In the Linux kernel, the following vulnerability has been resolved:
tcp: fix skb_copy_ubufs() vs BIG TCP
David Ahern reported crashes in skb_copy_ubufs() caused by TCP tx zerocopy
using hugepages, and skb length bigger than ~68 KB.
skb_copy_ubufs() assumed it could copy all payload using up to
MAX_SKB_FRAGS order-0 pages.
This assumption broke when BIG TCP was able to put up to 512 KB per skb.
We did not hit this bug at Google because we use CONFIG_MAX_SKB_FRAGS=45
and limit gso_max_size to 180000.
A solution is to use higher order pages if needed.
v2: add missing __GFP_COMP, or we leak memory.
References
Configurations
Configuration 1 (hide)
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History
03 Feb 2026, 19:08
| Type | Values Removed | Values Added |
|---|---|---|
| CPE | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | |
| CWE | CWE-401 | |
| First Time |
Linux linux Kernel
Linux |
|
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 5.5 |
| References | () https://git.kernel.org/stable/c/3c77a377877acbaf03cd7caa21d3644a5dd16301 - Patch | |
| References | () https://git.kernel.org/stable/c/7e692df3933628d974acb9f5b334d2b3e885e2a6 - Patch | |
| References | () https://git.kernel.org/stable/c/7fa93e39fbb0566019c388a8038a4d58552e0910 - Patch | |
| References | () https://git.kernel.org/stable/c/9cd62f0ba465cf647c7d8c2ca7b0d99ea0c1328f - Patch |
Information
Published : 2025-10-07 16:15
Updated : 2026-02-03 19:08
NVD link : CVE-2023-53669
Mitre link : CVE-2023-53669
CVE.ORG link : CVE-2023-53669
JSON object : View
Products Affected
linux
- linux_kernel
CWE
CWE-401
Missing Release of Memory after Effective Lifetime