Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1336 CNY

100%
Buy Us a Coffee

CVE-2026-74678— net: usb: ax88179_178a: fix skb leak in ax88179_tx_fixup()

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

在 Linux 内核中，已修复以下漏洞： 网络：USB：ax88179_178a：修复 ax88179_tx_fixup() 中的 skb 内存泄漏 当接口启用了 （散射/聚集功能）且 中调用 失败时，该函数会返回 NULL，但未释放传入的 （套接字缓冲区）。 将来自 的 NULL 返回值视为丢包处理（由于该驱动未设置 标志），从而跳转到 “drop” 标签处，执行 。由于 返回了 NULL， 中的局部变量 为 NULL，因此原始的 从未被释放——每当线性化失败时（例如在内存压力较大的情况下），就会发生内存泄漏。

CVSS 7.5 · High EPSS 0.48% · P39

Affected Version Matrix 14

VendorProduct Version RangeStatus
Linux Linux 16b1c4e01c89ba07367461e0bc4cb84993c2d027< 83a765cbd7b4d11b0b9fa1bb9d941ae911a2159b affected
16b1c4e01c89ba07367461e0bc4cb84993c2d027< 1c63303659a2264bd55d9813df74cb4caeed5922 affected
16b1c4e01c89ba07367461e0bc4cb84993c2d027< 2be5091fa693b9119ad25a8bb8c149d236a23ade affected
16b1c4e01c89ba07367461e0bc4cb84993c2d027< 58733b1dd46bb231d9d279c132a20ee46da1b664 affected
16b1c4e01c89ba07367461e0bc4cb84993c2d027< 4039cd807a5a46dc5f7618fffae926b8ad8455eb affected
16b1c4e01c89ba07367461e0bc4cb84993c2d027< 1f428e30947395d9b9aacee03e25a4e6cfcad7a4 affected
5.17 affected
< 5.17 unaffected
… +6 more rows
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-74678

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
net: usb: ax88179_178a: fix skb leak in ax88179_tx_fixup()
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: net: usb: ax88179_178a: fix skb leak in ax88179_tx_fixup() When the interface has NETIF_F_SG enabled and skb_linearize() fails in ax88179_tx_fixup(), the function returns NULL without freeing the skb. usbnet_start_xmit() treats a NULL return from tx_fixup() as a drop (info->flags does not set FLAG_MULTI_PACKET for this driver), jumping to the "drop" label where it does `if (skb) dev_kfree_skb_any(skb)`. Because tx_fixup() returned NULL, the local skb variable in usbnet_start_xmit() is NULL, so the original skb is never freed — a memory leak on every TX frame whose linearization fails (i.e. under memory pressure). Free the skb before returning, matching the error handling already used for the pskb_expand_head() failure path in the same function.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux 16b1c4e01c89ba07367461e0bc4cb84993c2d027 ~ 83a765cbd7b4d11b0b9fa1bb9d941ae911a2159b -
Linux Linux 5.17 -

II. Public POCs for CVE-2026-74678

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-74678

请登录查看更多情报信息。

Patches & Fixes for CVE-2026-74678 (6)

Same Patch Batch · Linux · 2026-08-22 · 150 CVEs total

CVE-2026-74705 10.0 CRITICAL udp: fix potential use-after-free in tunnel segmentation
CVE-2026-74612 10.0 CRITICAL veth: fix skb length accounting after XDP frag adjustment
CVE-2026-74616 9.8 CRITICAL xdp: reject clones that overrun skb_shared_info tailroom
CVE-2026-74617 9.8 CRITICAL dibs: initialise dibs->lock in dibs_dev_alloc()
CVE-2026-74597 9.8 CRITICAL ip6_tunnel: clear skb2->cb[] in ip6ip6_err()
CVE-2026-74688 9.8 CRITICAL sctp: clear control chunk transport if it is being removed
CVE-2026-74608 9.8 CRITICAL smb: client: Fix use-after-free in cifs_try_adding_channels()
CVE-2026-74669 9.8 CRITICAL ipvs: clear IPv4 options after rebasing tunnel ICMP errors
CVE-2026-74662 9.8 CRITICAL inet: frags: publish queues before arming timer
CVE-2026-74591 9.8 CRITICAL mm/filemap: __filemap_add_folio() restore index before retrying
CVE-2026-74628 9.8 CRITICAL net/x25: fix use-after-free of the socket by its timers
CVE-2026-74587 9.8 CRITICAL sctp: fix use-after-free of cached ASCONF chunk
CVE-2026-74588 9.8 CRITICAL sctp: keep chunk->transport in step with the list it is queued on
CVE-2026-74586 9.8 CRITICAL sctp: clear new_transport when removing a peer
CVE-2026-74611 9.8 CRITICAL tls: rx: restore msg_iter before TLS 1.3 optimistic retry
CVE-2026-74723 9.8 CRITICAL btrfs: lzo: reject inline extents without valid headers
CVE-2026-74727 9.8 CRITICAL ovpn: skip rehash for peers already removed from by_id
CVE-2026-74730 9.8 CRITICAL NFS: Pin the 'struct nfs_server' during a FREE_STATEID call
CVE-2026-74712 9.3 CRITICAL vdpa/mlx5: Fix buffer length in create_direct_keys()
CVE-2026-74665 9.1 CRITICAL net: fix skb length accounting after generic XDP frag adjustment

Showing top 20 of 150 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-74678

No comments yet

Leave a comment