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CVE-2026-46172— ipv6: xfrm6: release dst on error in xfrm6_rcv_encap()

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基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于ipv6 xfrm6中xfrm6_rcv_encap()错误路径未释放dst，可能导致dst条目泄漏。

AI Predicted 4.7 Difficulty: Moderate EPSS 0.13% · P3

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux 0146dca70b877b73c5fd9c67912b8a0ca8a7bac7< a0721bcd72641c32b281f227a94505b31cf54117 affected
0146dca70b877b73c5fd9c67912b8a0ca8a7bac7< a20b34f6e854fe6f2aa82528fae7a88759919eb4 affected
0146dca70b877b73c5fd9c67912b8a0ca8a7bac7< 870560015ce6e0d8f841c6a8aba33c44be52c727 affected
0146dca70b877b73c5fd9c67912b8a0ca8a7bac7< c2efc4956981066df2fef1cc77391b523db6d8e4 affected
0146dca70b877b73c5fd9c67912b8a0ca8a7bac7< 554c9b090c8ac5b1c5c507f4badf8d5d0c9c6e13 affected
0146dca70b877b73c5fd9c67912b8a0ca8a7bac7< 9d5047782f9bd2829e529df69209bf3232eb561f affected
0146dca70b877b73c5fd9c67912b8a0ca8a7bac7< 6a5eec0a2a0e99ec9743cf8f1c4082178811d90a affected
0146dca70b877b73c5fd9c67912b8a0ca8a7bac7< bc0fcb9823cd0894934cf968b525c575833d7078 affected
… +10 more rows
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I. Basic Information for CVE-2026-46172

Vulnerability Information
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Vulnerability Title
ipv6: xfrm6: release dst on error in xfrm6_rcv_encap()
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: ipv6: xfrm6: release dst on error in xfrm6_rcv_encap() xfrm6_rcv_encap() performs an IPv6 route lookup when the skb does not already have a dst attached. ip6_route_input_lookup() returns a referenced dst entry even when the lookup resolves to an error route. If dst->error is set, xfrm6_rcv_encap() drops the skb without attaching the dst to the skb and without releasing the reference returned by the lookup. Repeated packets hitting this path therefore leak dst entries. Release the dst before jumping to the drop path.
Source: CVE Program / CVE List V5
CVSS Information
N/A
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基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于ipv6 xfrm6中xfrm6_rcv_encap()错误路径未释放dst，可能导致dst条目泄漏。
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

Vendor Product Affected Versions CPE Subscribe
Linux Linux 0146dca70b877b73c5fd9c67912b8a0ca8a7bac7 ~ a0721bcd72641c32b281f227a94505b31cf54117 -
Linux Linux 5.8 -

II. Public POCs for CVE-2026-46172

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III. Intelligence Information for CVE-2026-46172

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Patches & Fixes for CVE-2026-46172 (8)

Same Patch Batch · Linux · 2026-05-28 · 135 CVEs total

CVE-2026-46195 9.8 CRITICAL smb: client: validate dacloffset before building DACL pointers
CVE-2026-46135 9.8 CRITICAL nvmet-tcp: fix race between ICReq handling and queue teardown
CVE-2026-46137 9.8 CRITICAL mptcp: pm: ADD_ADDR rtx: fix potential data-race
CVE-2026-46115 9.8 CRITICAL block: add pgmap check to biovec_phys_mergeable
CVE-2026-46155 9.1 CRITICAL smb/client: fix out-of-bounds read in smb2_compound_op()
CVE-2026-46185 9.1 CRITICAL smb/client: fix out-of-bounds read in symlink_data()
CVE-2026-46119 9.1 CRITICAL libceph: Fix slab-out-of-bounds access in auth message processing
CVE-2026-46238 8.8 HIGH batman-adv: stop caching unowned originator pointers in BAT IV
CVE-2026-46174 8.8 HIGH x86/CPU/AMD: Prevent improper isolation of shared resources in Zen2's op cache
CVE-2026-46125 8.8 HIGH wifi: mac80211: remove station if connection prep fails
CVE-2026-46198 8.8 HIGH batman-adv: fix integer overflow on buff_pos
CVE-2026-46166 8.8 HIGH wifi: mac80211: use safe list iteration in radar detect work
CVE-2026-46113 8.8 HIGH KVM: x86: Fix shadow paging use-after-free due to unexpected GFN
CVE-2026-46212 8.8 HIGH batman-adv: bla: prevent use-after-free when deleting claims
CVE-2026-46152 8.8 HIGH wifi: mac80211: drop stray 'static' from fast-RX rx_result
CVE-2026-46138 8.1 HIGH Bluetooth: hci_event: Fix OOB read and infinite loop in hci_le_create_big_complete_evt
CVE-2026-46232 8.1 HIGH HID: playstation: Clamp num_touch_reports
CVE-2026-46215 7.8 HIGH drm: Set old handle to NULL before prime swap in change_handle
CVE-2026-46176 7.8 HIGH RDMA/mlx5: Fix error path fall-through in mlx5_ib_dev_res_srq_init()
CVE-2026-46157 7.8 HIGH ALSA: pcm: oss: Fix data race at accessing runtime.oss.trigger

Showing top 20 of 135 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-46172

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