{"id":"CVE-2026-63857","title":"net: airoha: Do not read uninitialized fragment address in airoha_dev_xmit()","summary":"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 …","severity":"critical","cvss":9.8,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","cvssSource":"cna","vendor":"Linux","product":"Linux","affected":["Linux >= 23020f04932701d5c8363e60756f12b43b8ed752 < dba5f4959653e4c212beb746594952e8645d1115","Linux >= 23020f04932701d5c8363e60756f12b43b8ed752 < f670fa4b19ceddc6d215dda4997888ccba9bbc61","Linux >= 23020f04932701d5c8363e60756f12b43b8ed752 < d78c8ab7bd84952e053d0c622b7fc1b4ad8a19a3","Linux >= 23020f04932701d5c8363e60756f12b43b8ed752 < bde34e84edc8b5571fbde7e941e175a4293ee1eb","Linux 6.11"],"published":"2026-07-19","updated":"2026-10-21","sourceUpdated":"2026-10-21T12:42:41.508Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-63857","references":[{"url":"https://git.kernel.org/stable/c/dba5f4959653e4c212beb746594952e8645d1115"},{"url":"https://git.kernel.org/stable/c/f670fa4b19ceddc6d215dda4997888ccba9bbc61"},{"url":"https://git.kernel.org/stable/c/d78c8ab7bd84952e053d0c622b7fc1b4ad8a19a3"},{"url":"https://git.kernel.org/stable/c/bde34e84edc8b5571fbde7e941e175a4293ee1eb"}],"tags":["cve.org"],"epss":0.00649,"epssPercentile":0.50212,"ingestedAt":"2026-10-21T12:48:53.614Z","slug":"CVE-2026-63857","body":"## Overview\n\nIn 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)->nr_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.\n\n## Affected\n\n- `Linux >= 23020f04932701d5c8363e60756f12b43b8ed752 < dba5f4959653e4c212beb746594952e8645d1115`\n- `Linux >= 23020f04932701d5c8363e60756f12b43b8ed752 < f670fa4b19ceddc6d215dda4997888ccba9bbc61`\n- `Linux >= 23020f04932701d5c8363e60756f12b43b8ed752 < d78c8ab7bd84952e053d0c622b7fc1b4ad8a19a3`\n- `Linux >= 23020f04932701d5c8363e60756f12b43b8ed752 < bde34e84edc8b5571fbde7e941e175a4293ee1eb`\n- `Linux 6.11`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"midnight","depthScore":54,"depthScoreParts":{"impact":53.9,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}