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

macvlan: fix possible UAF in macvlan_forward_source()

Add RCU protection on (struct macvlan_source_entry)->vlan.

Whenever macvlan_hash_del_source() is called, we must clear
entry->vlan pointer before RCU grace period starts.

This allows macvlan_forward_source() to skip over
entries queued for freeing.

Note that macvlan_dev are already RCU protected, as they
are embedded in a standard netdev (netdev_priv(ndev)).

https: //lore.kernel.org/netdev/695fb1e8.050a0220.1c677c.039f.GAE@google.com/T/#u

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 0.00018.

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
79cf79abce71eb7dbc40e2f3121048ca5405cb47 affected < 8133e85b8a3ec9f10d861e0002ec6037256e987e
79cf79abce71eb7dbc40e2f3121048ca5405cb47 affected < 484919832e2db6ce1e8add92c469e5d459a516b5
79cf79abce71eb7dbc40e2f3121048ca5405cb47 affected < 232afc74a6dde0fe1830988e5827921f5ec9bb3f
79cf79abce71eb7dbc40e2f3121048ca5405cb47 affected < 15f6faf36e162532bec5cc05eb3fc622108bf2ed
79cf79abce71eb7dbc40e2f3121048ca5405cb47 affected < 8518712a2ca952d6da2238c6f0a16b4ae5ea3f13
79cf79abce71eb7dbc40e2f3121048ca5405cb47 affected < 6dbead9c7677186f22b7981dd085a0feec1f038e
79cf79abce71eb7dbc40e2f3121048ca5405cb47 affected < 7470a7a63dc162f07c26dbf960e41ee1e248d80e
Linux Linux affected
Version Status Constraints
3.18 affected —
0 unaffected < 3.18
5.10.249 unaffected ≤ 5.10.*
5.15.199 unaffected ≤ 5.15.*
6.1.162 unaffected ≤ 6.1.*
6.6.122 unaffected ≤ 6.6.*
6.12.67 unaffected ≤ 6.12.*
6.18.7 unaffected ≤ 6.18.*
6.19 unaffected ≤ *

No data.

No data.

No data.

Project Subscriptions

Vendors Products
Linux Subscribe
Linux Kernel Subscribe
Advisories
Source ID Title
Debian DLA Debian DLA DLA-4475-1 linux security update
Debian DLA Debian DLA DLA-4476-1 linux-6.1 security update
Debian DSA Debian DSA DSA-6126-1 linux security update
Debian DSA Debian DSA DSA-6127-1 linux security update
Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://git.kernel.org/stable/c/15f6faf36e162532bec5cc05eb3fc622108bf2ed cve-icon cve-icon
https://git.kernel.org/stable/c/232afc74a6dde0fe1830988e5827921f5ec9bb3f cve-icon cve-icon
https://git.kernel.org/stable/c/484919832e2db6ce1e8add92c469e5d459a516b5 cve-icon cve-icon
https://git.kernel.org/stable/c/6dbead9c7677186f22b7981dd085a0feec1f038e cve-icon cve-icon
https://git.kernel.org/stable/c/7470a7a63dc162f07c26dbf960e41ee1e248d80e cve-icon cve-icon
https://git.kernel.org/stable/c/8133e85b8a3ec9f10d861e0002ec6037256e987e cve-icon cve-icon
https://git.kernel.org/stable/c/8518712a2ca952d6da2238c6f0a16b4ae5ea3f13 cve-icon cve-icon
https://lore.kernel.org/linux-cve-announce/2026012534-CVE-2026-23001-7ab0@gregkh/T cve-icon
https://nvd.nist.gov/vuln/detail/CVE-2026-23001 cve-icon
https://www.cve.org/CVERecord?id=CVE-2026-23001 cve-icon
History

Fri, 06 Feb 2026 16:45:00 +0000

Type Values Removed Values Added
References

Fri, 30 Jan 2026 10:00:00 +0000

Type Values Removed Values Added
References

Mon, 26 Jan 2026 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

Important

Sun, 25 Jan 2026 14:45:00 +0000

Type Values Removed Values Added
Description In the Linux kernel, the following vulnerability has been resolved: macvlan: fix possible UAF in macvlan_forward_source() Add RCU protection on (struct macvlan_source_entry)->vlan. Whenever macvlan_hash_del_source() is called, we must clear entry->vlan pointer before RCU grace period starts. This allows macvlan_forward_source() to skip over entries queued for freeing. Note that macvlan_dev are already RCU protected, as they are embedded in a standard netdev (netdev_priv(ndev)). https: //lore.kernel.org/netdev/695fb1e8.050a0220.1c677c.039f.GAE@google.com/T/#u
Title macvlan: fix possible UAF in macvlan_forward_source()
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: 2026-02-09T08:36:53.776Z

Reserved: 2026-01-13T15:37:45.938Z

Link: CVE-2026-23001

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-01-25T15:15:54.970

Modified: 2026-02-06T17:16:20.783

Link: CVE-2026-23001

cve-icon Redhat

Severity : Important

Publid Date: 2026-01-25T00:00:00Z

Links: CVE-2026-23001 - Bugzilla

cve-icon OpenCVE Enrichment

No data.

Weaknesses

No weakness.