CVE-2023-53800 Details
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.
A use-after-free vulnerability has been identified in the Linux kernel's Unsorted Block Images (UBI) subsystem, specifically within the volume management code. This issue arises when the 'ubi_change_vtbl_record()' function returns an error during volume resizing. The 'new_eba_tbl' variable, which holds a reference to the volume's erase block allocation table, is freed as part of the error handling process. However, this table is still referenced by 'vol->eba_tbl' in the 'ubi_eba_replace_table()' function. As a result, the lifecycles of 'vol->eba_tbl' and the volume itself become mismatched. When the volume is resized again, it leads to a use-after-free condition, where the freed memory is accessed, potentially causing memory corruption or other unintended behavior.
Users can upgrade to the patched version of the Linux kernel, which is available in the official Linux kernel repositories. Instructions for downloading the latest stable kernel can be found on the official Linux kernel website.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Dec 9, 2025References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://git.kernel.org/stable/c/35f8d4064e54c18424db2997059d4c0b1d13d093 | kernel.org | Source CodeVendor |
| https://git.kernel.org/stable/c/3d6378f7056ac7350338f941001162a8f660853c | kernel.org | Source CodeVendor |
| https://git.kernel.org/stable/c/53818746e549e61841428892a8d94344494be797 | kernel.org | Source CodeVendor |
| https://git.kernel.org/stable/c/9af31d6ec1a4be4caab2550096c6bd2ba8fba472 | kernel.org | Source CodeVendor |
| https://git.kernel.org/stable/c/9c8be1f165baee53b5a36ea0b3c9281d403a1d0b | kernel.org | Source CodeVendor |
| https://git.kernel.org/stable/c/b0c951742348d216f094d16ed4f70ae73db881c0 | kernel.org | Source CodeVendor |
| https://git.kernel.org/stable/c/bf795ebbb9995e2fe7945de71177f01c2f1215dc | kernel.org | Source CodeVendor |
| https://git.kernel.org/stable/c/bf9875aa7f7d624a8c084425b14bf7e5907ebc30 | kernel.org | Source CodeVendor |
Weakness Enumeration
No weakness enumeration is available for this CVE.
Affected Products
| Product | Versions |
|---|---|
| Linux kernel | >= 6.1.0-rc1-00003-g84fa3304a7fc-dirty, < 6.1.0-rc1-00003-g84fa3304a7fc-dirty (semver) |
CPE
Remediation
| |
| Linux UBI | All versions |
CPE
Remediation
| |
Change History
3 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Aug 4, 2026 | CVE Modified | kernel.org |
| Jun 17, 2026 | CVE Modified | kernel.org |
| Dec 9, 2025 | New CVE Received | kernel.org |