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CVE-2026-72351— gue: validate REMCSUM private option length

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 3.19版本存在安全漏洞，该漏洞源于GUE私有选项长度验证不足，未正确计算REMCSUM私有选项长度，可能导致畸形数据包通过验证并读取越界数据。

CVSS 9.8 · Critical EPSS 0.76% · P52

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux c1aa8347e73e4092411fbd96cc59531fb7e76d04< 158b9995d3c87f3b93f5c22df54a12e12a3438b3 affected
c1aa8347e73e4092411fbd96cc59531fb7e76d04< 7c6876ec1b227261b51803f784c7be1b2242a1a0 affected
c1aa8347e73e4092411fbd96cc59531fb7e76d04< 2c4de9988e9ddc760b750d6b6e701c35ff60ad14 affected
c1aa8347e73e4092411fbd96cc59531fb7e76d04< 2a99224c120823987e4d829726f4ecb33e03fc1e affected
c1aa8347e73e4092411fbd96cc59531fb7e76d04< 61e78679c7c9ca685bff58e4b6348304dc60aafd affected
c1aa8347e73e4092411fbd96cc59531fb7e76d04< 4a4a1d41c6e901e773bcf795f562a47fa71f692a affected
c1aa8347e73e4092411fbd96cc59531fb7e76d04< f618cbe9b24cd0202004d2db781d5f80ab77037f affected
c1aa8347e73e4092411fbd96cc59531fb7e76d04< d335dcc6f521571d57117b8deeebc940836e5450 affected
… +10 more rows
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I. Basic Information for CVE-2026-72351

Vulnerability Information
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Vulnerability Title
gue: validate REMCSUM private option length
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: gue: validate REMCSUM private option length GUE private flags can indicate that remote checksum offload metadata is present. The private flags field itself is accounted for by guehdr_flags_len(), but guehdr_priv_flags_len() currently returns 0 even when GUE_PFLAG_REMCSUM is set. This lets a packet with only the private flags field pass validate_gue_flags(), after which gue_remcsum() and gue_gro_remcsum() read the missing REMCSUM start/offset fields from the following bytes. Account for GUE_PLEN_REMCSUM when GUE_PFLAG_REMCSUM is present so that malformed packets are rejected during option validation.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/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 3.19版本存在安全漏洞，该漏洞源于GUE私有选项长度验证不足，未正确计算REMCSUM私有选项长度，可能导致畸形数据包通过验证并读取越界数据。
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 c1aa8347e73e4092411fbd96cc59531fb7e76d04 ~ 158b9995d3c87f3b93f5c22df54a12e12a3438b3 -
Linux Linux 3.19 -

II. Public POCs for CVE-2026-72351

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III. Intelligence Information for CVE-2026-72351

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Patches & Fixes for CVE-2026-72351 (7)

Same Patch Batch · Linux · 2026-08-15 · 845 CVEs total

CVE-2026-74280 10.0 CRITICAL crypto: marvell/octeontx - fix DMA cleanup using wrong loop index
CVE-2026-74309 10.0 CRITICAL vdpa/octeon_ep: fix IRQ-to-ring mapping in interrupt handler
CVE-2026-74279 10.0 CRITICAL crypto: cavium/cpt - fix DMA cleanup using wrong loop index
CVE-2026-74475 10.0 CRITICAL vxlan: use neigh_ha_snapshot() in route_shortcircuit()
CVE-2026-72407 10.0 CRITICAL geneve: validate inner network offset in geneve_gro_complete()
CVE-2026-72408 10.0 CRITICAL geneve: gate GRO hint in geneve_gro_complete() on gs->gro_hint
CVE-2026-72421 10.0 CRITICAL ipv4: fib: Don't ignore error route in local/main tables.
CVE-2026-72493 9.9 CRITICAL net: serialize netif_running() check in enqueue_to_backlog()
CVE-2026-72472 9.8 CRITICAL nfs: use nfsi->rwsem to protect traversal of the file lock list
CVE-2026-74428 9.8 CRITICAL rxrpc: Fix double unlock in rxrpc_recvmsg()
CVE-2026-72473 9.8 CRITICAL xprtrdma: Decouple req recycling from RPC completion
CVE-2026-74433 9.8 CRITICAL rxrpc: Fix UAF in rxgk_issue_challenge()
CVE-2026-72098 9.8 CRITICAL dm-verity: fix buffer overflow in FEC calculation
CVE-2026-74434 9.8 CRITICAL rxrpc: Don't move a peeked OOB message onto the pending queue
CVE-2026-72299 9.8 CRITICAL tipc: restrict socket queue dumps in enqueue tracepoints
CVE-2026-72477 9.8 CRITICAL fs/ntfs3: call _ntfs_bad_inode() when failing to rename
CVE-2026-72249 9.8 CRITICAL netfilter: flowtable: use dst in this direction when pushing IPIP header
CVE-2026-72251 9.8 CRITICAL netfilter: nf_nat_sip: reload possible stale data pointer
CVE-2026-72130 9.8 CRITICAL nvmet-auth: reject short AUTH_RECEIVE buffers
CVE-2026-72248 9.8 CRITICAL netfilter: flowtable: support IPIP tunnel with direct xmit

Showing top 20 of 845 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

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