Description
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.
References6
- git.kernel.org/stable/c/0da8f531336b28a59b23e5a67d40eaed15906201
- git.kernel.org/stable/c/1275a4769c126405c6c63b6372daff120ac679a6
- git.kernel.org/stable/c/4a9e30764e80693bcf875c776170edce20f94fe0
- git.kernel.org/stable/c/6048ed2dfb33426c8aef32f8d225ea91c66813db
- git.kernel.org/stable/c/7089f7ab99c89f443c92d8fcc585e63f2727f0b3
- git.kernel.org/stable/c/925669d4cfd47a9019ab29b40676215bab5dae35
Metrics
- CVSS 3.1
-
7.5
HIGH
Score source: CNA
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - EPSS — exploit probability
- 1% percentile: 53 · as of 12 November 2026
- CWE
- CWE-131
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