drop_monitor: fix size calculations for 64-bit attributes
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.
CVE-2026-68287
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-68287
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "ca30707dee2bc8bc81cfd8b4277fe90f7ca6df1f",
"lessThan": "1275a4769c126405c6c63b6372daff120ac679a6",
"versionType": "git"
},
{
"status": "affected",
"version": "ca30707dee2bc8bc81cfd8b4277fe90f7ca6df1f",
"lessThan": "0da8f531336b28a59b23e5a67d40eaed15906201",
"versionType": "git"
},
{
"status": "affected",
"version": "ca30707dee2bc8bc81cfd8b4277fe90f7ca6df1f",
"lessThan": "6048ed2dfb33426c8aef32f8d225ea91c66813db",
"versionType": "git"
},
{
"status": "affected",
"version": "ca30707dee2bc8bc81cfd8b4277fe90f7ca6df1f",
"lessThan": "925669d4cfd47a9019ab29b40676215bab5dae35",
"versionType": "git"
},
{
"status": "affected",
"version": "ca30707dee2bc8bc81cfd8b4277fe90f7ca6df1f",
"lessThan": "4a9e30764e80693bcf875c776170edce20f94fe0",
"versionType": "git"
},
{
"status": "affected",
"version": "ca30707dee2bc8bc81cfd8b4277fe90f7ca6df1f",
"lessThan": "7089f7ab99c89f443c92d8fcc585e63f2727f0b3",
"versionType": "git"
}
],
"programFiles": [
"net/core/drop_monitor.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "5.4"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "5.4",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.1.189",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.158",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.111",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.53",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.1.6",
"versionType": "semver",
"lessThanOrEqual": "7.1.*"
},
{
"status": "unaffected",
"version": "7.2",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"net/core/drop_monitor.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-68287
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #41170 · Revision 1
- Added to Heist Feed
- Publisher date