cbcvebase.
CVE-2025-40278
published 2025-12-06

CVE-2025-40278: 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…

PriorityP420high7.8
EPSS
0.21%
11.7th percentile
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.

Affected

30 ranges· showing 25
VendorProductVersion rangeFixed in
debianlinux< linux 6.1.159-1 (bookworm)linux 6.1.159-1 (bookworm)
debianlinux-6.1< linux 6.1.159-1 (bookworm)linux 6.1.159-1 (bookworm)
linuxlinux
linuxlinux>= ef6980b6becb1afd9d82a4f043749a10ae81bf14 < 918e063304f945fb93be9bb70cacea07d0b730ea918e063304f945fb93be9bb70cacea07d0b730ea
linuxlinux>= ef6980b6becb1afd9d82a4f043749a10ae81bf14 < 5e3644ef147bf7140259dfa4cace680c9b26fe8b5e3644ef147bf7140259dfa4cace680c9b26fe8b
linuxlinux>= ef6980b6becb1afd9d82a4f043749a10ae81bf14 < 37f0680887c5aeba9a433fe04b35169010568bb137f0680887c5aeba9a433fe04b35169010568bb1
linuxlinux>= ef6980b6becb1afd9d82a4f043749a10ae81bf14 < 2191662058443e0bcc28d11694293d8339af6dde2191662058443e0bcc28d11694293d8339af6dde
linuxlinux>= ef6980b6becb1afd9d82a4f043749a10ae81bf14 < a676a296af65d33725bdf7396803180957dbd92ea676a296af65d33725bdf7396803180957dbd92e
linuxlinux>= ef6980b6becb1afd9d82a4f043749a10ae81bf14 < d1dbbbe839647486c9b893e5011fe84a052962dfd1dbbbe839647486c9b893e5011fe84a052962df
linuxlinux>= ef6980b6becb1afd9d82a4f043749a10ae81bf14 < c8f51dad94cbb88054e2aacc272b3ce1ed11fb1ec8f51dad94cbb88054e2aacc272b3ce1ed11fb1e
linuxlinux>= ef6980b6becb1afd9d82a4f043749a10ae81bf14 < ce50039be49eea9b4cd8873ca6eccded1b4a130ace50039be49eea9b4cd8873ca6eccded1b4a130a
linuxlinux_kernel>= 0 < 5.10.247-15.10.247-1
linuxlinux_kernel>= 0 < 6.1.159-16.1.159-1
linuxlinux_kernel>= 0 < 6.12.63-16.12.63-1
linuxlinux_kernel>= 0 < 6.17.9-16.17.9-1
linuxlinux_kernel>= 0 < 5.15.0-173.1835.15.0-173.183
linuxlinux_kernel>= 0 < 6.8.0-106.1066.8.0-106.106
linuxlinux_kernel>= 0 < 6.17.0-14.146.17.0-14.14
linuxlinux_kernel>= 4.6.0 < 5.4.3025.4.302
linuxlinux_kernel>= 5.11.0 < 5.15.1975.15.197
linuxlinux_kernel>= 5.16.0 < 6.1.1596.1.159
linuxlinux_kernel>= 5.5.0 < 5.10.2475.10.247
linuxlinux_kernel>= 6.13.0 < 6.17.96.17.9
linuxlinux_kernel>= 6.2.0 < 6.6.1176.6.117
linuxlinux_kernel>= 6.7.0 < 6.12.596.12.59

CVSS provenance

osv7.8HIGH
vendor_ubuntu7.8HIGH
vendor_msrc5.5MEDIUM
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