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CVE-2024-43854 is an uninitialized-memory disclosure vulnerability in the Linux kernel block-layer integrity-buffer handling. Metadata created by bio_integrity_prep for write operations was allocated with kmalloc without zero initialization, allowing residual kernel memory to be written to storage media. Protection Information metadata exposure is limited to an application tag not used by kernel-generated metadata, whereas non-Protection Information metadata can expose the entire integrity buffer.
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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.
13 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
Linux kernel block-layer integrity buffer initialization flaw that could write uninitialized data to media.
A Linux kernel information-disclosure vulnerability in block-layer integrity metadata handling. Uninitialized kernel memory could be written to storage media, with full-buffer kernel-memory leakage possible for non-PI metadata.
Linux kernel block-layer integrity-buffer issue addressed by zero-initializing the buffer before it is written to media.
Linux kernel block-layer issue involving integrity-buffer initialization before writing data to media.
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.