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Linux KernelOperating system · Linux

CVE-2022-49877

MEDIUM · 5.5 CVSS v3.1 Published 2025-05-01
Fix available
A fix is available. Upgrade to 5.4.225 / 5.10.155 or later.
See remediation →
57/100
Remediation priority · Elevated
Zero-click Patch available

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
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;

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis

A detailed technical summary for this CVE is being prepared.

Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.

NVD · CPE data
Linux KernelOperating system
Affected:>= 5.4.189, < 5.4.225>= 5.10.110, < 5.10.155>= 5.15.33, < 5.15.79>= 5.16.19, < 5.17>= 5.17.2, < 6.0.9= 6.1

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

dbcve · scoped
Upgrade available Upgrade to 5.4.225 / 5.10.155 / 5.15.79 or later
Fixed in 5.4.2255.10.1555.15.79
Vendor patch git.kernel.org →
Recommended fix High confidence

5.4.225 (or later 5.4.x), 5.10.155 (or later 5.10.x), 5.15.79 (or later 5.15.x), or 6.1+ (recommended for longest support)

  1. Identify your current running kernel version using `uname -r`
  2. Determine which version range your kernel falls into from: 5.4.189-5.4.224, 5.10.110-5.10.154, 5.15.33-5.15.78, or 5.16.19-5.16.x
  3. Upgrade the Linux kernel package via your distribution's package manager (e.g., `apt-get update && apt-get install linux-image-<version>` for Debian/Ubuntu, `yum update kernel` for RHEL/CentOS, or `dnf update kernel` for Fedora)
  4. Reboot the system to load the new kernel: `systemctl reboot`
  5. Verify the fix is applied by checking the kernel version with `uname -r` and confirming it meets the minimum fixed version for your branch
Caveat Standard kernel upgrade risks apply - ensure driver compatibility and test in staging if possible

Generated from the published advisory — verify against the referenced sources before acting.

We can perform the upgrade in your staging environment and verify nothing breaks — typical engagement from $1,600. Get the upgrade done

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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2022-49877 in production — separate from our analysis above.

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What this is

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  • Version or environment caveats, and links to real fixes
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