CVE-2026-68288net: drop_monitor: fix info leak in NET_DM_ATTR_PAYLOAD
- —Not scoredno CVSS score yet
- 0.18%Exploitation in 30 daysEPSS · top 92% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
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.
Timeline
ID reserved
By Linux
- 11 days later
· 11 days later
Published
- 54 days later
· 54 days later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
No CVSS score yet: neither the CNA, CISA nor NVD has scored this CVE. NVD status: Received.
- EPSS (exploitation in 30 days)
- 0.18% · top 92% of all CVEs (14 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Not scored.
Affected products
- affected ca30707dee2bc8bc81cfd8b4277fe90f7ca6df1f – < d427b152b663cb2b19fcd449d792e17edbe4a938
- affected ca30707dee2bc8bc81cfd8b4277fe90f7ca6df1f – < 3c0bc7dcc5f9257d25c59eeb7ccb4df33dcfc446
- affected ca30707dee2bc8bc81cfd8b4277fe90f7ca6df1f – < 05173de42a9923a3eaadebcb0dd5bc83ffba174c
- affected ca30707dee2bc8bc81cfd8b4277fe90f7ca6df1f – < 89178ffe5bddc99c057ba2768db1f8d9c5e1408c
- affected ca30707dee2bc8bc81cfd8b4277fe90f7ca6df1f – < 8fd6975d2aecc36b25ee82b6aef88e62a3527ccb
- affected ca30707dee2bc8bc81cfd8b4277fe90f7ca6df1f – < 5e9c8baee0329fbefe7c67aea945e2a07f15e98b
- affected 5.4
- unaffected < 5.4
- unaffected 6.1.189 – ≤ 6.1.*
- unaffected 6.6.158 – ≤ 6.6.*
- unaffected 6.12.111 – ≤ 6.12.*
- unaffected 6.18.53 – ≤ 6.18.*
- unaffected 7.1.6 – ≤ 7.1.*
- unaffected 7.2 – ≤ *
References
References6
- https://git.kernel.org/stable/c/d427b152b663cb2b19fcd449d792e17edbe4a938 (opens in a new tab)
- https://git.kernel.org/stable/c/3c0bc7dcc5f9257d25c59eeb7ccb4df33dcfc446 (opens in a new tab)
- https://git.kernel.org/stable/c/05173de42a9923a3eaadebcb0dd5bc83ffba174c (opens in a new tab)
- https://git.kernel.org/stable/c/89178ffe5bddc99c057ba2768db1f8d9c5e1408c (opens in a new tab)
- https://git.kernel.org/stable/c/8fd6975d2aecc36b25ee82b6aef88e62a3527ccb (opens in a new tab)
- https://git.kernel.org/stable/c/5e9c8baee0329fbefe7c67aea945e2a07f15e98b (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-55389 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-68288)Record last updated .