linux kernel security

The Microsoft page for CVE-2026-23118 appears to be unavailable, but the file search results indicate this is an upstream Linux kernel RxRPC issue involving a data-race warning and possible load/store tearing. The closest matching thread in the uploaded material shows a related RxRPC kernel fix...

The Linux kernel’s F2FS filesystem has received a security-relevant fix for a race condition that can leave the IS_CHECKPOINTED flag in an inconsistent state when atomic commit and checkpoint writes overlap. The issue was discussed on the F2FS mailing list in late December 2025, then applied to...

The Linux kernel’s /proc/net/ptype path is getting a security-focused fix that looks small on the surface but matters because it closes a classic concurrency hole: iterating packet type handlers without enough read-side protection. The issue is tracked as CVE-2026-23255, and the upstream change...

The Linux kernel’s io_uring subsystem is back in the security spotlight, this time for a bug centered on request cleanup in the read/write path. The issue, now tracked as CVE-2026-23259, is described as a failure to free a potentially allocated iovec when cache insertion fails during teardown...

The Microsoft Security Response Center page for CVE-2026-23269 is unavailable, but the underlying issue appears to be an upstream Linux AppArmor fix involving validation of DFA start-state bounds in unpack_pdb. The kernel-side patch context points to a defensive hardening change in AppArmor’s...

The Microsoft Security Response Center page for CVE-2026-23208 is not currently serving the actual advisory content, so the reliable technical detail has to come from the Linux kernel vulnerability record instead. According to NVD, CVE-2026-23208 affects the Linux kernel’s ALSA usb-audio path...

The Microsoft Security Response Center page for CVE-2026-23169 is unavailable, but the title itself tells a clear story: this is a Linux kernel MPTCP fix, not a Windows product flaw, and the issue centers on a race in mptcp_pm_nl_flush_addrs_doit(). The available evidence points to a concurrency...

CVE-2026-23221 is another reminder that small-looking kernel bugs can have large security consequences: Microsoft’s update guide entry appears to have been removed or is temporarily unavailable, but the vulnerability title itself points to a use-after-free in the Linux fsl-mc bus code...

The wording of the CVE title suggests a Linux btrfs fix that hardens transaction handling when a filesystem has already been forced into a fully read-only state, but the Microsoft Security Update Guide page you linked is not currently available. Based on the kernel documentation, btrfs supports...

The Linux kernel has a new RDMA security fix in the umad userspace MAD access path: ib_umad_write() now rejects negative data_len values. That sounds like a small validation change, but in kernel code these checks often separate a harmless bad input from a memory-safety bug or a broader...

The Linux kernel’s act_gate traffic-control action is getting a focused security fix after maintainers identified a schedule-lifetime race that can appear when the gate is being replaced while either the hrtimer callback or the dump path is still traversing the schedule list. The upstream patch...

The Linux kernel's netfilter subsystem has a new, high-consequence memory-corruption fix that any Linux systems team running nftables must treat as urgent: CVE-2026-23231 patches a race-triggered use-after-free in nf_tables_addchain() that can leave published chain objects accessible to active...

The short answer is: No — Azure Linux is not necessarily the only Microsoft product that could include the vulnerable nf_tables code, but it is the only Microsoft product Microsoft has publicly attested so far as carrying that upstream component. Microsoft’s advisory is a product-level inventory...

A carefully scoped upstream fix for a Linux kernel memory-allocation bug—tracked as CVE-2024-39474—has rekindled an operational question many administrators ask when a vendor publishes a product-scoped vulnerability attestation: when Microsoft says “Azure Linux includes this open‑source library...

Microsoft’s one-line MSRC attestation that “Azure Linux includes this open‑source library and is therefore potentially affected” is accurate as a product-level inventory statement — but it is not a technical guarantee that no other Microsoft product can contain the same vulnerable NFS server...

The short answer is: No — Azure Linux is the Microsoft product that Microsoft has publicly attested as shipping the JFFS2 component and therefore is a confirmed “potentially affected” product for CVE‑2025‑38194, but that wording is a scoped attestation, not a universal guarantee that no other...

A simple missing NULL check inside a Linux kernel serial driver has been assigned CVE-2025-38135 — a low-level bug that can trigger a kernel-level null pointer dereference and, in the worst cases, a denial-of-service crash on affected systems. The fix is straightforward: check the return value...

The Linux kernel patch for CVE-2025-38204 closes an array-index-out-of-bounds read in the JFS filesystem implementation’s add_missing_indices routine — a correctness fix that prevents a malformed on-disk structure from producing an out-of-bounds read and a potential kernel crash. Microsoft’s...

Microsoft’s brief MSRC note that “Azure Linux includes this open‑source library and is therefore potentially affected” is accurate — but it is a product‑scoped inventory attestation, not a technical guarantee that no other Microsoft product can include the same vulnerable Linux kernel driver...

Microsoft’s short answer — that “Azure Linux includes this open‑source library and is therefore potentially affected” — is accurate as a product-level attestation, but it is not a technical guarantee that only Azure Linux can include the vulnerable drm/i915/gem code; any Microsoft artifact that...