netfs: Fix missing locking around retry adding new subreqs
CVE-2026-64068 · published 19 Jul 2026
How serious is it
- Severity: critical, CVSS score 9.8 out of 10.
- No exploit prediction (EPSS) score yet.
- Not on the CISA list of exploited vulnerabilities.
- No public exploit in Exploit-DB.
Is your app affected by CVE-2026-64068?
Paste this prompt into Claude Code, Cursor or any AI coding tool: it runs a free Shippable scan of your project and fixes what it finds. Built with Lovable, Bolt or v0? Scan your live app. Or upload your package file.
Who is affected
- Linux Linux: 288ace2f57c9d06dd2e42bd80d03747d879a4068 to < f59c4ec86ef3a9ac99706ae163a38ec28129fd76, 288ace2f57c9d06dd2e42bd80d03747d879a4068 to < d5c9d19b0ff2f7153532ac238a5e96fed2df315c, 288ace2f57c9d06dd2e42bd80d03747d879a4068 to < 393f3f0d7353a94b1e0bc4ca89c683fe983e5fd2, 288ace2f57c9d06dd2e42bd80d03747d879a4068 to < cce18c263e9623872327ba3c956012f73c1179cc
- Linux Linux: 6.10
How to check
- Find out whether you run the affected product and which version, then compare it with the versions above.
How to fix
Copies a prompt for Claude Code, Cursor or Codex that asks it to check whether you run this product.
- Apply the vendor's update or mitigation from the references below. If there is none yet, limit exposure of the affected service until there is.
- If a vulnerable version was live, check your logs and rotate the secrets that server could read.
The advisory
In the Linux kernel, the following vulnerability has been resolved:
netfs: Fix missing locking around retry adding new subreqs
Fix netfs_retry_read_subrequests() and netfs_retry_write_stream() to take
the appropriate lock when adding extra subrequests into
stream->subrequests.
Check your whole app
Dependencies are only half of it. Free and read-only: before you push, run npx shippable-dev scan localhost:3000 in your project folder, no account needed. For your live app, you prove it's yours with a one-line tag first.
References
- git.kernel.org/stable/c/f59c4ec86ef3a9ac99706ae163a38ec28129fd76
- git.kernel.org/stable/c/d5c9d19b0ff2f7153532ac238a5e96fed2df315c
- git.kernel.org/stable/c/393f3f0d7353a94b1e0bc4ca89c683fe983e5fd2
- git.kernel.org/stable/c/cce18c263e9623872327ba3c956012f73c1179cc
Merged from CVE List. Last updated 25 Oct 2026. All vulnerabilities · RSS · JSON