net: drop_monitor: fix info leak in NET_DM_ATTR_PAYLOAD
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.
CVE-2026-68288
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-2026-68288
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": "d427b152b663cb2b19fcd449d792e17edbe4a938",
"versionType": "git"
},
{
"status": "affected",
"version": "ca30707dee2bc8bc81cfd8b4277fe90f7ca6df1f",
"lessThan": "3c0bc7dcc5f9257d25c59eeb7ccb4df33dcfc446",
"versionType": "git"
},
{
"status": "affected",
"version": "ca30707dee2bc8bc81cfd8b4277fe90f7ca6df1f",
"lessThan": "05173de42a9923a3eaadebcb0dd5bc83ffba174c",
"versionType": "git"
},
{
"status": "affected",
"version": "ca30707dee2bc8bc81cfd8b4277fe90f7ca6df1f",
"lessThan": "89178ffe5bddc99c057ba2768db1f8d9c5e1408c",
"versionType": "git"
},
{
"status": "affected",
"version": "ca30707dee2bc8bc81cfd8b4277fe90f7ca6df1f",
"lessThan": "8fd6975d2aecc36b25ee82b6aef88e62a3527ccb",
"versionType": "git"
},
{
"status": "affected",
"version": "ca30707dee2bc8bc81cfd8b4277fe90f7ca6df1f",
"lessThan": "5e9c8baee0329fbefe7c67aea945e2a07f15e98b",
"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-2026-68288
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #8245 · Revision 1
- Added to Heist Feed
- Publisher date