CVE-2023-53995

Not scored yetLast modified Jun 17, 2026

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'.

Metrics

No CVSS score has been published yet.

Affected software

VendorProductVersions
LinuxLinux>= 0ff60a45678e67b2547256a636fd00c1667ce4fa, < 5624f26a3574500ce23929cb2c9976a0dec9920a; >= 0ff60a45678e67b2547256a636fd00c1667ce4fa, < 7c8ddcdab1b900bed69cad6beef477fff116289e; >= 0ff60a45678e67b2547256a636fd00c1667ce4fa, < 2f1e86014d0cc084886c36a2d77bc620e2d42618; >= 0ff60a45678e67b2547256a636fd00c1667ce4fa, < 980f8445479814509a3cd55a8eabaae1c9030a4c; >= 0ff60a45678e67b2547256a636fd00c1667ce4fa, < 42652af5360d30b43b06057c193739e7dfb18f42; >= 0ff60a45678e67b2547256a636fd00c1667ce4fa, < ac28b1ec6135649b5d78b028e47264cb3ebca5ea
LinuxLinux2.6.15

References

Timeline

Published
Dec 24, 2025
Last modified
Jun 17, 2026
NVD status
Deferred

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CVE-2023-53995: Unscored | Vulnix