{"id":"CVE-2023-53800","url":"https://www.cyber-defence.io/tools/cve/CVE-2023-53800","generatedAt":"2026-10-28T07:25:30.739Z","title":"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:…","description":"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  ==================================================================\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.","published":"2025-12-09T01:16:52.000Z","lastModified":"2026-10-15T22:17:49.000Z","status":"Deferred","sourceIdentifier":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","cvss":{"version":"3.1","score":7.8,"severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"},"cwe":[],"affected":[],"epss":{"score":0.00139,"percentile":0.0324,"date":"2026-10-27","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (0.14%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[],"references":[{"url":"https://git.kernel.org/stable/c/35f8d4064e54c18424db2997059d4c0b1d13d093","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/3d6378f7056ac7350338f941001162a8f660853c","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/53818746e549e61841428892a8d94344494be797","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/9af31d6ec1a4be4caab2550096c6bd2ba8fba472","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/9c8be1f165baee53b5a36ea0b3c9281d403a1d0b","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/b0c951742348d216f094d16ed4f70ae73db881c0","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/bf795ebbb9995e2fe7945de71177f01c2f1215dc","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/bf9875aa7f7d624a8c084425b14bf7e5907ebc30","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2023-53800","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}