bpf: Reject writes through untrusted BTF pointers
CVE-2026-93144 · 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-2026-93144?
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: 282de143ead96a5d53331e946f31c977b4610a74 to < 56f92fecd80419567288b7972caa90107033836e, 282de143ead96a5d53331e946f31c977b4610a74 to < c4dc883447ae38c4e22a29cc016046fa65d88994, 282de143ead96a5d53331e946f31c977b4610a74 to < 644cf4e77c2770d4246f6d12f99bc80d253b0ec6, 282de143ead96a5d53331e946f31c977b4610a74 to < 19d5566b84ca1af0256d0d0003e1a081580c3ba3
- Linux Linux: 6.2
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:
bpf: Reject writes through untrusted BTF pointers
check_ptr_to_btf_access() lets program-type btf_struct_access callbacks
validate writes before the default BTF access path rejects non-read
accesses. That bypasses the read-only policy for untrusted BTF pointers
created by helpers such as bpf_rdonly_cast().
Reject non-read accesses through PTR_UNTRUSTED BTF pointers at the
common entry point, before the callback branch to handle all cases.
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/56f92fecd80419567288b7972caa90107033836e
- git.kernel.org/stable/c/c4dc883447ae38c4e22a29cc016046fa65d88994
- git.kernel.org/stable/c/644cf4e77c2770d4246f6d12f99bc80d253b0ec6
- git.kernel.org/stable/c/19d5566b84ca1af0256d0d0003e1a081580c3ba3
- git.kernel.org/stable/c/ac65c710cc643cbc52b899627577357867249530
Merged from CVE List. Last updated 26 Oct 2026. All vulnerabilities · RSS · JSON