firewire: net: Fix fragmented datagram reassembly
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.
CVE-2026-68354
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-2026-68354
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": "c76acec6d55107b652a37c90b36c00bc8b04dabb",
"lessThan": "1aaf16031d65ccd4576451a79f7dabbec994c111",
"versionType": "git"
},
{
"status": "affected",
"version": "c76acec6d55107b652a37c90b36c00bc8b04dabb",
"lessThan": "0a219b2a01b4fe93706717e3bcacf7f62967b26f",
"versionType": "git"
},
{
"status": "affected",
"version": "c76acec6d55107b652a37c90b36c00bc8b04dabb",
"lessThan": "268cea3800eda5fa3ee04a49ee2973b8766a8df3",
"versionType": "git"
},
{
"status": "affected",
"version": "c76acec6d55107b652a37c90b36c00bc8b04dabb",
"lessThan": "b7d633c7c92321be98724b1d365e8ce507f2f349",
"versionType": "git"
},
{
"status": "affected",
"version": "c76acec6d55107b652a37c90b36c00bc8b04dabb",
"lessThan": "22e05b8ddbcf7d22c7f1598786e86635547e554d",
"versionType": "git"
},
{
"status": "affected",
"version": "c76acec6d55107b652a37c90b36c00bc8b04dabb",
"lessThan": "0177e578d7a885037b0fb82286c12e9d0360cc10",
"versionType": "git"
},
{
"status": "affected",
"version": "c76acec6d55107b652a37c90b36c00bc8b04dabb",
"lessThan": "2a5aa4e9b89227d1a1690fb8d5b81e5f3b261999",
"versionType": "git"
},
{
"status": "affected",
"version": "c76acec6d55107b652a37c90b36c00bc8b04dabb",
"lessThan": "d52a13adbb8ccbab99cd3bad36804e87d8b5c052",
"versionType": "git"
}
],
"programFiles": [
"drivers/firewire/net.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "2.6.31"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "2.6.31",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.10.265",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.216",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.183",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.148",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.101",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.42",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.1.6",
"versionType": "semver",
"lessThanOrEqual": "7.1.*"
},
{
"status": "unaffected",
"version": "7.2",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/firewire/net.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-68354
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #41705 · Revision 1
- Added to Heist Feed
- Publisher date