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CVE-2026-68476— ipvs: reload ip header after head reallocation

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__ip_vs_get_out_rt()调用skb_ensure_writable()时可能重新分配skb->head，导致IP头部未及时重新加载。

CVSS 9.8 · Critical EPSS 0.71% · P53

Possible ATT&CK Techniques 1 AI

T1498 · Network Denial of Service

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux 8d8e20e2d7bba8c50e64e0eca1cb83956f468e49< 4f2d1151421520d7ae16ca8d367d0ca09f5dfbd7 affected
8d8e20e2d7bba8c50e64e0eca1cb83956f468e49< 657118cad620172dfd8f6ed5717fd75c0d1f7a5a affected
8d8e20e2d7bba8c50e64e0eca1cb83956f468e49< a10f5080afbed242640f2984328de25f84557da1 affected
8d8e20e2d7bba8c50e64e0eca1cb83956f468e49< ac6ac3d35bfc0ade9d17d354c84e503a946ebdab affected
8d8e20e2d7bba8c50e64e0eca1cb83956f468e49< e51687fc56c2e39ea6e9532925f1aabd4d529f61 affected
8d8e20e2d7bba8c50e64e0eca1cb83956f468e49< 3fb7edd2018bb1ad0a68157383d9b9dac33dd645 affected
8d8e20e2d7bba8c50e64e0eca1cb83956f468e49< ad1e14710b360bda087ebf9fb82460eb5ef775de affected
8d8e20e2d7bba8c50e64e0eca1cb83956f468e49< a2f57827bf7c695b8c72dc4511cae8e86582369d affected
… +10 more rows
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I. Basic Information for CVE-2026-68476

Vulnerability Information
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Vulnerability Title
ipvs: reload ip header after head reallocation
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: ipvs: reload ip header after head reallocation __ip_vs_get_out_rt() calls skb_ensure_writable() which may reallocate skb->head.
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存在安全漏洞，该漏洞源于__ip_vs_get_out_rt()调用skb_ensure_writable()时可能重新分配skb->head，导致IP头部未及时重新加载。
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 8d8e20e2d7bba8c50e64e0eca1cb83956f468e49 ~ 4f2d1151421520d7ae16ca8d367d0ca09f5dfbd7 -
Linux Linux 4.10 -

II. Public POCs for CVE-2026-68476

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III. Intelligence Information for CVE-2026-68476

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Patches & Fixes for CVE-2026-68476 (6)

Same Patch Batch · Linux · 2026-08-15 · 844 CVEs total

CVE-2026-74280 10.0 CRITICAL crypto: marvell/octeontx - fix DMA cleanup using wrong loop index
CVE-2026-74475 10.0 CRITICAL vxlan: use neigh_ha_snapshot() in route_shortcircuit()
CVE-2026-74279 10.0 CRITICAL crypto: cavium/cpt - fix DMA cleanup using wrong loop index
CVE-2026-72421 10.0 CRITICAL ipv4: fib: Don't ignore error route in local/main tables.
CVE-2026-72408 10.0 CRITICAL geneve: gate GRO hint in geneve_gro_complete() on gs->gro_hint
CVE-2026-72407 10.0 CRITICAL geneve: validate inner network offset in geneve_gro_complete()
CVE-2026-74309 10.0 CRITICAL vdpa/octeon_ep: fix IRQ-to-ring mapping in interrupt handler
CVE-2026-72493 9.9 CRITICAL net: serialize netif_running() check in enqueue_to_backlog()
CVE-2026-72322 9.8 CRITICAL ipv6: mcast: Fix potential UAF in MLD delayed work
CVE-2026-72098 9.8 CRITICAL dm-verity: fix buffer overflow in FEC calculation
CVE-2026-72366 9.8 CRITICAL netfs: Fix netfs_create_write_req() to handle async cache object creation
CVE-2026-72355 9.8 CRITICAL netfs: Fix barriering when walking subrequest list
CVE-2026-72351 9.8 CRITICAL gue: validate REMCSUM private option length
CVE-2026-72339 9.8 CRITICAL qede: fix off-by-one in BD ring consumption on build_skb failure
CVE-2026-72130 9.8 CRITICAL nvmet-auth: reject short AUTH_RECEIVE buffers
CVE-2026-74428 9.8 CRITICAL rxrpc: Fix double unlock in rxrpc_recvmsg()
CVE-2026-74427 9.8 CRITICAL afs: Fix netns teardown to cancel the preallocation charger
CVE-2026-72317 9.8 CRITICAL SUNRPC: pin upper rpc_clnt across the TLS connect_worker
CVE-2026-72319 9.8 CRITICAL ipvs: ensure inner headers in ICMP errors are in headroom
CVE-2026-72393 9.8 CRITICAL eth: fbnic: don't cache shinfo across skb realloc

Showing top 20 of 844 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-68476

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