GHSA-93J7-Q4PR-7PMF
Vulnerability from github – Published: 2026-07-19 15:30 – Updated: 2026-07-20 15:31In 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.
{
"affected": [],
"aliases": [
"CVE-2026-63857"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-07-19T15:16:52Z",
"severity": "CRITICAL"
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: airoha: Do not read uninitialized fragment address in airoha_dev_xmit()\n\nThe transmit loop in airoha_dev_xmit() reads fragment address and length\nduring its final iteration, when the loop index equals\nskb_shinfo(skb)-\u003enr_frags, at which point the fragment data is\nuninitialized. While these values are never consumed, the read itself is\nunsafe and may trigger a page fault. Fix this by avoiding the fragment\nread on the last iteration.\nAdditionally, move the skb pointer from the first to the last used packet\ndescriptor, so that airoha_qdma_tx_napi_poll() defers freeing the skb\nuntil the final descriptor is processed.",
"id": "GHSA-93j7-q4pr-7pmf",
"modified": "2026-07-20T15:31:48Z",
"published": "2026-07-19T15:30:27Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-63857"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/bde34e84edc8b5571fbde7e941e175a4293ee1eb"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/d78c8ab7bd84952e053d0c622b7fc1b4ad8a19a3"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/f670fa4b19ceddc6d215dda4997888ccba9bbc61"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
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