VDB

DEBIAN-CVE-2025-40278

DEBIAN-CVE-2025-40278 PUBLISHED CVSS 8.800000190734863 HIGH

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.

Risk Scores

CVSS v4.0
8.800000190734863
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:H/SC:N/SI:N/SA:N

Affected Products

VendorProductVersions
Debian:11linux-6.16.1.129-1, 6.1.106-3, 6.1.106-3
Debian:13linux6.12.57-1, 6.12.63-1, 6.12.57-1
Debian:12linux6.1.148-1, 6.1.153-1, 6.1.158-1
Debian:14linux6.14.6-1, 6.12.38-1, 6.12.41-1
Debian:11linux5.10.223-1, 5.10.226-1, 5.10.234-1

Timeline

  • Dec 6, 2025 CVE Published
  • Apr 28, 2026 CVE Updated
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