RDMA/erdma: Hold QP references for AE and CM processing
CVE-2026-90308 · 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-2026-90308?
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: 155055771704f8cbb5c176a4309b7dc30a50450c to < 233f1b7fe2980e4e238fe03dd3ceddfd082cb4c8, 155055771704f8cbb5c176a4309b7dc30a50450c to < 6e32f84b63c054e09392153125d7202abab2d14b, 155055771704f8cbb5c176a4309b7dc30a50450c to < ec987c0654651036dad6a42f7fa2a6d7c16a3687, 155055771704f8cbb5c176a4309b7dc30a50450c to < c92686867638cda954fdb2bdbac8a75e3aa6eaae
- Linux Linux: 6.0
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:
RDMA/erdma: Hold QP references for AE and CM processing
AE QP fatal events and iWARP CM paths load QPs from dev->qp_xa
and then use or reference them outside the xarray lock.
erdma_destroy_qp() can drop the destroy-path reference and free QP
resources while such a lookup is in flight.
Add erdma_qp_get_by_qpn() to acquire a kref under the xarray
lock with kref_get_unless_zero(). Remove the QP from the xarray
before dropping the destroy-path reference so no new lookup can acquire
it while destruction waits for existing users.
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/233f1b7fe2980e4e238fe03dd3ceddfd082cb4c8
- git.kernel.org/stable/c/6e32f84b63c054e09392153125d7202abab2d14b
- git.kernel.org/stable/c/ec987c0654651036dad6a42f7fa2a6d7c16a3687
- git.kernel.org/stable/c/c92686867638cda954fdb2bdbac8a75e3aa6eaae
- git.kernel.org/stable/c/a52eeff32024f190b3bdc99088c7becccd4fa60b
Merged from CVE List. Last updated 26 Oct 2026. All vulnerabilities · RSS · JSON