CVE-2022-49877None▾ Sunlit

bpf, sockmap: Fix the sk->sk_forward_alloc warning of sk_stream_kill_queues

In the Linux kernel, the following vulnerability has been resolved: bpf, sockmap: Fix the sk->sk_forward_alloc warning of sk_stream_kill_queues When running `test_sockmap` selftests, the following warning appears: WARNING: CPU: 2 PI…

▾ Sunlit zone — Low / medium · no exploitation signal

Depth score3/ 100 · Minimal

impact 2.8 · likelihood 0 · exploitation 0

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Proof of concept

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Published

May 1, 2025

Updated

Nov 5, 2026

CVSS

—

Vendor

Linux

Product

Linux

CWE

—

Depth score

3 · Minimal

EPSS

0.20% · p10

Platforms

—

Source

CVEORG

Vector

—

CISA SSVC

decided 2026-11-05

Exploitation: none
Automatable: no
Technical impact: partial

Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake.

EPSS history

Exploit-prediction probability, daily snapshots since Nov 5.

0.2% → 0.2%

Timeline

Disclosure to exploitation, from the record and what we observed since indexing it.

3 events · 553 days

May 1, 2025Published
Disclosed via CVEORG
Nov 5, 2026Record revised
Last analysed / modified upstream
Nov 5, 2026EPSS first tracked
0.2%

Linux #cve.org

Affected

Linux >= 244ce90c8d0bd10ebf957da02c6f3fcd5d920bdf < d975bec1eaeb52341acc9273db79ddb078220399
Linux >= 7b812a369e6416ab06d83cdd39d8e3f752781dd0 < cc21dc48a78cc9e5af9a4d039cd456446a6e73ff
Linux >= 168ff181f5b6e7fce684c98a30d35da1dbf8f82a < 95adbd2ac8de82e43fd6b347e7e1b47f74dc1abb
Linux >= 84472b436e760ba439e1969a9e3c5ae7c86de39d < 14e8bc3bf7bd6af64d7538a0684c8238d96cdfd7
Linux >= 84472b436e760ba439e1969a9e3c5ae7c86de39d < 8ec95b94716a1e4d126edc3fb2bc426a717e2dba
Linux 87d532d41ef937e16f61b3d2094f3a2ac49be365
Linux abb4caa477a5450817d2aa1198edce66450aecf8
Linux >= 5.4.189 < 5.4.225
Linux >= 5.10.110 < 5.10.155
Linux >= 5.15.33 < 5.15.79
Linux >= 5.16.19 < 5.17
Linux >= 5.17.2 < 5.18
Linux 5.18

Full technical detail▾

Overview

In the Linux kernel, the following vulnerability has been resolved:

bpf, sockmap: Fix the sk->sk_forward_alloc warning of sk_stream_kill_queues

When running test_sockmap selftests, the following warning appears:

WARNING: CPU: 2 PID: 197 at net/core/stream.c:205 sk_stream_kill_queues+0xd3/0xf0 Call Trace: <TASK> inet_csk_destroy_sock+0x55/0x110 tcp_rcv_state_process+0xd28/0x1380 ? tcp_v4_do_rcv+0x77/0x2c0 tcp_v4_do_rcv+0x77/0x2c0 __release_sock+0x106/0x130 __tcp_close+0x1a7/0x4e0 tcp_close+0x20/0x70 inet_release+0x3c/0x80 __sock_release+0x3a/0xb0 sock_close+0x14/0x20 __fput+0xa3/0x260 task_work_run+0x59/0xb0 exit_to_user_mode_prepare+0x1b3/0x1c0 syscall_exit_to_user_mode+0x19/0x50 do_syscall_64+0x48/0x90 entry_SYSCALL_64_after_hwframe+0x44/0xae

The root case is in commit 84472b436e76 ("bpf, sockmap: Fix more uncharged while msg has more_data"), where I used msg->sg.size to replace the tosend, causing breakage:

if (msg->apply_bytes && msg->apply_bytes < tosend) tosend = psock->apply_bytes;

Affected

Linux >= 244ce90c8d0bd10ebf957da02c6f3fcd5d920bdf < d975bec1eaeb52341acc9273db79ddb078220399
Linux >= 7b812a369e6416ab06d83cdd39d8e3f752781dd0 < cc21dc48a78cc9e5af9a4d039cd456446a6e73ff
Linux >= 168ff181f5b6e7fce684c98a30d35da1dbf8f82a < 95adbd2ac8de82e43fd6b347e7e1b47f74dc1abb
Linux >= 84472b436e760ba439e1969a9e3c5ae7c86de39d < 14e8bc3bf7bd6af64d7538a0684c8238d96cdfd7
Linux >= 84472b436e760ba439e1969a9e3c5ae7c86de39d < 8ec95b94716a1e4d126edc3fb2bc426a717e2dba
Linux 87d532d41ef937e16f61b3d2094f3a2ac49be365
Linux abb4caa477a5450817d2aa1198edce66450aecf8
Linux >= 5.4.189 < 5.4.225
Linux >= 5.10.110 < 5.10.155
Linux >= 5.15.33 < 5.15.79
Linux >= 5.16.19 < 5.17
Linux >= 5.17.2 < 5.18
Linux 5.18

Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

References

Related vulnerabilities

Connected by shared product, vendor, weakness, or advisory.

#cve.org

bpf, sockmap: Fix the sk->sk_forward_alloc warning of sk_stream_kill_queues

▾ Sunlit zone — Low / medium · no exploitation signal

Depth score3/ 100 · Minimal

impact 2.8 · likelihood 0 · exploitation 0

Overview

In the Linux kernel, the following vulnerability has been resolved:

bpf, sockmap: Fix the sk->sk_forward_alloc warning of sk_stream_kill_queues

When running test_sockmap selftests, the following warning appears:

The root case is in commit 84472b436e76 ("bpf, sockmap: Fix more uncharged while msg has more_data"), where I used msg->sg.size to replace the tosend, causing breakage:

if (msg->apply_bytes && msg->apply_bytes < tosend) tosend = psock->apply_bytes;

Affected

Linux >= 244ce90c8d0bd10ebf957da02c6f3fcd5d920bdf < d975bec1eaeb52341acc9273db79ddb078220399

Linux >= 7b812a369e6416ab06d83cdd39d8e3f752781dd0 < cc21dc48a78cc9e5af9a4d039cd456446a6e73ff

Linux >= 168ff181f5b6e7fce684c98a30d35da1dbf8f82a < 95adbd2ac8de82e43fd6b347e7e1b47f74dc1abb

Linux >= 84472b436e760ba439e1969a9e3c5ae7c86de39d < 14e8bc3bf7bd6af64d7538a0684c8238d96cdfd7

Linux >= 84472b436e760ba439e1969a9e3c5ae7c86de39d < 8ec95b94716a1e4d126edc3fb2bc426a717e2dba

Linux 87d532d41ef937e16f61b3d2094f3a2ac49be365

Linux abb4caa477a5450817d2aa1198edce66450aecf8

Linux >= 5.4.189 < 5.4.225

Linux >= 5.10.110 < 5.10.155

Linux >= 5.15.33 < 5.15.79

Linux >= 5.16.19 < 5.17

Linux >= 5.17.2 < 5.18

Linux 5.18