CVE-2026-68287drop_monitor: fix size calculations for 64-bit attributes
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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
- 7.5 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Received
- Record last updated
- Oct 16, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from ca30707dee2bc8bc81cfd8b4277fe90f7ca6df1f before 1275a4769c126405c6c63b6372daff120ac679a6; from ca30707dee2bc8bc81cfd8b4277fe90f7ca6df1f before 0da8f531336b28a59b23e5a67d40eaed15906201; from ca30707dee2bc8bc81cfd8b4277fe90f7ca6df1f before 6048ed2dfb33426c8aef32f8d225ea91c66813db; from ca30707dee2bc8bc81cfd8b4277fe90f7ca6df1f before 925669d4cfd47a9019ab29b40676215bab5dae35; from ca30707dee2bc8bc81cfd8b4277fe90f7ca6df1f before 4a9e30764e80693bcf875c776170edce20f94fe0; from ca30707dee2bc8bc81cfd8b4277fe90f7ca6df1f before 7089f7ab99c89f443c92d8fcc585e63f2727f0b3 | CNA record |
References
- https://git.kernel.org/stable/c/1275a4769c126405c6c63b6372daff120ac679a6
- https://git.kernel.org/stable/c/0da8f531336b28a59b23e5a67d40eaed15906201
- https://git.kernel.org/stable/c/6048ed2dfb33426c8aef32f8d225ea91c66813db
- https://git.kernel.org/stable/c/925669d4cfd47a9019ab29b40676215bab5dae35
- https://git.kernel.org/stable/c/4a9e30764e80693bcf875c776170edce20f94fe0
- https://git.kernel.org/stable/c/7089f7ab99c89f443c92d8fcc585e63f2727f0b3
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.