net: airoha: Do not read uninitialized fragment address in airoha_dev_xmit()
CVE-2026-63857 · published 19 Jul 2026
How serious is it
- Severity: critical, CVSS score 9.8 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-2026-63857?
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: 23020f04932701d5c8363e60756f12b43b8ed752 to < dba5f4959653e4c212beb746594952e8645d1115, 23020f04932701d5c8363e60756f12b43b8ed752 to < f670fa4b19ceddc6d215dda4997888ccba9bbc61, 23020f04932701d5c8363e60756f12b43b8ed752 to < d78c8ab7bd84952e053d0c622b7fc1b4ad8a19a3, 23020f04932701d5c8363e60756f12b43b8ed752 to < bde34e84edc8b5571fbde7e941e175a4293ee1eb
- Linux Linux: 6.11
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:
net: airoha: Do not read uninitialized fragment address in airoha_dev_xmit()
The transmit loop in airoha_dev_xmit() reads fragment address and length
during its final iteration, when the loop index equals
skb_shinfo(skb)->nr_frags, at which point the fragment data is
uninitialized. While these values are never consumed, the read itself is
unsafe and may trigger a page fault. Fix this by avoiding the fragment
read on the last iteration.
Additionally, move the skb pointer from the first to the last used packet
descriptor, so that airoha_qdma_tx_napi_poll() defers freeing the skb
until the final descriptor is processed.
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/dba5f4959653e4c212beb746594952e8645d1115
- git.kernel.org/stable/c/f670fa4b19ceddc6d215dda4997888ccba9bbc61
- git.kernel.org/stable/c/d78c8ab7bd84952e053d0c622b7fc1b4ad8a19a3
- git.kernel.org/stable/c/bde34e84edc8b5571fbde7e941e175a4293ee1eb
Merged from CVE List. Last updated 25 Oct 2026. All vulnerabilities · RSS · JSON