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CVE-2026-90063— virtio-net: Ensure that TCP packets don't overflow gso_segs

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： virtio-net：确保 TCP 数据包不会导致 gso_segs 溢出 用户可以在通过 的 套接字构造的数据包中指定任意 ，甚至可能小于 。与此同时， 。当用户构造 的数据包时，在将 SKB 长度除以 时，存在部分 GSO 的 16 位 字段溢出的风险。 解决方案：将 TCP 数据包的 调整为至少等于 。对于 UDP GSO 数据包，保持其 不变，因为 是有效的，并在 中进行了明确测试。

AI Predicted 5.5 Difficulty: Moderate EPSS 0.21% · P11

Affected Version Matrix 24

VendorProduct Version RangeStatus
Linux Linux 7c6d2ecbda83150b2036a2b36b21381ad4667762< d3d111fe809773edbb4ae121e36253b7d683509a affected
7c6d2ecbda83150b2036a2b36b21381ad4667762< 8f6667a081887c2b59c6f3dd86c1789ada563762 affected
7c6d2ecbda83150b2036a2b36b21381ad4667762< 339f47ae04dcc6b5a730dd6bc70dddc8937c3260 affected
7c6d2ecbda83150b2036a2b36b21381ad4667762< 29bd12c7c5f9d6cf855b87bace18f71e9607f9e8 affected
7c6d2ecbda83150b2036a2b36b21381ad4667762< 0e5ed3b98d1d8d251acfdccfeaa607453ad12954 affected
7c6d2ecbda83150b2036a2b36b21381ad4667762< 75c271c48f483af678e514734e10b2452410e08c affected
7c6d2ecbda83150b2036a2b36b21381ad4667762< c27c449d455aafd9018a3cbab150f1c42c87923f affected
bfbaf151efe491e30697e21c8b7ae1b615480873 affected
… +16 more rows
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I. Basic Information for CVE-2026-90063

Vulnerability Information
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Vulnerability Title
virtio-net: Ensure that TCP packets don't overflow gso_segs
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: virtio-net: Ensure that TCP packets don't overflow gso_segs The user can specify any gso_size in a packet crafted with an AF_PACKET PACKET_VNET_HDR socket, even smaller than TCP_MIN_GSO_SIZE = 8. At the same time, GSO_MAX_SIZE = 8 * GSO_MAX_SEGS = 8 * 65535. When the user crafts a packet with gso_size < 8, there is a risk for partial GSO to overflow the 16-bit gso_segs field when dividing the SKB length by gso_size. Adjust gso_size of TCP packets to be at least TCP_MIN_GSO_SIZE = 8. Keep gso_size of UDP GSO packets, as gso_size=1 is valid and explicitly tested at tools/testing/selftests/net/tun.c:649.
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

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux 7c6d2ecbda83150b2036a2b36b21381ad4667762 ~ d3d111fe809773edbb4ae121e36253b7d683509a -
Linux Linux 5.7 -

II. Public POCs for CVE-2026-90063

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III. Intelligence Information for CVE-2026-90063

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Patches & Fixes for CVE-2026-90063 (7)

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

CVE-2026-90173 9.8 CRITICAL smb: smbdirect: free completion queues with ib_free_cq()
CVE-2026-92489 9.8 CRITICAL xfrm: Fix skb double-free in xfrm_dev_direct_output()
CVE-2026-90104 9.8 CRITICAL NFSv4.1: zero referring call lists before decoding
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-2026-90414 9.1 CRITICAL IB/isert: reject PDUs declaring more data than was received
CVE-2026-90413 9.1 CRITICAL IB/isert: reject login PDUs declaring more data than was received
CVE-2026-90230 9.1 CRITICAL nvmet: fix heap out-of-bounds read in nvmet_auth_negotiate()
CVE-2026-90381 8.8 HIGH wifi: mt76: fix handling channel context with different bands in mt76_switch_vif_chanctx()
CVE-2026-90329 8.8 HIGH HID: synchronize input before cleaning up a failed probe
CVE-2026-90162 8.8 HIGH ksmbd: defer publishing granted locks to prevent UAF/double-free race
CVE-2026-90357 8.8 HIGH wifi: mt76: mt7915: unlink TWT flow if the MCU rejects the agreement
CVE-2026-90367 8.8 HIGH wifi: mt76: mt7996: hold dev->mt76.mutex while disabling tx worker in SER
CVE-2026-90371 8.8 HIGH wifi: mt76: fix RXDMAD_C buffer recycling race
CVE-2026-93042 8.8 HIGH dmaengine: dw-edma: Terminate all descriptors without callbacks
CVE-2026-90425 8.8 HIGH iommu/tegra241-cmdqv: Require exactly one Stream ID for a vSID
CVE-2026-90240 8.8 HIGH iommu/vt-d: Flush context cache with correct SID when tearing down aliases
CVE-2026-90379 8.8 HIGH wifi: mt76: mt7921: Add PCIe AER handler support to prevent system crash
CVE-2026-90256 8.8 HIGH Bluetooth: L2CAP: use proto_lock for l2cap_data to fix l2cap_disconn_ind

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-2026-90063

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