svcrdma: Reject Read lists that exceed the page budget
CVE-2026-89528 · published 11 Sept 2026
How serious is it
- Severity: high, CVSS score 7.5 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-2026-89528?
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: 026d958b38c628a1b4ced534808945365e2747a5 to < beb4e9801f6362436102acc4cc5304b7324f9365, 026d958b38c628a1b4ced534808945365e2747a5 to < e70fdb121171c3eb0ac34eb545721828cd737717, 026d958b38c628a1b4ced534808945365e2747a5 to < 1a3af2262cb384112ef38632de4690682be528b4, 026d958b38c628a1b4ced534808945365e2747a5 to < 465f511f59a0fa7a80d5d1073c4b24f28ea38f58
- Linux Linux: 4.13
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:
svcrdma: Reject Read lists that exceed the page budget
Individual Read segment lengths are validated at decode time, but
nothing prevents a requester from sending multiple segments whose
cumulative length exceeds the rq_pages array budget. When one
segment fills the page array exactly, the runtime guard in
svc_rdma_build_read_segment() is bypassed because len reaches zero.
A subsequent segment then accesses the NULL sentinel slot at
rq_pages[rq_maxpages], resulting in a NULL pointer dereference during
DMA mapping.
Accumulate pages across all Read segments and reject the message at
decode time when the total would overflow the page budget.
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/beb4e9801f6362436102acc4cc5304b7324f9365
- git.kernel.org/stable/c/e70fdb121171c3eb0ac34eb545721828cd737717
- git.kernel.org/stable/c/1a3af2262cb384112ef38632de4690682be528b4
- git.kernel.org/stable/c/465f511f59a0fa7a80d5d1073c4b24f28ea38f58
- git.kernel.org/stable/c/0ca487abb3bdf581851664b5db21f364caf57682
Merged from CVE List. Last updated 26 Oct 2026. All vulnerabilities · RSS · JSON