft product that could include the vulnerable open‑source code — but it is the only Microsoft product Microsoft has publicly attested, at the time of its advisory, to include the specific upstream component implicated...

The concise answer is: No — Azure Linux is the only Microsoft product that Microsoft has publicly attested as including the implicated upstream component for CVE‑2025‑39790, but that attestation is product‑scoped and time‑boxed; it does not prove that other Microsoft artifacts cannot contain the...

The Linux kernel received a small but important fix in April 2024 that replaces a non‑zeroed allocation with a zeroing allocator in the file‑handle path — closing an information‑leak uncovered by syzbot and flagged as CVE‑2024‑26901. The change is surgical (replace kmalloc() with kzalloc() in...

A subtle but serious race-condition bug in the Linux kernel’s ATA over Ethernet (AoE) driver—tracked as CVE-2024-26898—has been fixed after researchers found a premature release of a network device reference that can produce a use-after-free condition. The flaw lives inside the aoecmd_cfg_pkts()...

Microsoft’s security telemetry and vendor advisories have confirmed a high‑impact vulnerability in the Windows kernel HTTP protocol stack: an elevation‑of‑privilege issue affecting the HTTP.sys driver. Administrators should treat this as an urgent remediation item for any hosts that bind...

Microsoft’s public record for CVE-2026-21239 identifies a kernel-level elevation of privilege in Windows and pairs that entry with Microsoft’s new “confidence” indicator — a vendor signal that shapes how defenders should triage, patch, and hunt for this class of risk. The entry is short on...