---
id: "CVE-2026-98902"
kind: "vulnerability"
aliases: ["CVE-2026-98902"]
title: "Linux kernel md/raid5: stripe batch sequence comparison breaks after wraparound"
severity: "unknown"
cvss: null
epss: null
exploited: false
status: "open"
category: "infrastructure"
products: []
ecosystems: []
tags: ["infrastructure", "kernel", "linux", "md-raid", "raid5"]
not_affected_if: []
published_at: "2026-10-23T12:18:24+00:00"
first_seen_at: "2026-10-23T21:57:33+00:00"
updated_at: "2026-10-25T04:59:51+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-98902", "first_seen_at": "2026-10-23T21:57:33+00:00"}]
---

# Linux kernel md/raid5: stripe batch sequence comparison breaks after wraparound

In the Linux kernel's RAID5 driver (md/raid5), comparing a 32-bit bitmap sequence number fails once it wraps around, because a newer value can look smaller than an older one. The sources do not describe a confirmed attacker outcome.

_Summary, check and fix written by a model from the sources; labelled as such._

## Timeline

- 2026-10-23T21:57:33+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-98902

## From the sources

In the Linux kernel, the following vulnerability has been resolved:

md/raid5: let stripe batch bm_seq comparison wrap-safe

Once the 32-bit seq wraps, a newer bm_seq can look smaller
than old, so .. covert to wrap-safe calculate way.

---

_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_