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

net: ipv4: fix one memleak in __inet_del_ifa()

I got the below warning when do fuzzing test:
unregister_netdevice: waiting for bond0 to become free. Usage count = 2

It can be repoduced via:

ip link add bond0 type bond
sysctl -w net.ipv4.conf.bond0.promote_secondaries=1
ip addr add 4.117.174.103/0 scope 0x40 dev bond0
ip addr add 192.168.100.111/255.255.255.254 scope 0 dev bond0
ip addr add 0.0.0.4/0 scope 0x40 secondary dev bond0
ip addr del 4.117.174.103/0 scope 0x40 dev bond0
ip link delete bond0 type bond

In this reproduction test case, an incorrect 'last_prim' is found in
__inet_del_ifa(), as a result, the secondary address(0.0.0.4/0 scope 0x40)
is lost. The memory of the secondary address is leaked and the reference of
in_device and net_device is leaked.

Fix this problem:
Look for 'last_prim' starting at location of the deleted IP and inserting
the promoted IP into the location of 'last_prim'.

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 0.00035.

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
0ff60a45678e67b2547256a636fd00c1667ce4fa affected < 5624f26a3574500ce23929cb2c9976a0dec9920a
0ff60a45678e67b2547256a636fd00c1667ce4fa affected < 7c8ddcdab1b900bed69cad6beef477fff116289e
0ff60a45678e67b2547256a636fd00c1667ce4fa affected < 2f1e86014d0cc084886c36a2d77bc620e2d42618
0ff60a45678e67b2547256a636fd00c1667ce4fa affected < 980f8445479814509a3cd55a8eabaae1c9030a4c
0ff60a45678e67b2547256a636fd00c1667ce4fa affected < 42652af5360d30b43b06057c193739e7dfb18f42
0ff60a45678e67b2547256a636fd00c1667ce4fa affected < ac28b1ec6135649b5d78b028e47264cb3ebca5ea
Linux Linux affected
Version Status Constraints
2.6.15 affected —
0 unaffected < 2.6.15
5.4.257 unaffected ≤ 5.4.*
5.10.195 unaffected ≤ 5.10.*
5.15.132 unaffected ≤ 5.15.*
6.1.54 unaffected ≤ 6.1.*
6.5.4 unaffected ≤ 6.5.*
6.6 unaffected ≤ *

No data.

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No data.

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Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://git.kernel.org/stable/c/2f1e86014d0cc084886c36a2d77bc620e2d42618 cve-icon cve-icon
https://git.kernel.org/stable/c/42652af5360d30b43b06057c193739e7dfb18f42 cve-icon cve-icon
https://git.kernel.org/stable/c/5624f26a3574500ce23929cb2c9976a0dec9920a cve-icon cve-icon
https://git.kernel.org/stable/c/7c8ddcdab1b900bed69cad6beef477fff116289e cve-icon cve-icon
https://git.kernel.org/stable/c/980f8445479814509a3cd55a8eabaae1c9030a4c cve-icon cve-icon
https://git.kernel.org/stable/c/ac28b1ec6135649b5d78b028e47264cb3ebca5ea cve-icon cve-icon
https://lore.kernel.org/linux-cve-announce/2025122425-CVE-2023-53995-1860@gregkh/T cve-icon
https://nvd.nist.gov/vuln/detail/CVE-2023-53995 cve-icon
https://www.cve.org/CVERecord?id=CVE-2023-53995 cve-icon
History

Fri, 26 Dec 2025 00:15:00 +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 11:15:00 +0000

Type Values Removed Values Added
Description In the Linux kernel, the following vulnerability has been resolved: net: ipv4: fix one memleak in __inet_del_ifa() I got the below warning when do fuzzing test: unregister_netdevice: waiting for bond0 to become free. Usage count = 2 It can be repoduced via: ip link add bond0 type bond sysctl -w net.ipv4.conf.bond0.promote_secondaries=1 ip addr add 4.117.174.103/0 scope 0x40 dev bond0 ip addr add 192.168.100.111/255.255.255.254 scope 0 dev bond0 ip addr add 0.0.0.4/0 scope 0x40 secondary dev bond0 ip addr del 4.117.174.103/0 scope 0x40 dev bond0 ip link delete bond0 type bond In this reproduction test case, an incorrect 'last_prim' is found in __inet_del_ifa(), as a result, the secondary address(0.0.0.4/0 scope 0x40) is lost. The memory of the secondary address is leaked and the reference of in_device and net_device is leaked. Fix this problem: Look for 'last_prim' starting at location of the deleted IP and inserting the promoted IP into the location of 'last_prim'.
Title net: ipv4: fix one memleak in __inet_del_ifa()
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: 2025-12-24T10:55:32.713Z

Reserved: 2025-12-24T10:53:46.176Z

Link: CVE-2023-53995

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Awaiting Analysis

Published: 2025-12-24T11:15:52.403

Modified: 2025-12-29T15:58:56.260

Link: CVE-2023-53995

cve-icon Redhat

Severity : Moderate

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

Links: CVE-2023-53995 - Bugzilla

cve-icon OpenCVE Enrichment

No data.

Weaknesses

No weakness.