ublk: check import_ubuf() return value
CVE-2026-90324 · published 17 Sept 2026
How serious is it
- Severity: high, CVSS score 7.8 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-2026-90324?
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: 981f95a571e3ca20a496c0b77dbf6b06039c6648 to < 7f97c762b5f6e0005c5c7d040ded73bf7fb3587e, 981f95a571e3ca20a496c0b77dbf6b06039c6648 to < 27ff6e8703f7a7160c728501da2f8ef8e7bb6b2f, 981f95a571e3ca20a496c0b77dbf6b06039c6648 to < 0121c84adb6a4cd6f7560b5895bd88f9899bbc1f, 981f95a571e3ca20a496c0b77dbf6b06039c6648 to < 5ac6019cb78e98c9608fda72726b36ddf8474dd7
- Linux Linux: 6.5
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:
ublk: check import_ubuf() return value
import_ubuf() can fail if the address range (provided by the userspace
ublk server) is outside the allowed user address space. Return that 0
bytes were copied if import_ubuf() fails rather than passing an
uninitialized struct iov_iter to ublk_copy_user_pages().
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/7f97c762b5f6e0005c5c7d040ded73bf7fb3587e
- git.kernel.org/stable/c/27ff6e8703f7a7160c728501da2f8ef8e7bb6b2f
- git.kernel.org/stable/c/0121c84adb6a4cd6f7560b5895bd88f9899bbc1f
- git.kernel.org/stable/c/5ac6019cb78e98c9608fda72726b36ddf8474dd7
- git.kernel.org/stable/c/3831568792af75b6523fa93bb91560e29189cf55
Merged from CVE List. Last updated 26 Oct 2026. All vulnerabilities · RSS · JSON