net: airoha: Do not read uninitialized fragment address in airoha_dev_xmit()
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.
CVE-2026-63857
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-63857
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "23020f04932701d5c8363e60756f12b43b8ed752",
"lessThan": "dba5f4959653e4c212beb746594952e8645d1115",
"versionType": "git"
},
{
"status": "affected",
"version": "23020f04932701d5c8363e60756f12b43b8ed752",
"lessThan": "f670fa4b19ceddc6d215dda4997888ccba9bbc61",
"versionType": "git"
},
{
"status": "affected",
"version": "23020f04932701d5c8363e60756f12b43b8ed752",
"lessThan": "d78c8ab7bd84952e053d0c622b7fc1b4ad8a19a3",
"versionType": "git"
},
{
"status": "affected",
"version": "23020f04932701d5c8363e60756f12b43b8ed752",
"lessThan": "bde34e84edc8b5571fbde7e941e175a4293ee1eb",
"versionType": "git"
}
],
"programFiles": [
"drivers/net/ethernet/airoha/airoha_eth.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "6.11"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "6.11",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.12.114",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.33",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.0.10",
"versionType": "semver",
"lessThanOrEqual": "7.0.*"
},
{
"status": "unaffected",
"version": "7.1",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/net/ethernet/airoha/airoha_eth.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-63857
Source reference:
/cveMetadata/cveId
Publisher severity
critical
Source reference: /containers/cna/metrics
- Event
- #46403 · Revision 1
- Added to Heist Feed
- Publisher date