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

ubi: Fix use-after-free when volume resizing failed

There is an use-after-free problem reported by KASAN:
==================================================================
BUG: KASAN: use-after-free in ubi_eba_copy_table+0x11f/0x1c0 [ubi]
Read of size 8 at addr ffff888101eec008 by task ubirsvol/4735

CPU: 2 PID: 4735 Comm: ubirsvol
Not tainted 6.1.0-rc1-00003-g84fa3304a7fc-dirty #14
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996),
BIOS 1.14.0-1.fc33 04/01/2014
Call Trace:
<TASK>
dump_stack_lvl+0x34/0x44
print_report+0x171/0x472
kasan_report+0xad/0x130
ubi_eba_copy_table+0x11f/0x1c0 [ubi]
ubi_resize_volume+0x4f9/0xbc0 [ubi]
ubi_cdev_ioctl+0x701/0x1850 [ubi]
__x64_sys_ioctl+0x11d/0x170
do_syscall_64+0x35/0x80
entry_SYSCALL_64_after_hwframe+0x46/0xb0
</TASK>

When ubi_change_vtbl_record() returns an error in ubi_resize_volume(),
"new_eba_tbl" will be freed on error handing path, but it is holded
by "vol->eba_tbl" in ubi_eba_replace_table(). It means that the liftcycle
of "vol->eba_tbl" and "vol" are different, so when resizing volume in
next time, it causing an use-after-free fault.

Fix it by not freeing "new_eba_tbl" after it replaced in
ubi_eba_replace_table(), while will be freed in next volume resizing.

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 0.00036.

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
801c135ce73d5df1caf3eca35b66a10824ae0707 affected < bf9875aa7f7d624a8c084425b14bf7e5907ebc30
801c135ce73d5df1caf3eca35b66a10824ae0707 affected < bf795ebbb9995e2fe7945de71177f01c2f1215dc
801c135ce73d5df1caf3eca35b66a10824ae0707 affected < 9c8be1f165baee53b5a36ea0b3c9281d403a1d0b
801c135ce73d5df1caf3eca35b66a10824ae0707 affected < 35f8d4064e54c18424db2997059d4c0b1d13d093
801c135ce73d5df1caf3eca35b66a10824ae0707 affected < 53818746e549e61841428892a8d94344494be797
801c135ce73d5df1caf3eca35b66a10824ae0707 affected < b0c951742348d216f094d16ed4f70ae73db881c0
801c135ce73d5df1caf3eca35b66a10824ae0707 affected < 3d6378f7056ac7350338f941001162a8f660853c
801c135ce73d5df1caf3eca35b66a10824ae0707 affected < 9af31d6ec1a4be4caab2550096c6bd2ba8fba472
Linux Linux affected
Version Status Constraints
2.6.22 affected —
0 unaffected < 2.6.22
4.14.308 unaffected ≤ 4.14.*
4.19.276 unaffected ≤ 4.19.*
5.4.235 unaffected ≤ 5.4.*
5.10.173 unaffected ≤ 5.10.*
5.15.100 unaffected ≤ 5.15.*
6.1.18 unaffected ≤ 6.1.*
6.2.5 unaffected ≤ 6.2.*
6.3 unaffected ≤ *

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References
Link Providers
https://git.kernel.org/stable/c/35f8d4064e54c18424db2997059d4c0b1d13d093 cve-icon cve-icon
https://git.kernel.org/stable/c/3d6378f7056ac7350338f941001162a8f660853c cve-icon cve-icon
https://git.kernel.org/stable/c/53818746e549e61841428892a8d94344494be797 cve-icon cve-icon
https://git.kernel.org/stable/c/9af31d6ec1a4be4caab2550096c6bd2ba8fba472 cve-icon cve-icon
https://git.kernel.org/stable/c/9c8be1f165baee53b5a36ea0b3c9281d403a1d0b cve-icon cve-icon
https://git.kernel.org/stable/c/b0c951742348d216f094d16ed4f70ae73db881c0 cve-icon cve-icon
https://git.kernel.org/stable/c/bf795ebbb9995e2fe7945de71177f01c2f1215dc cve-icon cve-icon
https://git.kernel.org/stable/c/bf9875aa7f7d624a8c084425b14bf7e5907ebc30 cve-icon cve-icon
https://lore.kernel.org/linux-cve-announce/2025120942-CVE-2023-53800-eb42@gregkh/T cve-icon
https://nvd.nist.gov/vuln/detail/CVE-2023-53800 cve-icon
https://www.cve.org/CVERecord?id=CVE-2023-53800 cve-icon
History

Wed, 10 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

Tue, 09 Dec 2025 00:30:00 +0000

Type Values Removed Values Added
Description In the Linux kernel, the following vulnerability has been resolved: ubi: Fix use-after-free when volume resizing failed There is an use-after-free problem reported by KASAN: ================================================================== BUG: KASAN: use-after-free in ubi_eba_copy_table+0x11f/0x1c0 [ubi] Read of size 8 at addr ffff888101eec008 by task ubirsvol/4735 CPU: 2 PID: 4735 Comm: ubirsvol Not tainted 6.1.0-rc1-00003-g84fa3304a7fc-dirty #14 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.14.0-1.fc33 04/01/2014 Call Trace: <TASK> dump_stack_lvl+0x34/0x44 print_report+0x171/0x472 kasan_report+0xad/0x130 ubi_eba_copy_table+0x11f/0x1c0 [ubi] ubi_resize_volume+0x4f9/0xbc0 [ubi] ubi_cdev_ioctl+0x701/0x1850 [ubi] __x64_sys_ioctl+0x11d/0x170 do_syscall_64+0x35/0x80 entry_SYSCALL_64_after_hwframe+0x46/0xb0 </TASK> When ubi_change_vtbl_record() returns an error in ubi_resize_volume(), "new_eba_tbl" will be freed on error handing path, but it is holded by "vol->eba_tbl" in ubi_eba_replace_table(). It means that the liftcycle of "vol->eba_tbl" and "vol" are different, so when resizing volume in next time, it causing an use-after-free fault. Fix it by not freeing "new_eba_tbl" after it replaced in ubi_eba_replace_table(), while will be freed in next volume resizing.
Title ubi: Fix use-after-free when volume resizing failed
First Time appeared Linux
Linux linux Kernel
CPEs cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Vendors & Products Linux
Linux linux Kernel
References

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cve-icon MITRE

Status: PUBLISHED

Assigner: Linux

Published:

Updated: 2025-12-09T00:00:56.507Z

Reserved: 2025-12-08T23:58:35.275Z

Link: CVE-2023-53800

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Awaiting Analysis

Published: 2025-12-09T01:16:51.727

Modified: 2025-12-09T18:37:13.640

Link: CVE-2023-53800

cve-icon Redhat

Severity : Moderate

Publid Date: 2025-12-09T00:00:00Z

Links: CVE-2023-53800 - Bugzilla

cve-icon OpenCVE Enrichment

No data.

Weaknesses

No weakness.