{"id":"CVE-2026-53363","title":"In the Linux kernel, the following vulnerability has been resolved:\n\nxfrm: iptfs: preserve shared-frag marker in iptfs_consume_frags()\n\niptfs_consume_frags() transfers paged fragments from one socket buffer\nto another but fails to propag…","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nxfrm: iptfs: preserve shared-frag marker in iptfs_consume_frags()\n\niptfs_consume_frags() transfers paged fragments from one socket buffer\nto another but fails to propag…","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","published":"2026-07-10","updated":"2026-07-18","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-53363","references":[{"url":"https://git.kernel.org/stable/c/c885d111ed9f5a0a1f3cc4e87a50db6518abaa6c","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/dd66f7f6e360ee82cd905517726f8e9091265de5","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/e9096a5a170e7ecd6467bc2e08668ec39897cda7","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"tags":["nvd"],"epss":0.00411,"epssPercentile":0.35025,"ingestedAt":"2026-07-18T13:23:33.322Z","slug":"CVE-2026-53363","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nxfrm: iptfs: preserve shared-frag marker in iptfs_consume_frags()\n\niptfs_consume_frags() transfers paged fragments from one socket buffer\nto another but fails to propagate the SKBFL_SHARED_FRAG flag. This is\nthe same class of bug that was fixed in skb_try_coalesce() for\nCVE-2026-46300: when fragments backed by read-only page-cache pages are\nmerged, the marker indicating their shared nature must be preserved so\nthat ESP can decide correctly whether in-place encryption is safe.\n\nApply the same two-line fix used in skb_try_coalesce() to\niptfs_consume_frags().\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":[]}