CVE-2025-40279— net: sched: act_connmark: initialize struct tc_ife to fix kernel leak
Possible ATT&CK Techniques 1AI
T1059.004 · Unix ShellAffected Version Matrix 14
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Linux | Linux | 22a5dc0e5e3e8fef804230cd73ed7b0afd4c7bae< 218b67c8c8246d47a2a7910eae80abe4861fe2b7 | affected |
22a5dc0e5e3e8fef804230cd73ed7b0afd4c7bae< 73cc56c608c209d3d666cc571293b090a471da70 | affected | ||
22a5dc0e5e3e8fef804230cd73ed7b0afd4c7bae< 31e4aa93e2e5b5647fc235b0f6ee329646878f9e | affected | ||
22a5dc0e5e3e8fef804230cd73ed7b0afd4c7bae< 51cb05d4fd632596816ba44e882e84db9fb28a7e | affected | ||
22a5dc0e5e3e8fef804230cd73ed7b0afd4c7bae< 25837889ec062f2b7618142cd80253dff3da5343 | affected | ||
22a5dc0e5e3e8fef804230cd73ed7b0afd4c7bae< 62b656e43eaeae445a39cd8021a4f47065af4389 | affected | ||
4.0 | affected | ||
< 4.0 | unaffected | ||
| … +6 more rows | |||
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I. Basic Information for CVE-2025-40279
Vulnerability Information
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Vulnerability Title
net: sched: act_connmark: initialize struct tc_ife to fix kernel leak
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: net: sched: act_connmark: initialize struct tc_ife to fix kernel leak In tcf_connmark_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.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
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_connmark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-2025-40279
| # | POC Description | Source Link | Shenlong Link |
|---|
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No public POC found.
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Same Patch Batch · Linux · 2025-12-06 · 23 CVEs total
| CVE-2025-40282 | 8.8 HIGH | Bluetooth: 6lowpan: reset link-local header on ipv6 recv path |
| CVE-2025-40273 | 8.8 HIGH | NFSD: free copynotify stateid in nfs4_free_ol_stateid() |
| CVE-2025-40269 | 7.8 HIGH | ALSA: usb-audio: Fix potential overflow of PCM transfer buffer |
| CVE-2025-40284 | 7.8 HIGH | Bluetooth: MGMT: cancel mesh send timer when hdev removed |
| CVE-2025-40283 | 7.8 HIGH | Bluetooth: btusb: reorder cleanup in btusb_disconnect to avoid UAF |
| CVE-2025-40270 | 7.8 HIGH | mm, swap: fix potential UAF issue for VMA readahead |
| CVE-2025-40280 | 7.8 HIGH | tipc: Fix use-after-free in tipc_mon_reinit_self(). |
| CVE-2025-40271 | 7.8 HIGH | fs/proc: fix uaf in proc_readdir_de() |
| CVE-2025-40277 | 7.8 HIGH | drm/vmwgfx: Validate command header size against SVGA_CMD_MAX_DATASIZE |
| CVE-2025-40272 | 7.8 HIGH | mm/secretmem: fix use-after-free race in fault handler |
| CVE-2025-40274 | 7.8 HIGH | KVM: guest_memfd: Remove bindings on memslot deletion when gmem is dying |
| CVE-2025-40285 | 7.5 HIGH | smb/server: fix possible refcount leak in smb2_sess_setup() |
| CVE-2025-40276 | 7.3 HIGH | drm/panthor: Flush shmem writes before mapping buffers CPU-uncached |
| CVE-2025-40267 | io_uring/rw: ensure allocated iovec gets cleared for early failure | |
| CVE-2025-40289 | drm/amdgpu: hide VRAM sysfs attributes on GPUs without VRAM | |
| CVE-2025-40268 | cifs: client: fix memory leak in smb3_fs_context_parse_param | |
| CVE-2025-40275 | ALSA: usb-audio: Fix NULL pointer dereference in snd_usb_mixer_controls_badd | |
| CVE-2025-40278 | net: sched: act_ife: initialize struct tc_ife to fix KMSAN kernel-infoleak | |
| CVE-2025-40281 | sctp: prevent possible shift-out-of-bounds in sctp_transport_update_rto | |
| 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-2026-74579
netfilter: nft_payload: fix mask build for partial field off - CVE-2026-74578
crypto: algif_skcipher - force synchronous processing on tre - CVE-2026-74577
net: mpls: initialize rtm_tos in mpls_getroute() - CVE-2026-74576
mm/slab: prevent unbounded recursion in free path with new k - CVE-2026-74574
dmaengine: idxd: fix fdev setup failure cleanup in idxd_cdev
Same vendor: Linux
- CVE-2026-74579
netfilter: nft_payload: fix mask build for partial field off - CVE-2026-74578
crypto: algif_skcipher - force synchronous processing on tre - CVE-2026-74577
net: mpls: initialize rtm_tos in mpls_getroute() - CVE-2026-74576
mm/slab: prevent unbounded recursion in free path with new k - CVE-2026-74574
dmaengine: idxd: fix fdev setup failure cleanup in idxd_cdev
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