CVE-2026-68287

In the Linux kernel, the following vulnerability has been resolved: drop_monitor: fix size calculations for 64-bit attributes net_dm_packet_report_fill() and net_dm_hw_packet_report_fill() use nla_put_u64_64bit() to append 64-bit attributes (NET_DM_ATTR_PC and NET_DM_ATTR_TIMESTAMP). On 32-bit architectures without CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS, nla_put_u64_64bit() may append a 4-byte NET_DM_ATTR_PAD attribute for 64-bit alignment. However, net_dm_packet_report_size() and net_dm_hw_packet_report_size() used nla_total_size(sizeof(u64)) instead of nla_total_size_64bit(sizeof(u64)), budgeting 12 bytes instead of up to 16 bytes. This under-estimation of SKB size can lead to an skb_over_panic() when __nla_reserve() or skb_put() is subsequently called. Fix this by using nla_total_size_64bit(sizeof(u64)) in both size calculations.

CVSS v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://git.kernel.org/stable/c/0da8f531336b28a59b23e5a67d40eaed15906201
https://git.kernel.org/stable/c/1275a4769c126405c6c63b6372daff120ac679a6
https://git.kernel.org/stable/c/4a9e30764e80693bcf875c776170edce20f94fe0
https://git.kernel.org/stable/c/6048ed2dfb33426c8aef32f8d225ea91c66813db
https://git.kernel.org/stable/c/7089f7ab99c89f443c92d8fcc585e63f2727f0b3
https://git.kernel.org/stable/c/925669d4cfd47a9019ab29b40676215bab5dae35

Configurations

No configuration.

History

19 Oct 2026, 21:18

Type	Values Removed	Values Added
CWE		CWE-131

03 Oct 2026, 11:17

Type	Values Removed	Values Added
References		() https://git.kernel.org/stable/c/0da8f531336b28a59b23e5a67d40eaed15906201 - () https://git.kernel.org/stable/c/1275a4769c126405c6c63b6372daff120ac679a6 -

21 Sep 2026, 14:17

Type	Values Removed	Values Added
References		() https://git.kernel.org/stable/c/6048ed2dfb33426c8aef32f8d225ea91c66813db - () https://git.kernel.org/stable/c/925669d4cfd47a9019ab29b40676215bab5dae35 -

Information

Published : 2026-08-10 13:20

Updated : 2026-10-19 21:18

NVD link : CVE-2026-68287

Mitre link : CVE-2026-68287

CVE.ORG link : CVE-2026-68287

JSON object : View

Products Affected

No product.

CWE

CWE-131

Incorrect Calculation of Buffer Size

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"weaknesses": [{"type": "Secondary", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "description": [{"lang": "en", "value": "CWE-131"}]}], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrop_monitor: fix size calculations for 64-bit attributes\n\nnet_dm_packet_report_fill() and net_dm_hw_packet_report_fill() use\nnla_put_u64_64bit() to append 64-bit attributes (NET_DM_ATTR_PC and\nNET_DM_ATTR_TIMESTAMP).\n\nOn 32-bit architectures without CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS,\nnla_put_u64_64bit() may append a 4-byte NET_DM_ATTR_PAD attribute for\n64-bit alignment.\n\nHowever, net_dm_packet_report_size() and net_dm_hw_packet_report_size()\nused nla_total_size(sizeof(u64)) instead of nla_total_size_64bit(sizeof(u64)),\nbudgeting 12 bytes instead of up to 16 bytes.\n\nThis under-estimation of SKB size can lead to an skb_over_panic() when\n__nla_reserve() or skb_put() is subsequently called.\n\nFix this by using nla_total_size_64bit(sizeof(u64)) in both size calculations."}], "lastModified": "2026-10-19T21:18:00.920", "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}