CVE-2026-68288 (GCVE-0-2026-68288)
Vulnerability from cvelistv5 – Published: 2026-08-10 12:02 – Updated: 2026-10-03 10:55
VLAI
EPSS
VEX
Title
net: drop_monitor: fix info leak in NET_DM_ATTR_PAYLOAD
Summary
In the Linux kernel, the following vulnerability has been resolved:
net: drop_monitor: fix info leak in NET_DM_ATTR_PAYLOAD
net_dm_packet_report_fill() and net_dm_hw_packet_report_fill() open code
the NET_DM_ATTR_PAYLOAD attribute to avoid zeroing the packet payload
before overwriting it with skb_copy_bits().
skb_put() reserves nla_total_size(payload_len), i.e. the header plus the
NLA_ALIGN() padding, but only payload_len bytes are copied in. When
payload_len is not a multiple of 4 the 1-3 padding bytes are never
initialized and are leaked to user space inside the netlink message.
KMSAN confirms the leak for the software path when the packet payload
length is not 4-byte aligned:
BUG: KMSAN: kernel-infoleak in _copy_to_iter
_copy_to_iter
__skb_datagram_iter
skb_copy_datagram_iter
netlink_recvmsg
sock_recvmsg
__sys_recvfrom
Uninit was created at:
kmem_cache_alloc_node_noprof
__alloc_skb
net_dm_packet_work
Bytes 173-175 of 176 are uninitialized
Use __nla_reserve(), which sets up the attribute header and zeroes the
padding, instead of open coding the attribute construction.
Severity
No CVSS data available.
Assigner
References
6 references
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Linux | Linux |
Affected:
ca30707dee2bc8bc81cfd8b4277fe90f7ca6df1f , < d427b152b663cb2b19fcd449d792e17edbe4a938
(git)
Affected: ca30707dee2bc8bc81cfd8b4277fe90f7ca6df1f , < 3c0bc7dcc5f9257d25c59eeb7ccb4df33dcfc446 (git) Affected: ca30707dee2bc8bc81cfd8b4277fe90f7ca6df1f , < 05173de42a9923a3eaadebcb0dd5bc83ffba174c (git) Affected: ca30707dee2bc8bc81cfd8b4277fe90f7ca6df1f , < 89178ffe5bddc99c057ba2768db1f8d9c5e1408c (git) Affected: ca30707dee2bc8bc81cfd8b4277fe90f7ca6df1f , < 8fd6975d2aecc36b25ee82b6aef88e62a3527ccb (git) Affected: ca30707dee2bc8bc81cfd8b4277fe90f7ca6df1f , < 5e9c8baee0329fbefe7c67aea945e2a07f15e98b (git) |
|
| Linux | Linux |
Affected:
5.4
Unaffected: 0 , < 5.4 (semver) Unaffected: 6.1.189 , ≤ 6.1.* (semver) Unaffected: 6.6.158 , ≤ 6.6.* (semver) Unaffected: 6.12.111 , ≤ 6.12.* (semver) Unaffected: 6.18.53 , ≤ 6.18.* (semver) Unaffected: 7.1.6 , ≤ 7.1.* (semver) Unaffected: 7.2 , ≤ * (original_commit_for_fix) |
{
"containers": {
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"product": "Linux",
"programFiles": [
"net/core/drop_monitor.c"
],
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{
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"status": "affected",
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"versionType": "git"
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{
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{
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]
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{
"defaultStatus": "affected",
"product": "Linux",
"programFiles": [
"net/core/drop_monitor.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "5.4"
},
{
"lessThan": "5.4",
"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"version": "6.1.189",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"version": "6.6.158",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.12.*",
"status": "unaffected",
"version": "6.12.111",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.18.*",
"status": "unaffected",
"version": "6.18.53",
"versionType": "semver"
},
{
"lessThanOrEqual": "7.1.*",
"status": "unaffected",
"version": "7.1.6",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "7.2",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"cpeMatch": [
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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},
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{
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{
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{
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}
],
"negate": false,
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],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: drop_monitor: fix info leak in NET_DM_ATTR_PAYLOAD\n\nnet_dm_packet_report_fill() and net_dm_hw_packet_report_fill() open code\nthe NET_DM_ATTR_PAYLOAD attribute to avoid zeroing the packet payload\nbefore overwriting it with skb_copy_bits().\n\nskb_put() reserves nla_total_size(payload_len), i.e. the header plus the\nNLA_ALIGN() padding, but only payload_len bytes are copied in. When\npayload_len is not a multiple of 4 the 1-3 padding bytes are never\ninitialized and are leaked to user space inside the netlink message.\n\nKMSAN confirms the leak for the software path when the packet payload\nlength is not 4-byte aligned:\n\n BUG: KMSAN: kernel-infoleak in _copy_to_iter\n _copy_to_iter\n __skb_datagram_iter\n skb_copy_datagram_iter\n netlink_recvmsg\n sock_recvmsg\n __sys_recvfrom\n Uninit was created at:\n kmem_cache_alloc_node_noprof\n __alloc_skb\n net_dm_packet_work\n Bytes 173-175 of 176 are uninitialized\n\nUse __nla_reserve(), which sets up the attribute header and zeroes the\npadding, instead of open coding the attribute construction."
}
],
"providerMetadata": {
"dateUpdated": "2026-10-03T10:55:44.026Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/d427b152b663cb2b19fcd449d792e17edbe4a938"
},
{
"url": "https://git.kernel.org/stable/c/3c0bc7dcc5f9257d25c59eeb7ccb4df33dcfc446"
},
{
"url": "https://git.kernel.org/stable/c/05173de42a9923a3eaadebcb0dd5bc83ffba174c"
},
{
"url": "https://git.kernel.org/stable/c/89178ffe5bddc99c057ba2768db1f8d9c5e1408c"
},
{
"url": "https://git.kernel.org/stable/c/8fd6975d2aecc36b25ee82b6aef88e62a3527ccb"
},
{
"url": "https://git.kernel.org/stable/c/5e9c8baee0329fbefe7c67aea945e2a07f15e98b"
}
],
"title": "net: drop_monitor: fix info leak in NET_DM_ATTR_PAYLOAD",
"x_generator": {
"engine": "bippy-1.2.0"
}
}
},
"cveMetadata": {
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"assignerShortName": "Linux",
"cveId": "CVE-2026-68288",
"datePublished": "2026-08-10T12:02:21.097Z",
"dateReserved": "2026-07-30T09:28:09.380Z",
"dateUpdated": "2026-10-03T10:55:44.026Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
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"cve": "CVE-2026-68288",
"date": "2026-10-12",
"epss": "0.0018",
"percentile": "0.07009"
},
"nvd": {
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"product": "Linux",
"programFiles": [
"net/core/drop_monitor.c"
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"version": "7.2",
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}
]
}
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: drop_monitor: fix info leak in NET_DM_ATTR_PAYLOAD\n\nnet_dm_packet_report_fill() and net_dm_hw_packet_report_fill() open code\nthe NET_DM_ATTR_PAYLOAD attribute to avoid zeroing the packet payload\nbefore overwriting it with skb_copy_bits().\n\nskb_put() reserves nla_total_size(payload_len), i.e. the header plus the\nNLA_ALIGN() padding, but only payload_len bytes are copied in. When\npayload_len is not a multiple of 4 the 1-3 padding bytes are never\ninitialized and are leaked to user space inside the netlink message.\n\nKMSAN confirms the leak for the software path when the packet payload\nlength is not 4-byte aligned:\n\n BUG: KMSAN: kernel-infoleak in _copy_to_iter\n _copy_to_iter\n __skb_datagram_iter\n skb_copy_datagram_iter\n netlink_recvmsg\n sock_recvmsg\n __sys_recvfrom\n Uninit was created at:\n kmem_cache_alloc_node_noprof\n __alloc_skb\n net_dm_packet_work\n Bytes 173-175 of 176 are uninitialized\n\nUse __nla_reserve(), which sets up the attribute header and zeroes the\npadding, instead of open coding the attribute construction."
}
],
"id": "CVE-2026-68288",
"lastModified": "2026-10-03T11:17:36.573",
"metrics": {},
"published": "2026-08-10T13:20:18.123",
"references": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/05173de42a9923a3eaadebcb0dd5bc83ffba174c"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/3c0bc7dcc5f9257d25c59eeb7ccb4df33dcfc446"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/5e9c8baee0329fbefe7c67aea945e2a07f15e98b"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/89178ffe5bddc99c057ba2768db1f8d9c5e1408c"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/8fd6975d2aecc36b25ee82b6aef88e62a3527ccb"
},
{
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}
],
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"vulnStatus": "Received"
}
},
"redhat_vex": {
"aggregate_severity": "Low",
"current_release_date": "2026-08-11T15:34:24+00:00",
"cve": "CVE-2026-68288",
"id": "CVE-2026-68288",
"initial_release_date": "2026-08-10T00:00:00+00:00",
"product_status:known_affected": "246",
"product_status:known_not_affected": "28",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "kernel: net: drop_monitor: fix info leak in NET_DM_ATTR_PAYLOAD",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-68288.json",
"version": "3"
},
"suse_vex": {
"aggregate_severity": "low",
"current_release_date": "2026-10-03T00:35:02Z",
"cve": "CVE-2026-68288",
"id": "CVE-2026-68288",
"initial_release_date": "2026-08-22T00:54:51Z",
"product_status:known_affected": "396",
"product_status:known_not_affected": "337",
"product_status:recommended": "252",
"source": "SUSE CSAF VEX",
"status": "interim",
"title": "SUSE CVE CVE-2026-68288",
"url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-68288.json",
"version": "9"
}
}
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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