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CVE-2026-22990 is a denial-of-service vulnerability in the Linux kernel's libceph component. The flaw is in osdmap_apply_incremental(), where an overzealous BUG_ON assertion is reached if a processed incremental OSD map contains an epoch value different from what the code expects. A maliciously corrupted OSD map can therefore trigger a kernel BUG instead of being handled as invalid input. The fix changes this behavior so that the malformed incremental OSD map is rejected as invalid rather than causing the kernel to BUG.
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A Linux kernel libceph vulnerability in osdmap_apply_incremental() related to an overzealous BUG_ON condition.
Linux kernel libceph vulnerability in osdmap_apply_incremental() involving an overzealous BUG_ON condition.
A Linux kernel libceph vulnerability in osdmap_apply_incremental() related to an overzealous BUG_ON condition.
A Linux kernel libceph vulnerability in osdmap_apply_incremental() involving an overzealous BUG_ON condition.
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.
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Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.