What is CVE-2022-50655?

CVE-2022-50655 is a unscored severity Linux kernel vulnerability, affecting Linux kernel versions from 4.20 onward and patched in 5.4.229, 5.10.163, 5.15.86 and others. CVE-2022-50655 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2022-50655?

CVE-2022-50655 has a CVSS score of pending NVD analysis out of 10, rated awaiting scoring severity.

Is there a patch available for CVE-2022-50655?

Yes, CVE-2022-50655 has been patched. Fixed versions include 5.4.229, 5.10.163, 5.15.86 and others. If you are running Linux kernel 4.20 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2022-50655 actively exploited?

CVE-2022-50655 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2022-50655

In the Linux kernel, the following vulnerability has been resolved: ppp: associate skb with a device at tx Syzkaller triggered flow dissector warning with the following: r0 = openat$ppp(0xffffffffffffff9c, &(0x7f0000000000), 0xc0802, 0x0) ioctl$PPPIOCNEWUNIT(r0, 0xc004743e, &(0x7f00000000c0)) ioctl$PPPIOCSACTIVE(r0, 0x40107446, &(0x7f0000000240)={0x2, &(0x7f0000000180)=[{0x20, 0x0, 0x0, 0xfffff034}, {0x6}]}) pwritev(r0, &(0x7f0000000040)=[{&(0x7f0000000140)='\x00!', 0x2}], 0x1, 0x0, 0x0) [ 9.485814] WARNING: CPU: 3 PID: 329 at net/core/flow_dissector.c:1016 __skb_flow_dissect+0x1ee0/0x1fa0 [ 9.485929] skb_get_poff+0x53/0xa0 [ 9.485937] bpf_skb_get_pay_offset+0xe/0x20 [ 9.485944] ? ppp_send_frame+0xc2/0x5b0 [ 9.485949] ? _raw_spin_unlock_irqrestore+0x40/0x60 [ 9.485958] ? __ppp_xmit_process+0x7a/0xe0 [ 9.485968] ? ppp_xmit_process+0x5b/0xb0 [ 9.485974] ? ppp_write+0x12a/0x190 [ 9.485981] ? do_iter_write+0x18e/0x2d0 [ 9.485987] ? __import_iovec+0x30/0x130 [ 9.485997] ? do_pwritev+0x1b6/0x240 [ 9.486016] ? trace_hardirqs_on+0x47/0x50 [ 9.486023] ? __x64_sys_pwritev+0x24/0x30 [ 9.486026] ? do_syscall_64+0x3d/0x80 [ 9.486031] ? entry_SYSCALL_64_after_hwframe+0x63/0xcd Flow dissector tries to find skb net namespace either via device or via socket. Neigher is set in ppp_send_frame, so let's manually use ppp->dev.

Package Linux Kernel

Published 2025-12-09

Last modified 2026-04-15

Patch available

Yes

Affected versions

Linux kernel versions 4.20 and later are affected. Fixed in 5.4.229, 5.10.163, 5.15.86, 6.0.16, 6.1.2, 6.2 and their respective stable series.

Affected from

≥ 4.20

Fixed in

✓ 5.4.229 5.4.x ✓ 5.10.163 5.10.x ✓ 5.15.86 5.15.x ✓ 6.0.16 6.0.x ✓ 6.1.2 6.1.x ✓ 6.2

References

The following references provide additional information about CVE-2022-50655 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

Kernel patch commit
https://git.kernel.org/stable/c/148dcbd3af039ae39c3af697a3183008c7995805
Patch
Kernel patch commit
https://git.kernel.org/stable/c/18dc946360bfe0de016a59e3cc3ee1f450fceb9d
Patch
Kernel patch commit
https://git.kernel.org/stable/c/4b8f3b939266c90f03b7cc7e26a4c28c7b64137b
Patch

6 patch commits total View all on NVD

Frequently asked questions

What is CVE-2022-50655?

CVE-2022-50655 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 4.20 onward and has been patched in 5.4.229, 5.10.163, 5.15.86 and others. CVE-2022-50655 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
Is there a patch available for CVE-2022-50655?

Yes — CVE-2022-50655 has been patched. Fixed versions include 5.4.229, 5.10.163, 5.15.86 and others. If you are running Linux kernel 4.20 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2022-50655 actively exploited?

No — CVE-2022-50655 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.