CVE-2025-40278— net: sched: act_ife: initialize struct tc_ife to fix KMSAN kernel-infoleak
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I. Basic Information for CVE-2025-40278
Vulnerability Information
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Vulnerability Title
net: sched: act_ife: initialize struct tc_ife to fix KMSAN kernel-infoleak
Source: NVD (National Vulnerability Database)
Vulnerability 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.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于net sched act_ife未初始化结构体，可能导致内核信息泄露。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
II. Public POCs for CVE-2025-40278
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Same Patch Batch · Linux · 2025-12-06 · 23 CVEs total
| CVE-2025-40277 | drm/vmwgfx: Validate command header size against SVGA_CMD_MAX_DATASIZE | |
| CVE-2025-40267 | io_uring/rw: ensure allocated iovec gets cleared for early failure | |
| CVE-2025-40268 | cifs: client: fix memory leak in smb3_fs_context_parse_param | |
| CVE-2025-40269 | ALSA: usb-audio: Fix potential overflow of PCM transfer buffer | |
| CVE-2025-40270 | mm, swap: fix potential UAF issue for VMA readahead | |
| CVE-2025-40271 | fs/proc: fix uaf in proc_readdir_de() | |
| CVE-2025-40272 | mm/secretmem: fix use-after-free race in fault handler | |
| CVE-2025-40273 | NFSD: free copynotify stateid in nfs4_free_ol_stateid() | |
| CVE-2025-40274 | KVM: guest_memfd: Remove bindings on memslot deletion when gmem is dying | |
| CVE-2025-40275 | ALSA: usb-audio: Fix NULL pointer dereference in snd_usb_mixer_controls_badd | |
| CVE-2025-40276 | drm/panthor: Flush shmem writes before mapping buffers CPU-uncached | |
| CVE-2025-40289 | drm/amdgpu: hide VRAM sysfs attributes on GPUs without VRAM | |
| CVE-2025-40279 | net: sched: act_connmark: initialize struct tc_ife to fix kernel leak | |
| CVE-2025-40280 | tipc: Fix use-after-free in tipc_mon_reinit_self(). | |
| CVE-2025-40281 | sctp: prevent possible shift-out-of-bounds in sctp_transport_update_rto | |
| CVE-2025-40282 | Bluetooth: 6lowpan: reset link-local header on ipv6 recv path | |
| CVE-2025-40283 | Bluetooth: btusb: reorder cleanup in btusb_disconnect to avoid UAF | |
| CVE-2025-40284 | Bluetooth: MGMT: cancel mesh send timer when hdev removed | |
| CVE-2025-40285 | smb/server: fix possible refcount leak in smb2_sess_setup() | |
| CVE-2025-40286 | smb/server: fix possible memory leak in smb2_read() |
Showing top 20 of 23 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
Same product: Linux
- CVE-2026-43500
rxrpc: Also unshare DATA/RESPONSE packets when paged frags a - CVE-2026-43475
scsi: storvsc: Fix scheduling while atomic on PREEMPT_RT - CVE-2026-43474
fs: init flags_valid before calling vfs_fileattr_get - CVE-2026-43473
scsi: mpi3mr: Add NULL checks when resetting request and rep - CVE-2026-43472
unshare: fix unshare_fs() handling
Same vendor: Linux
- CVE-2026-43500
rxrpc: Also unshare DATA/RESPONSE packets when paged frags a - CVE-2026-43475
scsi: storvsc: Fix scheduling while atomic on PREEMPT_RT - CVE-2026-43474
fs: init flags_valid before calling vfs_fileattr_get - CVE-2026-43473
scsi: mpi3mr: Add NULL checks when resetting request and rep - CVE-2026-43472
unshare: fix unshare_fs() handling
V. Comments for CVE-2025-40278
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