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CVE-2026-72463— xfrm: Fix dev use-after-free in xfrm async resumption

CVSS 9.8 · Critical EPSS 0.41% · P34

Possible ATT&CK Techniques 1AI

T1564.004 · NTFS File Attributes

Affected Version Matrix 12

VendorProductVersion RangeStatus
LinuxLinux1c428b03840094410c5fb6a5db30640486bbbfcb< 63a30015199912bd5055bead8001b1ae68a67cdbaffected
1c428b03840094410c5fb6a5db30640486bbbfcb< 8045c0df98d4f14c54e5cb875f1c9c0ce89fe4ffaffected
4236c30b437b80f673b9e08c8fae38b8d471ac9eaffected
0f451b43c88bf2b9c038b414be580efee42e031baffected
5002beda5cac69d522dc54da0d5d463ed9c963d2affected
6.12.94< 6.13affected
6.18.23< 6.19affected
6.19.13< 6.20affected
… +4 more rows
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I. Basic Information for CVE-2026-72463

Vulnerability Information
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Vulnerability Title
xfrm: Fix dev use-after-free in xfrm async resumption
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: xfrm: Fix dev use-after-free in xfrm async resumption xfrm async resumption hold skb->dev refcnt until after transport_finish. However, xfrm_rcv_cb may modify skb->dev to tunnel dev without taking device reference, such as vti_rcv_cb. The subsequent async resumption will decrement the tunnel device's reference count, which lead to uaf of tunnel dev and refcnt leak of orig dev as below: unregister_netdevice: waiting for vti1 to become free. Usage count = -2 Stash the original skb->dev to fix refcnt imbalance. The new skb->dev set by xfrm_rcv_cb can race with device teardown. Extend rcu protection over xfrm_rcv_cb and transport_finish to prevent races.
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 7.0版本存在安全漏洞，该漏洞源于xfrm异步恢复时对skb->dev引用计数处理不当，可能导致隧道设备释放后重用和引用计数泄漏。
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

VendorProductAffected VersionsCPESubscribe
LinuxLinux 1c428b03840094410c5fb6a5db30640486bbbfcb ~ 63a30015199912bd5055bead8001b1ae68a67cdb -
LinuxLinux 7.0 -

II. Public POCs for CVE-2026-72463

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III. Intelligence Information for CVE-2026-72463

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Patches & Fixes for CVE-2026-72463 (2)

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

CVE-2026-7242110.0 CRITICALipv4: fib: Don't ignore error route in local/main tables.
CVE-2026-7427910.0 CRITICALcrypto: cavium/cpt - fix DMA cleanup using wrong loop index
CVE-2026-7240810.0 CRITICALgeneve: gate GRO hint in geneve_gro_complete() on gs->gro_hint
CVE-2026-7240710.0 CRITICALgeneve: validate inner network offset in geneve_gro_complete()
CVE-2026-7430910.0 CRITICALvdpa/octeon_ep: fix IRQ-to-ring mapping in interrupt handler
CVE-2026-7428010.0 CRITICALcrypto: marvell/octeontx - fix DMA cleanup using wrong loop index
CVE-2026-7447510.0 CRITICALvxlan: use neigh_ha_snapshot() in route_shortcircuit()
CVE-2026-724939.9 CRITICALnet: serialize netif_running() check in enqueue_to_backlog()
CVE-2026-743619.8 CRITICALnvme: fix FDP fdpcidx bounds check
CVE-2026-742689.8 CRITICALtcp: clear sock_ops cb flags before force-closing a child socket
CVE-2026-720649.8 CRITICALnet: mana: Sync page pool RX frags for CPU
CVE-2026-720659.8 CRITICALnet: mana: Validate the packet length reported by the NIC
CVE-2026-720699.8 CRITICALlocking/rt: Fix the incorrect RCU protection in rt_spin_unlock()
CVE-2026-721859.8 CRITICALntfs: fix WARN_ON for resident attribute in ntfs_map_runlist_nolock()
CVE-2026-722499.8 CRITICALnetfilter: flowtable: use dst in this direction when pushing IPIP header
CVE-2026-724949.8 CRITICALRDMA/irdma: Replace waitqueue and flag with completion
CVE-2026-722489.8 CRITICALnetfilter: flowtable: support IPIP tunnel with direct xmit
CVE-2026-724919.8 CRITICALnet/9p: fix race condition on rdma->state in trans_rdma.c
CVE-2026-722519.8 CRITICALnetfilter: nf_nat_sip: reload possible stale data pointer
CVE-2026-744809.8 CRITICALnet: bridge: stop fast-leave after deleting a port group

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

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-72463

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