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CVE-2026-68354— firewire: net: Fix fragmented datagram reassembly

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Linux kernel是美国Linux基金会开源的一个操作系统内核。 Linux kernel存在安全漏洞，该漏洞源于fwnet_frag_new()函数在合并相邻数据报碎片时未正确检查列表边缘和更新后的边界，可能导致两个相邻范围未合并，使fwnet_pd_is_complete()无法识别完整数据报。

CVSS 8.8 · High EPSS 0.29% · P20

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux c76acec6d55107b652a37c90b36c00bc8b04dabb< 1aaf16031d65ccd4576451a79f7dabbec994c111 affected
c76acec6d55107b652a37c90b36c00bc8b04dabb< 0a219b2a01b4fe93706717e3bcacf7f62967b26f affected
c76acec6d55107b652a37c90b36c00bc8b04dabb< 268cea3800eda5fa3ee04a49ee2973b8766a8df3 affected
c76acec6d55107b652a37c90b36c00bc8b04dabb< b7d633c7c92321be98724b1d365e8ce507f2f349 affected
c76acec6d55107b652a37c90b36c00bc8b04dabb< 22e05b8ddbcf7d22c7f1598786e86635547e554d affected
c76acec6d55107b652a37c90b36c00bc8b04dabb< 0177e578d7a885037b0fb82286c12e9d0360cc10 affected
c76acec6d55107b652a37c90b36c00bc8b04dabb< 2a5aa4e9b89227d1a1690fb8d5b81e5f3b261999 affected
c76acec6d55107b652a37c90b36c00bc8b04dabb< d52a13adbb8ccbab99cd3bad36804e87d8b5c052 affected
… +10 more rows
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I. Basic Information for CVE-2026-68354

Vulnerability Information
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Vulnerability Title
firewire: net: Fix fragmented datagram reassembly
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会开源的一个操作系统内核。 Linux kernel存在安全漏洞，该漏洞源于fwnet_frag_new()函数在合并相邻数据报碎片时未正确检查列表边缘和更新后的边界，可能导致两个相邻范围未合并，使fwnet_pd_is_complete()无法识别完整数据报。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux c76acec6d55107b652a37c90b36c00bc8b04dabb ~ 1aaf16031d65ccd4576451a79f7dabbec994c111 -
Linux Linux 2.6.31 -

II. Public POCs for CVE-2026-68354

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III. Intelligence Information for CVE-2026-68354

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Patches & Fixes for CVE-2026-68354 (8)

Same Patch Batch · Linux · 2026-08-10 · 344 CVEs total

CVE-2026-68159 9.8 CRITICAL libceph: bound pg_{temp,upmap,upmap_items} length to CEPH_PG_MAX_SIZE
CVE-2026-68300 9.8 CRITICAL sctp: auth: verify auth requirement when auth_chunk is NULL
CVE-2026-68388 9.8 CRITICAL smb/client: handle overlapping allocated ranges in fallocate
CVE-2026-68161 9.8 CRITICAL sctp: close UDP tunnel sockets during netns teardown
CVE-2026-68154 9.8 CRITICAL libceph: reject zero bucket types in crush_decode
CVE-2026-68136 9.8 CRITICAL net: gro: fix double aggregation of flush-marked skbs
CVE-2026-68137 9.8 CRITICAL net/x25: fix use-after-free in x25_kill_by_neigh()
CVE-2026-68117 9.8 CRITICAL tipc: clear sock->sk on the failed-insert path in tipc_sk_create()
CVE-2026-68385 9.8 CRITICAL s390/checksum: Fix csum_partial() without vector facility
CVE-2026-68160 9.8 CRITICAL ceph: fix pre-auth out-of-bounds read on snaptrace in ceph_handle_caps()
CVE-2026-68302 9.8 CRITICAL amt: re-read skb header pointers after every pull
CVE-2026-68156 9.8 CRITICAL libceph: refresh auth->authorizer_buf{,_len} after authorizer update
CVE-2026-68158 9.8 CRITICAL libceph: Fix multiplication overflow in decode_new_up_state_weight()
CVE-2026-68381 9.8 CRITICAL ksmbd: pin conn during async oplock break notification
CVE-2026-68127 9.8 CRITICAL ila: reload IPv6 header after pskb_may_pull in checksum adjust
CVE-2026-68144 9.8 CRITICAL phonet: pep: fix use-after-free in pep_get_sb()
CVE-2026-68426 9.8 CRITICAL xfrm: fix stale skb->prev after async crypto steals a GSO segment
CVE-2026-68170 9.8 CRITICAL mptcp: fix stale skb->sk reference on subflow close
CVE-2026-68123 9.8 CRITICAL openvswitch: fix GSO userspace truncation underflow
CVE-2026-68124 9.6 CRITICAL mctp: serial: handle zero-length frames to prevent rx buffer overflow

Showing top 20 of 344 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-68354

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