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CVE-2022-24448 is an information-disclosure vulnerability in the Linux kernel NFS client implementation before version 5.16.5. In nfs_atomic_open(), an application that supplies O_DIRECTORY while opening a regular file on a mounted NFS filesystem can trigger a lookup path in which a server response identifying a regular file is handled incorrectly. Rather than returning ENOTDIR, the kernel returns a file descriptor containing uninitialized data, potentially exposing kernel memory to userspace.
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What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
What an attacker gets, and what they’ve been doing with it.
If you can’t patch tonight, do this now.
Patch, then assume compromise.
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
7 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
Linux kernel NFS flaw where nfs_atomic_open() can return uninitialized data.
Linux kernel NFS issue in which nfs_atomic_open() returns uninitialized data rather than ENOTDIR.
Linux kernel NFS vulnerability that can expose uninitialized data through nfs_atomic_open().
Linux kernel NFS issue in which nfs_atomic_open() can return uninitialized data rather than ENOTDIR.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.