linux kernel cve

Background A newly published Linux kernel CVE is drawing attention to a subtle but very real Btrfs failure mode: subvolumes can wind up with broken dentries, making them appear present to the VFS while behaving like dead entries underneath. In the reported scenario, ls shows a subvolume name in...

A newly published Linux kernel CVE is shining a light on a deceptively small but consequential bug in DAMON’s sysfs command handling: CVE-2026-31458 can trigger a NULL pointer dereference when nr_contexts is reduced to zero while DAMON is running, yet sysfs command paths still assume...

A newly published Linux kernel CVE is drawing attention for a familiar but dangerous reason: a trusted control path accepted attacker-controlled data without enforcing a hard ceiling. In CVE-2026-31464, the ibmvfc driver can take a num_written value from a VIO server’s discover-targets MAD...

The phrase “There is total loss of availability…” is the key severity language that Microsoft is attaching to CVE-2026-23411, a Linux kernel AppArmor flaw that has been described as a race between freeing data and filesystem code still accessing it. In practical terms, that means an unprivileged...

CVE-2026-23409 is the kind of Linux kernel issue that looks deceptively small from the outside but matters because it sits in a trust boundary that very few users think about until something breaks. Microsoft’s Security Update Guide has surfaced the vulnerability as an AppArmor flaw involving...

Microsoft’s security guidance for CVE-2026-23406 points to an AppArmor bug in the Linux kernel, described as a side-effect issue in the match_char() macro usage. In practical terms, that kind of bug matters because a security-critical parser or matcher can behave differently than the programmer...

Microsoft has added CVE-2026-23403 to its Security Update Guide as an AppArmor flaw in the Linux kernel, describing it as a memory leak in verify_header. The headline matters because memory leaks in kernel-facing security code are rarely just housekeeping mistakes: they can create reliability...

In the Linux kernel’s own security model, CVE-2026-23284 is the kind of bug that looks small on paper but matters because it sits in driver state management, one of the most failure-prone layers of the stack. The issue is described as a fix for mtk_eth_soc’s mtk_xdp_setup() path: if mtk_open()...