In the Linux kernel, the following vulnerability has been resolved:
vsock/vmci: fix sk_ack_backlog leak on failed handshake
When vmci_transport_recv_connecting_server() returns an error,
vmci_transport_recv_listen() calls vsock_remove_pending() but never
calls sk_acceptq_removed(). This leaves sk_ack_backlog incremented
permanently.
Repeated handshake failures (malformed packets, queue pair alloc
failure, event subscribe failure) cause sk_ack_backlog to climb
toward sk_max_ack_backlog. Once it reaches the limit the listener
permanently refuses all new connections with -ECONNREFUSED, a
silent denial of service requiring a process restart to recover.
The two existing sk_acceptq_removed() calls in af_vsock.c do not
cover this path: line 764 checks vsock_is_pending() which returns
false after vsock_remove_pending(), and line 1889 is only reached
on successful accept().
Fix by balancing sk_acceptq_added() with sk_acceptq_removed() on
the error path.
References
Configurations
Configuration 1 (hide)
|
History
06 Jul 2026, 12:43
| Type | Values Removed | Values Added |
|---|---|---|
| CPE | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:7.1:rc2:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:7.1:rc3:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:7.1:rc1:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:7.1:rc5:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:7.1:rc4:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:7.1:rc6:*:*:*:*:*:* |
|
| First Time |
Linux linux Kernel
Linux |
|
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 5.5 |
| References | () https://git.kernel.org/stable/c/22c587aa3ab1ab5264daff3ec32136fd30436c13 - Patch | |
| References | () https://git.kernel.org/stable/c/9698582a4dd9c4a05889d7db96d4c0edc9e69cac - Patch | |
| References | () https://git.kernel.org/stable/c/ba9ad6015937a5e46ba1a31370e3efdec8abbdcc - Patch | |
| References | () https://git.kernel.org/stable/c/bcb275626055df7f8f947f1a349754b4004d9a15 - Patch | |
| References | () https://git.kernel.org/stable/c/c05fa14db43ebef3bd862ca9d073981c0358b3f0 - Patch | |
| References | () https://git.kernel.org/stable/c/cf7090e255d74c4b61c51f8ede9fcacdd8393b5b - Patch | |
| References | () https://git.kernel.org/stable/c/dfd853197615d322d3a88dbcab91fc0fd2096219 - Patch | |
| References | () https://git.kernel.org/stable/c/ea0b03d52881c12a8c634ea0d6cbfa61cefdb488 - Patch | |
| CWE | CWE-401 |
25 Jun 2026, 09:16
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2026-06-25 09:16
Updated : 2026-07-06 12:43
NVD link : CVE-2026-53181
Mitre link : CVE-2026-53181
CVE.ORG link : CVE-2026-53181
JSON object : View
Products Affected
linux
- linux_kernel
CWE
CWE-401
Missing Release of Memory after Effective Lifetime