iommu/tegra241-cmdqv: Don't fall back to a freed smmu after devm_krealloc()
CVE-2026-90427 · published 17 Sept 2026
How serious is it
- Severity: high, CVSS score 7.4 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-2026-90427?
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: 918eb5c856f6ce4cf93b4b38e4b5e156905c5943 to < ea2edb27ef2648d8687cd0fc3ec3ba1793436e7e, 918eb5c856f6ce4cf93b4b38e4b5e156905c5943 to < 268cbe3a36ae57a2ec09601f343b92f6f092d505, 918eb5c856f6ce4cf93b4b38e4b5e156905c5943 to < 86197679b293f0601c3331d545f99a70a7780aa9, 918eb5c856f6ce4cf93b4b38e4b5e156905c5943 to < d4d05f55e9da646ec03adfa77260eb46f4163749
- Linux Linux: 6.12
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:
iommu/tegra241-cmdqv: Don't fall back to a freed smmu after devm_krealloc()
__tegra241_cmdqv_probe() uses devm_krealloc() to grow @smmu into the larger
tegra241_cmdqv, which frees the original @smmu once it relocates. A failure
after that returned NULL, and the caller then dereferenced the freed @smmu
on its fallback path.
Return an int and take @smmu by reference instead, then update *smmu to the
reallocated pointer after devm_krealloc() succeeds, so the caller and its
fallback path both use the live @smmu rather than the freed original.
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/ea2edb27ef2648d8687cd0fc3ec3ba1793436e7e
- git.kernel.org/stable/c/268cbe3a36ae57a2ec09601f343b92f6f092d505
- git.kernel.org/stable/c/86197679b293f0601c3331d545f99a70a7780aa9
- git.kernel.org/stable/c/d4d05f55e9da646ec03adfa77260eb46f4163749
Merged from CVE List. Last updated 26 Oct 2026. All vulnerabilities · RSS · JSON