In the Linux kernel, the following vulnerability has been resolved: net: sched: act_ife: initialize struct tc_ife to fix KMSAN kernel-infoleak Fix a KMSAN kernel-infoleak detected by the syzbot . [net?] KMSAN: kernel-infoleak in __skb_datagram_iter In tcf_ife_dump(), the variable 'opt' was partially initialized using a designatied initializer. While the padding bytes are reamined uninitialized. nla_put() copies the entire structure into a netlink message, these uninitialized bytes leaked to userspace. Initialize the structure with memset before assigning its fields to ensure all members and padding are cleared prior to beign copied. This change silences the KMSAN report and prevents potential information leaks from the kernel memory. This fix has been tested and validated by syzbot. This patch closes the bug reported at the following syzkaller link and ensures no infoleak.

Metrics

No CVSS v4.0

No CVSS v3.1

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Key SSVC decision points have not yet been added.

Affected Vendors & Products

Vendors Products
Linux
  • Linux Kernel

No data.

No data.

References
Link Providers
https://git.kernel.org/stable/c/2191662058443e0bcc28d11694293d8339af6dde cve-icon cve-icon
https://git.kernel.org/stable/c/37f0680887c5aeba9a433fe04b35169010568bb1 cve-icon cve-icon
https://git.kernel.org/stable/c/5e3644ef147bf7140259dfa4cace680c9b26fe8b cve-icon cve-icon
https://git.kernel.org/stable/c/918e063304f945fb93be9bb70cacea07d0b730ea cve-icon cve-icon
https://git.kernel.org/stable/c/a676a296af65d33725bdf7396803180957dbd92e cve-icon cve-icon
https://git.kernel.org/stable/c/c8f51dad94cbb88054e2aacc272b3ce1ed11fb1e cve-icon cve-icon
https://git.kernel.org/stable/c/ce50039be49eea9b4cd8873ca6eccded1b4a130a cve-icon cve-icon
https://git.kernel.org/stable/c/d1dbbbe839647486c9b893e5011fe84a052962df cve-icon cve-icon
History

Sat, 06 Dec 2025 22:00:00 +0000

Type Values Removed Values Added
Description In the Linux kernel, the following vulnerability has been resolved: net: sched: act_ife: initialize struct tc_ife to fix KMSAN kernel-infoleak Fix a KMSAN kernel-infoleak detected by the syzbot . [net?] KMSAN: kernel-infoleak in __skb_datagram_iter In tcf_ife_dump(), the variable 'opt' was partially initialized using a designatied initializer. While the padding bytes are reamined uninitialized. nla_put() copies the entire structure into a netlink message, these uninitialized bytes leaked to userspace. Initialize the structure with memset before assigning its fields to ensure all members and padding are cleared prior to beign copied. This change silences the KMSAN report and prevents potential information leaks from the kernel memory. This fix has been tested and validated by syzbot. This patch closes the bug reported at the following syzkaller link and ensures no infoleak.
Title net: sched: act_ife: initialize struct tc_ife to fix KMSAN kernel-infoleak
First Time appeared Linux
Linux linux Kernel
CPEs cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Vendors & Products Linux
Linux linux Kernel
References
cve-icon MITRE

Status: PUBLISHED

Assigner: Linux

Published: 2025-12-06T21:51:01.693Z

Updated: 2025-12-06T21:51:01.693Z

Reserved: 2025-04-16T07:20:57.184Z

Link: CVE-2025-40278

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2025-12-06T22:15:55.700

Modified: 2025-12-06T22:15:55.700

Link: CVE-2025-40278

cve-icon Redhat

No data.