{"id":"CVE-2023-53800","title":"ubi: Fix use-after-free when volume resizing failed","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nubi: Fix use-after-free when volume resizing failed\n\nThere is an use-after-free problem reported by KASAN:\n  ===========================================================…","severity":"high","cvss":7.8,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","cvssSource":"cna","vendor":"Linux","product":"Linux","affected":["Linux >= 801c135ce73d5df1caf3eca35b66a10824ae0707 < bf9875aa7f7d624a8c084425b14bf7e5907ebc30","Linux >= 801c135ce73d5df1caf3eca35b66a10824ae0707 < bf795ebbb9995e2fe7945de71177f01c2f1215dc","Linux >= 801c135ce73d5df1caf3eca35b66a10824ae0707 < 9c8be1f165baee53b5a36ea0b3c9281d403a1d0b","Linux >= 801c135ce73d5df1caf3eca35b66a10824ae0707 < 35f8d4064e54c18424db2997059d4c0b1d13d093","Linux >= 801c135ce73d5df1caf3eca35b66a10824ae0707 < 53818746e549e61841428892a8d94344494be797","Linux >= 801c135ce73d5df1caf3eca35b66a10824ae0707 < b0c951742348d216f094d16ed4f70ae73db881c0","Linux >= 801c135ce73d5df1caf3eca35b66a10824ae0707 < 3d6378f7056ac7350338f941001162a8f660853c","Linux >= 801c135ce73d5df1caf3eca35b66a10824ae0707 < 9af31d6ec1a4be4caab2550096c6bd2ba8fba472","Linux 2.6.22"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"total","timestamp":"2026-10-15T21:37:18.314683Z"},"published":"2025-12-09","updated":"2026-10-15","sourceUpdated":"2026-10-15T21:41:36.295Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2023-53800","references":[{"url":"https://git.kernel.org/stable/c/bf9875aa7f7d624a8c084425b14bf7e5907ebc30"},{"url":"https://git.kernel.org/stable/c/bf795ebbb9995e2fe7945de71177f01c2f1215dc"},{"url":"https://git.kernel.org/stable/c/9c8be1f165baee53b5a36ea0b3c9281d403a1d0b"},{"url":"https://git.kernel.org/stable/c/35f8d4064e54c18424db2997059d4c0b1d13d093"},{"url":"https://git.kernel.org/stable/c/53818746e549e61841428892a8d94344494be797"},{"url":"https://git.kernel.org/stable/c/b0c951742348d216f094d16ed4f70ae73db881c0"},{"url":"https://git.kernel.org/stable/c/3d6378f7056ac7350338f941001162a8f660853c"},{"url":"https://git.kernel.org/stable/c/9af31d6ec1a4be4caab2550096c6bd2ba8fba472"}],"tags":["cve.org"],"epss":0.00139,"epssPercentile":0.02892,"ingestedAt":"2026-10-15T22:48:25.422Z","slug":"CVE-2023-53800","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nubi: Fix use-after-free when volume resizing failed\n\nThere is an use-after-free problem reported by KASAN:\n  ==================================================================\n  BUG: KASAN: use-after-free in ubi_eba_copy_table+0x11f/0x1c0 [ubi]\n  Read of size 8 at addr ffff888101eec008 by task ubirsvol/4735\n\n  CPU: 2 PID: 4735 Comm: ubirsvol\n  Not tainted 6.1.0-rc1-00003-g84fa3304a7fc-dirty #14\n  Hardware name: QEMU Standard PC (i440FX + PIIX, 1996),\n  BIOS 1.14.0-1.fc33 04/01/2014\n  Call Trace:\n   <TASK>\n   dump_stack_lvl+0x34/0x44\n   print_report+0x171/0x472\n   kasan_report+0xad/0x130\n   ubi_eba_copy_table+0x11f/0x1c0 [ubi]\n   ubi_resize_volume+0x4f9/0xbc0 [ubi]\n   ubi_cdev_ioctl+0x701/0x1850 [ubi]\n   __x64_sys_ioctl+0x11d/0x170\n   do_syscall_64+0x35/0x80\n   entry_SYSCALL_64_after_hwframe+0x46/0xb0\n   </TASK>\n\nWhen ubi_change_vtbl_record() returns an error in ubi_resize_volume(),\n\"new_eba_tbl\" will be freed on error handing path, but it is holded\nby \"vol->eba_tbl\" in ubi_eba_replace_table(). It means that the liftcycle\nof \"vol->eba_tbl\" and \"vol\" are different, so when resizing volume in\nnext time, it causing an use-after-free fault.\n\nFix it by not freeing \"new_eba_tbl\" after it replaced in\nubi_eba_replace_table(), while will be freed in next volume resizing.\n\n## Affected\n\n- `Linux >= 801c135ce73d5df1caf3eca35b66a10824ae0707 < bf9875aa7f7d624a8c084425b14bf7e5907ebc30`\n- `Linux >= 801c135ce73d5df1caf3eca35b66a10824ae0707 < bf795ebbb9995e2fe7945de71177f01c2f1215dc`\n- `Linux >= 801c135ce73d5df1caf3eca35b66a10824ae0707 < 9c8be1f165baee53b5a36ea0b3c9281d403a1d0b`\n- `Linux >= 801c135ce73d5df1caf3eca35b66a10824ae0707 < 35f8d4064e54c18424db2997059d4c0b1d13d093`\n- `Linux >= 801c135ce73d5df1caf3eca35b66a10824ae0707 < 53818746e549e61841428892a8d94344494be797`\n- `Linux >= 801c135ce73d5df1caf3eca35b66a10824ae0707 < b0c951742348d216f094d16ed4f70ae73db881c0`\n- `Linux >= 801c135ce73d5df1caf3eca35b66a10824ae0707 < 3d6378f7056ac7350338f941001162a8f660853c`\n- `Linux >= 801c135ce73d5df1caf3eca35b66a10824ae0707 < 9af31d6ec1a4be4caab2550096c6bd2ba8fba472`\n- `Linux 2.6.22`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":43,"depthScoreParts":{"impact":42.9,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}