netfilter: nfnetlink_log: initialize nfgenmsg in NLMSG_DONE terminator

MITRE NVD CVE.ORG JSON API Print: PDF PDF

Summary

CVECVE-2026-43085
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-05-06 10:16:21 UTC
Updated2026-06-01 18:14:48 UTC
DescriptionIn 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.

Risk And Classification

Primary CVSS: v3.1 5.5 MEDIUM from [email protected]

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

EPSS: 0.000130000 probability, percentile 0.023540000 (date 2026-06-04)

Problem Types: NVD-CWE-noinfo

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Linux Linux Kernel All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 29c5d4afba51c71cfeadd3f74f3c42e064483fb0 296f18e1c3a87c915a92ed27832d5040a22d1072 git Not specified
CNA Linux Linux affected 29c5d4afba51c71cfeadd3f74f3c42e064483fb0 9e2182865de781c41ab16b7985e9d26dcefea867 git Not specified
CNA Linux Linux affected 29c5d4afba51c71cfeadd3f74f3c42e064483fb0 57cc509d82b46150a11dcecc8b25eaa177eda34d git Not specified
CNA Linux Linux affected 29c5d4afba51c71cfeadd3f74f3c42e064483fb0 368c22aea490f6f50df831b4f9e3623787686c5b git Not specified
CNA Linux Linux affected 29c5d4afba51c71cfeadd3f74f3c42e064483fb0 d1399632ba255d2e02c757af5d9f5d9279ce168c git Not specified
CNA Linux Linux affected 29c5d4afba51c71cfeadd3f74f3c42e064483fb0 d552bcfca323d175664d7444989b04f55666978a git Not specified
CNA Linux Linux affected 29c5d4afba51c71cfeadd3f74f3c42e064483fb0 15d209bccf9273b4a8b4e579ba0e92d065b6ec8c git Not specified
CNA Linux Linux affected 29c5d4afba51c71cfeadd3f74f3c42e064483fb0 1f3083aec8836213da441270cdb1ab612dd82cf4 git Not specified
CNA Linux Linux affected 2.6.23 Not specified
CNA Linux Linux unaffected 2.6.23 semver Not specified
CNA Linux Linux unaffected 5.10.258 5.10.* semver Not specified
CNA Linux Linux unaffected 5.15.209 5.15.* semver Not specified
CNA Linux Linux unaffected 6.1.175 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.136 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.83 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.24 6.18.* semver Not specified
CNA Linux Linux unaffected 6.19.14 6.19.* semver Not specified
CNA Linux Linux unaffected 7.0 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/57cc509d82b46150a11dcecc8b25eaa177eda34d 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/1f3083aec8836213da441270cdb1ab612dd82cf4 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/d1399632ba255d2e02c757af5d9f5d9279ce168c 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/9e2182865de781c41ab16b7985e9d26dcefea867 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/15d209bccf9273b4a8b4e579ba0e92d065b6ec8c 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/296f18e1c3a87c915a92ed27832d5040a22d1072 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/368c22aea490f6f50df831b4f9e3623787686c5b 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/d552bcfca323d175664d7444989b04f55666978a 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis
© CVE.report 2026 |

Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. It is the responsibility of user to evaluate the accuracy, completeness or usefulness of any information, opinion, advice or other content. EACH USER WILL BE SOLELY RESPONSIBLE FOR ANY consequences of his or her direct or indirect use of this web site. ALL WARRANTIES OF ANY KIND ARE EXPRESSLY DISCLAIMED. This site will NOT BE LIABLE FOR ANY DIRECT, INDIRECT or any other kind of loss.

CVE, CWE, and OVAL are registred trademarks of The MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. This site includes MITRE data granted under the following license.

Free CVE JSON API cve.report/api

CVE.report and Source URL Uptime Status status.cve.report