CVE-2026-43085

MEDIUM EPSS 2.4%
Published May 6, 20261mo ago · Modified Jun 17, 20262w ago
5.5 CVSS 3.1
Medium
Find Similar
Published May 6, 2026 1mo ago
Last Modified Jun 17, 2026 2w ago

Description

In the Linux kernel, the following vulnerability has been resolved: netfilter: nfnetlink_log: initialize nfgenmsg in NLMSG_DONE terminator When batching multiple NFLOG messages (inst->qlen > 1), __nfulnl_send() appends an NLMSG_DONE terminator with sizeof(struct nfgenmsg) payload via nlmsg_put(), but never initializes the nfgenmsg bytes. The nlmsg_put() helper only zeroes alignment padding after the payload, not the payload itself, so four bytes of stale kernel heap data are leaked to userspace in the NLMSG_DONE message body. Use nfnl_msg_put() to build the NLMSG_DONE terminator, which initializes the nfgenmsg payload via nfnl_fill_hdr(), consistent with how __build_packet_message() already constructs NFULNL_MSG_PACKET headers.

CVSS Details

Base Score
5.5
Exploitability
1.8
Impact
3.6
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
2.4% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Affected Products 15

VendorProductVersionRange
linuxlinux_kernel*≥2.6.23.1  –  <5.10.258
linuxlinux_kernel*≥5.11  –  <5.15.209
linuxlinux_kernel*≥5.16  –  <6.1.175
linuxlinux_kernel*≥6.2  –  <6.6.136
linuxlinux_kernel*≥6.7  –  <6.12.83
linuxlinux_kernel*≥6.13  –  <6.18.24
linuxlinux_kernel*≥6.19  –  <6.19.14
linuxlinux_kernel2.6.23any
linuxlinux_kernel7.0any
linuxlinux_kernel7.0any
linuxlinux_kernel7.0any
linuxlinux_kernel7.0any
linuxlinux_kernel7.0any
linuxlinux_kernel7.0any
linuxlinux_kernel7.0any

References 8

  • git.kernel.org https://git.kernel.org/stable/c/15d209bccf9273b4a8b4e579ba0e92d065b6ec8c
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/1f3083aec8836213da441270cdb1ab612dd82cf4
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/296f18e1c3a87c915a92ed27832d5040a22d1072
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/368c22aea490f6f50df831b4f9e3623787686c5b
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/57cc509d82b46150a11dcecc8b25eaa177eda34d
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/9e2182865de781c41ab16b7985e9d26dcefea867
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/d1399632ba255d2e02c757af5d9f5d9279ce168c
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/d552bcfca323d175664d7444989b04f55666978a
    Patch

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/15d209bccf9273b4a8b4e579ba0e92d065b6ec8c
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/1f3083aec8836213da441270cdb1ab612dd82cf4
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/296f18e1c3a87c915a92ed27832d5040a22d1072
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/368c22aea490f6f50df831b4f9e3623787686c5b
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/57cc509d82b46150a11dcecc8b25eaa177eda34d
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/9e2182865de781c41ab16b7985e9d26dcefea867
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/d1399632ba255d2e02c757af5d9f5d9279ce168c
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/d552bcfca323d175664d7444989b04f55666978a
    Patch