CVE-2025-40278
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.
How to fix
- Linux Linux918e063304f945fb93be9bb70cacea07d0b730ea, 5e3644ef147bf7140259dfa4cace680c9b26fe8b, 37f0680887c5aeba9a433fe04b35169010568bb1, 2191662058443e0bcc28d11694293d8339af6dde, a676a296af65d33725bdf7396803180957dbd92e, d1dbbbe839647486c9b893e5011fe84a052962df, c8f51dad94cbb88054e2aacc272b3ce1ed11fb1e, ce50039be49eea9b4cd8873ca6eccded1b4a130a or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Linux Linux | ef6980b6becb1afd9d82a4f043749a10ae81bf14 ≤ v < 918e063304f945fb93be9bb70cacea07d0b730ea, ef6980b6becb1afd9d82a4f043749a10ae81bf14 ≤ v < 5e3644ef147bf7140259dfa4cace680c9b26fe8b, ef6980b6becb1afd9d82a4f043749a10ae81bf14 ≤ v < 37f0680887c5aeba9a433fe04b35169010568bb1, ef6980b6becb1afd9d82a4f043749a10ae81bf14 ≤ v < 2191662058443e0bcc28d11694293d8339af6dde, ef6980b6becb1afd9d82a4f043749a10ae81bf14 ≤ v < a676a296af65d33725bdf7396803180957dbd92e, ef6980b6becb1afd9d82a4f043749a10ae81bf14 ≤ v < d1dbbbe839647486c9b893e5011fe84a052962df, ef6980b6becb1afd9d82a4f043749a10ae81bf14 ≤ v < c8f51dad94cbb88054e2aacc272b3ce1ed11fb1e, ef6980b6becb1afd9d82a4f043749a10ae81bf14 ≤ v < ce50039be49eea9b4cd8873ca6eccded1b4a130a, 4.6 | 918e063304f945fb93be9bb70cacea07d0b730ea, 5e3644ef147bf7140259dfa4cace680c9b26fe8b, 37f0680887c5aeba9a433fe04b35169010568bb1, 2191662058443e0bcc28d11694293d8339af6dde, a676a296af65d33725bdf7396803180957dbd92e, d1dbbbe839647486c9b893e5011fe84a052962df, c8f51dad94cbb88054e2aacc272b3ce1ed11fb1e, ce50039be49eea9b4cd8873ca6eccded1b4a130a |
Check your version
Choose the product and enter the version you run to see whether it falls in the affected range.
Attack Surface Management
See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.