Unscored severity · published Dec 6, 2025
CVE-2025-40278
net: sched: act_ife: initialize struct tc_ife to fix KMSAN kernel-infoleak
–
CVSS
0.2%
EPSS
No
On KEV
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.
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 12% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
LI
Linux · Linux
ef6980b6becb1afd9d82a4f043749a10ae81bf14 before 918e063304f945fb93be9bb70cacea07d0b730ea; ef6980b6becb1afd9d82a4f043749a10ae81bf14 before 5e3644ef147bf7140259dfa4cace680c9b26fe8b; ef6980b6becb1afd9d82a4f043749a10ae81bf14 before 37f0680887c5aeba9a433fe04b35169010568bb1; ef6980b6becb1afd9d82a4f043749a10ae81bf14 before 2191662058443e0bcc28d11694293d8339af6dde; ef6980b6becb1afd9d82a4f043749a10ae81bf14 before a676a296af65d33725bdf7396803180957dbd92e; ef6980b6becb1afd9d82a4f043749a10ae81bf14 before d1dbbbe839647486c9b893e5011fe84a052962df; +3 more · source: vendor
RR
RUGGEDCOM RST2428P · Siemens
before V4.0 · source: CISA
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-40278
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-40278
git.kernel.org
https://git.kernel.org/stable/c/2191662058443e0bcc28d11694293d8339af6dde
git.kernel.org
https://git.kernel.org/stable/c/37f0680887c5aeba9a433fe04b35169010568bb1
git.kernel.org
https://git.kernel.org/stable/c/5e3644ef147bf7140259dfa4cace680c9b26fe8b
git.kernel.org
https://git.kernel.org/stable/c/918e063304f945fb93be9bb70cacea07d0b730ea
git.kernel.org
https://git.kernel.org/stable/c/a676a296af65d33725bdf7396803180957dbd92e
git.kernel.org
https://git.kernel.org/stable/c/c8f51dad94cbb88054e2aacc272b3ce1ed11fb1e
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