linux kernel

The Linux kernel has a new security issue on the radar, and this one is a reminder that even highly specialized storage and virtualization paths can leak sensitive state when a single bounds check is missed. CVE-2026-31464 affects the ibmvfc SCSI driver, where a malicious or compromised VIO...

Background CVE-2026-31474 is a Linux kernel use-after-free in the CAN ISO-TP path, specifically in isotp_sendmsg, where the transmit buffer can be freed too early while the sender is still consuming it for the final CAN frame. The kernel record describes a race between isotp_sendmsg and...

In this article, I'll explain the significance of CVE-2026-23410, a Linux kernel AppArmor race condition that can turn into a use-after-free and, under the right circumstances, a serious denial-of-service or even broader compromise vector. The issue sits in a subtle corner of AppArmor’s...

The Linux kernel has another networking-focused security fix on its hands, and this one is a classic example of how a tiny input-validation oversight can escalate into a system-wide stability problem. CVE-2026-31420 affects the bridge MRP path, where a zero test interval supplied through netlink...

The Linux kernel has received a fresh netfilter fix under CVE-2026-31414, and although the NVD entry is still awaiting enrichment, the upstream remediation is already clear: nf_conntrack_expect now uses the expectation’s stored helper pointer instead of calling into nfct_help() in contexts where...

Overview A newly assigned Linux kernel CVE, CVE-2026-31421, highlights a small but very real class of bug that security teams have learned to take seriously: a NULL pointer dereference in the traffic control classifier path. The flaw sits in net/sched/cls_fw, the classic firewall-style...

CVE-2026-31419 is a good example of how a kernel bug can look deceptively narrow while still carrying real operational weight. The flaw sits in the Linux bonding driver’s broadcast transmit path, where the code reused the original skb for the “last” slave and cloned it for the others. Under...

CVE-2026-31427 is a small-looking Linux kernel bug with an outsized lesson: a stack variable meant to carry RTP address state can remain uninitialized, then get handed to the SIP NAT helper and used to rewrite SDP fields with whatever happens to be in memory. In the common case where stack...

CVE-2026-31424 is a good example of the kind of Linux kernel vulnerability that looks narrow on paper but reveals a deeper subsystem design flaw once you unpack the mechanics. The issue affects the netfilter x_tables compatibility layer and centers on how xt_check_match and xt_check_target...

CVE-2026-31423 is a sharp reminder that kernel bugs do not need to be glamorous to matter. In this case, the Linux kernel’s sch_hfsc traffic scheduler could hit a divide-by-zero in rtsc_min() when an internal slope calculation produced a boundary-value result that was silently truncated to zero...

Linux kernel maintainers have assigned CVE-2026-31416 to a narrow but noteworthy bug in nfnetlink_log, the netfilter logging path that formats messages for userspace. The issue is not a classic memory-corruption headline; instead, it is a correctness fix that ensures NLMSG_DONE accounts for the...

Microsoft’s refreshed DXGKRNL work for Linux is less a simple driver update than a revealing sign of how far Windows Subsystem for Linux has evolved, and how much harder it has become to keep GPU plumbing both useful and acceptable to the broader kernel community. The core idea is...

CVE-2026-23405 exposes a deceptively simple AppArmor flaw with potentially serious consequences: the Linux security module did not properly bound the number of levels in policy namespaces. In practical terms, that means a local attacker could potentially construct an excessively deep namespace...

When Microsoft’s update guide flags a Linux kernel issue like CVE-2026-31394, it is usually a sign that the bug is both specific and operationally important: not headline-grabbing on its own, but capable of taking down a system in a real deployment. This one sits in mac80211, the Linux wireless...

Linux’s Bluetooth stack has a fresh use-after-free flaw, tracked as CVE-2026-31408, and the issue sits in one of the trickier parts of kernel networking: the SCO path that handles synchronous audio traffic. The bug arises in sco_recv_frame(), where the code reads conn->sk while holding...

CVE-2026-23442 is a small-looking Linux kernel fix with the kind of operational consequences that make networking teams sit up and take notice. The vulnerability centers on IPv6 Segment Routing over IPv6 (SRv6) paths, where the kernel can end up dereferencing a NULL idev pointer if the device...

The emergence of CVE-2026-23473 highlights a subtle but important reliability flaw in Linux’s io_uring networking path, where a wakeup race can cause a multishot receive operation to miss a terminal EOF/HUP condition and wait forever. According to the published kernel description, the bug...

The Linux kernel’s Wi-Fi mesh stack has picked up another security-relevant crash fix, and this one is a reminder that optional protocol elements can be just as dangerous as the core packet parser. CVE-2026-23396 tracks a NULL pointer dereference in mac80211’s mesh_matches_local() routine, where...

The security issue behind CVE-2026-23374 appears to be a narrowly scoped Linux kernel bug in blktrace, where __this_cpu_read() and __this_cpu_write() were used in a context that could be preempted, creating a correctness and hardening problem rather than a flashy exploit primitive. The phrasing...

The Linux kernel is once again at the center of a subtle but important reliability fix, and this time the issue sits inside irqchip/sifive-plic, the interrupt-controller driver used on SiFive RISC-V platforms. The vulnerability, identified as CVE-2026-23287, is described as a frozen interrupt...