CVE-2022-49877

Medium

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;

Package Linux Kernel
Published 2025-05-01
Last modified 2025-11-10
CVSS version 3.1
Patch available
Yes

CVSS 3.1 score

5.5

out of 10
Medium
Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
High
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected versions

Linux kernel versions 5.4.189, 5.10.110, 5.15.33, 5.16.19, 5.17.2, 5.18 and later are affected. Fixed in 5.4.225, 5.10.155, 5.15.79, 6.0.9, 6.1 and their respective stable series.

Affected from
≥ 5.4.189 ≥ 5.10.110 ≥ 5.15.33 ≥ 5.16.19 ≥ 5.17.2 ≥ 5.18
Fixed in
✓ 5.4.225 5.4.x ✓ 5.10.155 5.10.x ✓ 5.15.79 5.15.x ✓ 6.0.9 6.0.x ✓ 6.1

References

The following references provide additional information about CVE-2022-49877 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

5 patch commits total View all on NVD

Frequently asked questions

  • What is CVE-2022-49877?

    CVE-2022-49877 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10 . It affects Linux kernel versions from 5.4.189 onward and has been patched in 5.4.225, 5.10.155, 5.15.79 and others. CVE-2022-49877 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

  • What is the CVSS score for CVE-2022-49877?

    CVE-2022-49877 has a CVSS score of 5.5 out of 10, rated Medium severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H .

  • Is there a patch available for CVE-2022-49877?

    Yes — CVE-2022-49877 has been patched. Fixed versions include 5.4.225, 5.10.155, 5.15.79 and others. If you are running Linux kernel 5.4.189 or later up to the fix versions, apply the relevant patch for your kernel branch.

  • Is CVE-2022-49877 actively exploited?

    No — CVE-2022-49877 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

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