CVE-2023-53271

ubi: Fix unreferenced object reported by kmemleak in ubi_resize_volume()

State: Published
Severity: 5.5 Medium
Published: Sep 16, 2025
Updated: May 11, 2026
Reserved: Sep 16, 2025

Description

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

ubi: Fix unreferenced object reported by kmemleak in ubi_resize_volume()

There is a memory leaks problem reported by kmemleak:

unreferenced object 0xffff888102007a00 (size 128): comm "ubirsvol", pid 32090, jiffies 4298464136 (age 2361.231s) hex dump (first 32 bytes): ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................ ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ................ backtrace: [<ffffffff8176cecd>] __kmalloc+0x4d/0x150 [<ffffffffa02a9a36>] ubi_eba_create_table+0x76/0x170 [ubi] [<ffffffffa029764e>] ubi_resize_volume+0x1be/0xbc0 [ubi] [<ffffffffa02a3321>] ubi_cdev_ioctl+0x701/0x1850 [ubi] [<ffffffff81975d2d>] __x64_sys_ioctl+0x11d/0x170 [<ffffffff83c142a5>] do_syscall_64+0x35/0x80 [<ffffffff83e0006a>] entry_SYSCALL_64_after_hwframe+0x46/0xb0

This is due to a mismatch between create and destroy interfaces, and in detail that "new_eba_tbl" created by ubi_eba_create_table() but destroyed by kfree(), while will causing "new_eba_tbl->entries" not freed.

Fix it by replacing kfree(new_eba_tbl) with ubi_eba_destroy_table(new_eba_tbl)

Scores

CVSS	Score	Vector	Source
3.1	5.5 Medium	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H	CISA-ADP

Weaknesses

CWE-401 Missing Release of Memory after Effective Lifetime

Affected Products

Product	Versions
LinuxLinux	799dca34ac543485f581bd8464ec9b1c4f0f852a to before 09780a44093b53f9cbca76246af2e4ff0884e512Affected 799dca34ac543485f581bd8464ec9b1c4f0f852a to before 26ec2d66aecab8ff997b912c20247fedba4f5740Affected 799dca34ac543485f581bd8464ec9b1c4f0f852a to before 07b60f7452d2fa731737552937cb81821919f874Affected 799dca34ac543485f581bd8464ec9b1c4f0f852a to before 31d60afe2cc2b712dbefcaab6b7d6a47036f844eAffected 799dca34ac543485f581bd8464ec9b1c4f0f852a to before 95a72417dd13ebcdcb1bd0c5d4d15f7c5bfbb288Affected 799dca34ac543485f581bd8464ec9b1c4f0f852a to before 27b760b81951d8d5e5c952a696af8574052b0709Affected 799dca34ac543485f581bd8464ec9b1c4f0f852a to before 5c0c81a313492b83bd0c038b8839b0e04eb87563Affected 799dca34ac543485f581bd8464ec9b1c4f0f852a to before 1e591ea072df7211f64542a09482b5f81cb3ad27Affected
LinuxLinux	4.9Affected before 4.9Not affected 4.14.308 through 4.14.Not affected 4.19.276 through 4.19.Not affected 5.4.235 through 5.4.Not affected 5.10.173 through 5.10.Not affected 5.15.100 through 5.15.Not affected 6.1.18 through 6.1.Not affected 6.2.5 through 6.2.*Not affected 6.3 and laterNot affected

Product

Versions

LinuxLinux

799dca34ac543485f581bd8464ec9b1c4f0f852a to before 09780a44093b53f9cbca76246af2e4ff0884e512Affected
799dca34ac543485f581bd8464ec9b1c4f0f852a to before 26ec2d66aecab8ff997b912c20247fedba4f5740Affected
799dca34ac543485f581bd8464ec9b1c4f0f852a to before 07b60f7452d2fa731737552937cb81821919f874Affected
799dca34ac543485f581bd8464ec9b1c4f0f852a to before 31d60afe2cc2b712dbefcaab6b7d6a47036f844eAffected
799dca34ac543485f581bd8464ec9b1c4f0f852a to before 95a72417dd13ebcdcb1bd0c5d4d15f7c5bfbb288Affected
799dca34ac543485f581bd8464ec9b1c4f0f852a to before 27b760b81951d8d5e5c952a696af8574052b0709Affected
799dca34ac543485f581bd8464ec9b1c4f0f852a to before 5c0c81a313492b83bd0c038b8839b0e04eb87563Affected
799dca34ac543485f581bd8464ec9b1c4f0f852a to before 1e591ea072df7211f64542a09482b5f81cb3ad27Affected

LinuxLinux

4.9Affected
before 4.9Not affected
4.14.308 through 4.14.*Not affected
4.19.276 through 4.19.*Not affected
5.4.235 through 5.4.*Not affected
5.10.173 through 5.10.*Not affected
5.15.100 through 5.15.*Not affected
6.1.18 through 6.1.*Not affected
6.2.5 through 6.2.*Not affected
6.3 and laterNot affected

References

Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.