In the Linux kernel, the following vulnerability has been resolved:
bpf, sockmap: Fix repeated calls to sock_put() when msg has more_data
In tcp_bpf_send_verdict() redirection, the eval variable is assigned to
__SK_REDIRECT after the apply_bytes data is sent, if msg has more_data,
sock_put() will be called multiple times.
We should reset the eval variable to __SK_NONE every time more_data
starts.
This causes:
IPv4: Attempt to release TCP socket in state 1 00000000b4c925d7
------------[ cut here ]------------
refcount_t: addition on 0; use-after-free.
WARNING: CPU: 5 PID: 4482 at lib/refcount.c:25 refcount_warn_saturate+0x7d/0x110
Modules linked in:
CPU: 5 PID: 4482 Comm: sockhash_bypass Kdump: loaded Not tainted 6.0.0 #1
Hardware name: Red Hat KVM, BIOS 1.11.0-2.el7 04/01/2014
Call Trace:
<TASK>
__tcp_transmit_skb+0xa1b/0xb90
? __alloc_skb+0x8c/0x1a0
? __kmalloc_node_track_caller+0x184/0x320
tcp_write_xmit+0x22a/0x1110
__tcp_push_pending_frames+0x32/0xf0
do_tcp_sendpages+0x62d/0x640
tcp_bpf_push+0xae/0x2c0
tcp_bpf_sendmsg_redir+0x260/0x410
? preempt_count_add+0x70/0xa0
tcp_bpf_send_verdict+0x386/0x4b0
tcp_bpf_sendmsg+0x21b/0x3b0
sock_sendmsg+0x58/0x70
__sys_sendto+0xfa/0x170
? xfd_validate_state+0x1d/0x80
? switch_fpu_return+0x59/0xe0
__x64_sys_sendto+0x24/0x30
do_syscall_64+0x37/0x90
entry_SYSCALL_64_after_hwframe+0x63/0xcd
References
Configurations
Configuration 1 (hide)
|
History
04 Feb 2026, 18:15
| Type | Values Removed | Values Added |
|---|---|---|
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 7.8 |
| CWE | CWE-415 | |
| CPE | cpe:2.3:o:linux:linux_kernel:5.15:-:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
|
| First Time |
Linux
Linux linux Kernel |
|
| References | () https://git.kernel.org/stable/c/113236e8f49f262f318c00ebb14b15f4834e87c1 - Patch | |
| References | () https://git.kernel.org/stable/c/28e4a763cd4a2b1a78852216ef4bd7df3a05cec6 - Patch | |
| References | () https://git.kernel.org/stable/c/578a7628b838a3ac8ad61deaab5a816ff032ac13 - Patch | |
| References | () https://git.kernel.org/stable/c/7508b9f4daac4ec7dfe0b6fb2d688b1c1c105e10 - Patch | |
| References | () https://git.kernel.org/stable/c/7a9841ca025275b5b0edfb0b618934abb6ceec15 - Patch | |
| References | () https://git.kernel.org/stable/c/8786bde11a4f31b63b3036731df0b47337a7a245 - Patch |
07 Oct 2025, 16:15
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2025-10-07 16:15
Updated : 2026-02-04 18:15
NVD link : CVE-2022-50536
Mitre link : CVE-2022-50536
CVE.ORG link : CVE-2022-50536
JSON object : View
Products Affected
linux
- linux_kernel
CWE
CWE-415
Double Free