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CVE-2026-92489— xfrm: Fix skb double-free in xfrm_dev_direct_output()

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.

在 Linux 内核中，以下漏洞已得到修复： xfrm：修复 xfrm_dev_direct_output() 中的 skb 双重释放问题 当 的返回值不为 1 时，表示 skb 已被消费或所有权已转移。然而， 在此路径下仍然会释放 skb，这会导致当 netfilter 丢弃数据包时发生双重释放，并使其他所有权持有者失效。 修复方法是直接返回 的结果，以匹配 中的所有权处理方式。

CVSS 9.8 · Critical EPSS 0.46% · P39

Affected Version Matrix 16

VendorProduct Version RangeStatus
Linux Linux bfb9b9404a53a72524ce695551755117e9d3deb0< 621871b696b108026bf4b44ed4085ffa2102f417 affected
a0395e96831adee8ffa016bf958e4dce9ece656e< bc9297796bfdcc8d9609236e54519a4f38737aac affected
5eddd76ec2fd1988f0a3450fde9730b10dd22992< 02deb637e965950148752a304dd1471212dd6470 affected
5eddd76ec2fd1988f0a3450fde9730b10dd22992< 56a347950e661c1a7f8f31c43a2ea53c2323b6f4 affected
5eddd76ec2fd1988f0a3450fde9730b10dd22992< 2aed51fc58d9ce450e2c116efb956160fd06fa02 affected
d1d673a5bede3767252cff19c0ab1e5387c6f43f affected
6.6.85< 6.6.157 affected
6.12.21< 6.12.110 affected
… +8 more rows
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I. Basic Information for CVE-2026-92489

Vulnerability Information
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Vulnerability Title
xfrm: Fix skb double-free in xfrm_dev_direct_output()
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: xfrm: Fix skb double-free in xfrm_dev_direct_output() A return value other than 1 from local_out() means that the skb has been consumed or its ownership was transferred. xfrm_dev_direct_output() nevertheless frees the skb on this path, causing a double-free when netfilter drops the packet and invalidating any other owner. Return the local_out() result directly, matching the ownership handling in xfrm_output_resume().
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

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux bfb9b9404a53a72524ce695551755117e9d3deb0 ~ 621871b696b108026bf4b44ed4085ffa2102f417 -
Linux Linux 6.14 -

II. Public POCs for CVE-2026-92489

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III. Intelligence Information for CVE-2026-92489

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Patches & Fixes for CVE-2026-92489 (5)

Same Patch Batch · Linux · 2026-09-17 · 600 CVEs total

CVE-2026-90104 9.8 CRITICAL NFSv4.1: zero referring call lists before decoding
CVE-2026-90173 9.8 CRITICAL smb: smbdirect: free completion queues with ib_free_cq()
CVE-2026-90235 9.8 CRITICAL sunrpc: xprtsock: annotate shared socket callbacks with READ_ONCE/WRITE_ONCE
CVE-2026-90151 9.8 CRITICAL NFSv4: remove callback IDR entry on client allocation failure
CVE-2026-90110 9.4 CRITICAL inetpeer: randomize RB-tree node comparison using SipHash
CVE-2026-90230 9.1 CRITICAL nvmet: fix heap out-of-bounds read in nvmet_auth_negotiate()
CVE-2026-90413 9.1 CRITICAL IB/isert: reject login PDUs declaring more data than was received
CVE-2026-90414 9.1 CRITICAL IB/isert: reject PDUs declaring more data than was received
CVE-2026-93042 8.8 HIGH dmaengine: dw-edma: Terminate all descriptors without callbacks
CVE-2026-93189 8.8 HIGH HID: core: quiesce input in hid_hw_stop() to prevent use-after-free
CVE-2026-90329 8.8 HIGH HID: synchronize input before cleaning up a failed probe
CVE-2026-90256 8.8 HIGH Bluetooth: L2CAP: use proto_lock for l2cap_data to fix l2cap_disconn_ind
CVE-2026-90357 8.8 HIGH wifi: mt76: mt7915: unlink TWT flow if the MCU rejects the agreement
CVE-2026-90255 8.8 HIGH Bluetooth: hci_conn: fix the SCO setup context lifetime
CVE-2026-90367 8.8 HIGH wifi: mt76: mt7996: hold dev->mt76.mutex while disabling tx worker in SER
CVE-2026-90381 8.8 HIGH wifi: mt76: fix handling channel context with different bands in mt76_switch_vif_chanctx()
CVE-2026-90379 8.8 HIGH wifi: mt76: mt7921: Add PCIe AER handler support to prevent system crash
CVE-2026-90380 8.8 HIGH wifi: mt76: mt792x: fix use-after-free in mt76_rx_poll_complete
CVE-2026-90286 8.8 HIGH drm/amdgpu/gfx6: Use PFP on the compute queues too
CVE-2026-90240 8.8 HIGH iommu/vt-d: Flush context cache with correct SID when tearing down aliases

Showing top 20 of 600 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-92489

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