CVE-2026-43373— net: ncsi: fix skb leak in error paths
Possible ATT&CK Techniques 1AI
T1499.002 · Service Exhaustion FloodAffected Version Matrix 18
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Linux | Linux | 138635cc27c9737f940c3aa80912ff7a61c825af< 9891d7f4f1ede473c54b49776ae07755083eef06 | affected |
138635cc27c9737f940c3aa80912ff7a61c825af< fef5aa6e3bcf3c8053307642663a63b7362d7552 | affected | ||
138635cc27c9737f940c3aa80912ff7a61c825af< 81d6aee32f8f7bbc175c05dbf61f4430bfb88c4a | affected | ||
138635cc27c9737f940c3aa80912ff7a61c825af< 59962588197863d0d746879f193905c0c6b3df49 | affected | ||
138635cc27c9737f940c3aa80912ff7a61c825af< 553366c271479c0d571dd1bb5d1bcde4747fb82e | affected | ||
138635cc27c9737f940c3aa80912ff7a61c825af< b70c4e5e711931cdd56e6e905737b72f1e649189 | affected | ||
138635cc27c9737f940c3aa80912ff7a61c825af< 87138dde2d6937b12b967f28fe598a7d59000ae4 | affected | ||
138635cc27c9737f940c3aa80912ff7a61c825af< 5c3398a54266541610c8d0a7082e654e9ff3e259 | affected | ||
| … +10 more rows | |||
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I. Basic Information for CVE-2026-43373
Vulnerability Information
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Vulnerability Title
net: ncsi: fix skb leak in error paths
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: net: ncsi: fix skb leak in error paths Early return paths in NCSI RX and AEN handlers fail to release the received skb, resulting in a memory leak. Specifically, ncsi_aen_handler() returns on invalid AEN packets without consuming the skb. Similarly, ncsi_rcv_rsp() exits early when failing to resolve the NCSI device, response handler, or request, leaving the skb unfreed.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
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NCSI RX和AEN处理程序中早期返回路径未能释放接收到的skb，导致内存泄漏。
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-2026-43373
| # | POC Description | Source Link | Shenlong Link |
|---|
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Patches & Fixes for CVE-2026-43373 (8)
Same Patch Batch · Linux · 2026-05-08 · 199 CVEs total
| CVE-2026-43304 | 9.8 CRITICAL | libceph: define and enforce CEPH_MAX_KEY_LEN |
| CVE-2026-43341 | 9.8 CRITICAL | net/ipv6: ioam6: prevent schema length wraparound in trace fill |
| CVE-2026-43376 | 9.8 CRITICAL | ksmbd: fix use-after-free by using call_rcu() for oplock_info |
| CVE-2026-43378 | 9.8 CRITICAL | smb: server: fix use-after-free in smb2_open() |
| CVE-2026-43379 | 9.8 CRITICAL | ksmbd: fix use-after-free in smb_lazy_parent_lease_break_close() |
| CVE-2026-43384 | 9.8 CRITICAL | net/tcp-ao: Fix MAC comparison to be constant-time |
| CVE-2026-43465 | 9.8 CRITICAL | net/mlx5e: RX, Fix XDP multi-buf frag counting for striding RQ |
| CVE-2026-43402 | 9.8 CRITICAL | kthread: consolidate kthread exit paths to prevent use-after-free |
| CVE-2026-43414 | 9.8 CRITICAL | scsi: qla2xxx: Completely fix fcport double free |
| CVE-2026-43383 | 9.4 CRITICAL | net/tcp-md5: Fix MAC comparison to be constant-time |
| CVE-2026-43406 | 9.1 CRITICAL | libceph: prevent potential out-of-bounds reads in process_message_header() |
| CVE-2026-43407 | 9.1 CRITICAL | libceph: Fix potential out-of-bounds access in ceph_handle_auth_reply() |
| CVE-2026-43284 | 8.8 HIGH | xfrm: esp: avoid in-place decrypt on shared skb frags |
| CVE-2026-43322 | 8.8 HIGH | Bluetooth: hci_sync: Fix UAF in le_read_features_complete |
| CVE-2026-43334 | 8.8 HIGH | Bluetooth: SMP: force responder MITM requirements before building the pairing response |
| CVE-2026-43391 | 8.8 HIGH | nsfs: tighten permission checks for handle opening |
| CVE-2026-43403 | 8.8 HIGH | nsfs: tighten permission checks for ns iteration ioctls |
| CVE-2026-43291 | 8.3 HIGH | net: nfc: nci: Fix parameter validation for packet data |
| CVE-2026-43365 | 8.2 HIGH | xfs: fix undersized l_iclog_roundoff values |
| CVE-2026-43452 | 8.2 HIGH | netfilter: x_tables: guard option walkers against 1-byte tail reads |
Showing top 20 of 199 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
Same product: Linux
- CVE-2026-46241
spi: mpc52xx: fix use-after-free on registration failure - CVE-2026-46239
media: i2c: ov5647: Fix runtime PM refcount leak in s_ctrl - CVE-2026-46240
media: iris: Fix use-after-free in iris_release_internal_buf - CVE-2026-46238
batman-adv: stop caching unowned originator pointers in BAT - CVE-2026-46237
drm/amdgpu/vcn3: Avoid overflow on msg bound check
Same vendor: Linux
- CVE-2026-46241
spi: mpc52xx: fix use-after-free on registration failure - CVE-2026-46239
media: i2c: ov5647: Fix runtime PM refcount leak in s_ctrl - CVE-2026-46240
media: iris: Fix use-after-free in iris_release_internal_buf - CVE-2026-46238
batman-adv: stop caching unowned originator pointers in BAT - CVE-2026-46237
drm/amdgpu/vcn3: Avoid overflow on msg bound check
V. Comments for CVE-2026-43373
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