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CVE PROGRAM SOURCE RECORD8.8 High

CVE-2026-68354

firewire: net: Fix fragmented datagram reassembly

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Status
Published
Published
Updated
Assigning organization
Linux

Description

In the Linux kernel, the following vulnerability has been resolved: firewire: net: Fix fragmented datagram reassembly fwnet_frag_new() keeps a sorted list of received fragments for a partial datagram. When a new fragment is adjacent to an existing fragment, the code checks whether the new fragment also closes the gap to the next or previous list entry. Those neighbor lookups currently assume that the current fragment always has a real next or previous fragment. At a list edge, the next or previous entry is the list head, not a struct fwnet_fragment_info. The gap checks also compare against the old edge of the current fragment instead of the edge after adding the new fragment. As a result, a fragment that bridges two existing ranges may leave two adjacent ranges unmerged, so fwnet_pd_is_complete() can miss a complete datagram. Check for the list head before looking up the neighboring fragment, and compare the neighbor against the new fragment's far edge when deciding whether to merge all three ranges. This issue was found by a static analysis checker and confirmed by manual source review.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Linux Linux

Default version status: unaffected

  • c76acec6d55107b652a37c90b36c00bc8b04dabb to < 1aaf16031d65ccd4576451a79f7dabbec994c111affected
  • c76acec6d55107b652a37c90b36c00bc8b04dabb to < 0a219b2a01b4fe93706717e3bcacf7f62967b26faffected
  • c76acec6d55107b652a37c90b36c00bc8b04dabb to < 268cea3800eda5fa3ee04a49ee2973b8766a8df3affected
  • c76acec6d55107b652a37c90b36c00bc8b04dabb to < b7d633c7c92321be98724b1d365e8ce507f2f349affected
  • c76acec6d55107b652a37c90b36c00bc8b04dabb to < 22e05b8ddbcf7d22c7f1598786e86635547e554daffected
  • c76acec6d55107b652a37c90b36c00bc8b04dabb to < 0177e578d7a885037b0fb82286c12e9d0360cc10affected
  • c76acec6d55107b652a37c90b36c00bc8b04dabb to < 2a5aa4e9b89227d1a1690fb8d5b81e5f3b261999affected
  • c76acec6d55107b652a37c90b36c00bc8b04dabb to < d52a13adbb8ccbab99cd3bad36804e87d8b5c052affected

Linux Linux

Default version status: affected

  • 2.6.31affected
  • 0 to < 2.6.31unaffected
  • 5.10.265 to ≤ 5.10.*unaffected
  • 5.15.216 to ≤ 5.15.*unaffected
  • 6.1.183 to ≤ 6.1.*unaffected
  • 6.6.148 to ≤ 6.6.*unaffected
  • 6.12.101 to ≤ 6.12.*unaffected
  • 6.18.42 to ≤ 6.18.*unaffected
  • 7.1.6 to ≤ 7.1.*unaffected
  • 7.2 to ≤ *unaffected

References