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CVE-2026-22990 is a denial-of-service vulnerability in the Linux kernel's libceph component, specifically in osdmap_apply_incremental(). The vulnerable code used an overzealous BUG_ON assertion when processing an incremental Ceph OSD map. If an OSD map is maliciously corrupted such that the incremental OSD map epoch differs from the expected value, the kernel could hit BUG_ON instead of safely rejecting the malformed input. The fix changes this behavior to treat the incremental OSD map as invalid rather than triggering a kernel BUG.
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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.
8 sources tracked across advisories and community write-ups. News coverage will land here when it surfaces.
No news coverage yet. Advisories and community discussion only.
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.