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

ipv6/sit: use DEV_STATS_INC() to avoid data-races

syzbot/KCSAN reported that multiple cpus are updating dev->stats.tx_error
concurrently.

This is because sit tunnels are NETIF_F_LLTX, meaning their ndo_start_xmit()
is not protected by a spinlock.

While original KCSAN report was about tx path, rx path has the same issue.

No CVSS v4.0

Attack Vector Local

Attack Complexity High

Privileges Required Low

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00025.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
Linux Linux unaffected
Version Status Constraints
8df40d1033d64597dcf1efd4f7547e817f7a953b affected < 222cc04356984f3f98acfa756a69d4bed7c501ac
8df40d1033d64597dcf1efd4f7547e817f7a953b affected < 4eed93bb3e57b8cc78d17166a14e40a73276015a
8df40d1033d64597dcf1efd4f7547e817f7a953b affected < 207501a986831174df09a36a8cb62a28f92f0dc8
8df40d1033d64597dcf1efd4f7547e817f7a953b affected < cb34b7cf17ecf33499c9298943f85af247abc1e9
Linux Linux affected
Version Status Constraints
2.6.37 affected —
0 unaffected < 2.6.37
5.15.86 unaffected ≤ 5.15.*
6.0.16 unaffected ≤ 6.0.*
6.1.2 unaffected ≤ 6.1.*
6.2 unaffected ≤ *

No data.

No data.

No data.

Project Subscriptions

Vendors Products
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Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://git.kernel.org/stable/c/207501a986831174df09a36a8cb62a28f92f0dc8 cve-icon cve-icon
https://git.kernel.org/stable/c/222cc04356984f3f98acfa756a69d4bed7c501ac cve-icon cve-icon
https://git.kernel.org/stable/c/4eed93bb3e57b8cc78d17166a14e40a73276015a cve-icon cve-icon
https://git.kernel.org/stable/c/cb34b7cf17ecf33499c9298943f85af247abc1e9 cve-icon cve-icon
https://lore.kernel.org/linux-cve-announce/2025122456-CVE-2022-50764-45eb@gregkh/T cve-icon
https://nvd.nist.gov/vuln/detail/CVE-2022-50764 cve-icon
https://www.cve.org/CVERecord?id=CVE-2022-50764 cve-icon
History

Thu, 25 Dec 2025 12:15:00 +0000

Type Values Removed Values Added
References
Metrics threat_severity

None

 cvssV3_1

{'score': 7.0, 'vector': 'CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H'}

threat_severity

Moderate

Wed, 24 Dec 2025 13:15:00 +0000

Type Values Removed Values Added
Description In the Linux kernel, the following vulnerability has been resolved: ipv6/sit: use DEV_STATS_INC() to avoid data-races syzbot/KCSAN reported that multiple cpus are updating dev->stats.tx_error concurrently. This is because sit tunnels are NETIF_F_LLTX, meaning their ndo_start_xmit() is not protected by a spinlock. While original KCSAN report was about tx path, rx path has the same issue.
Title ipv6/sit: use DEV_STATS_INC() to avoid data-races
First Time appeared Linux
Linux linux Kernel
CPEs cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Vendors & Products Linux
Linux linux Kernel
References

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: Linux

Published:

Updated: 2026-01-02T15:04:28.987Z

Reserved: 2025-12-24T13:02:21.546Z

Link: CVE-2022-50764

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Awaiting Analysis

Published: 2025-12-24T13:16:03.193

Modified: 2025-12-29T15:58:34.503

Link: CVE-2022-50764

cve-icon Redhat

Severity : Moderate

Publid Date: 2025-12-24T00:00:00Z

Links: CVE-2022-50764 - Bugzilla

cve-icon OpenCVE Enrichment

No data.

Weaknesses

No weakness.