CVE-2023-53800

HIGHPre-NVD 7.87.8—
EchelonGraph scoreMEDIUM confidence

Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2025-12-09. the CNA's CVSS baseline 7.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cna:linux, epss, ghsa
Trending — 4 sources updated this week
7.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.8Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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: 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

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.

CVSS v3
7.8
EG Score
7.8(medium)
EG Risk
40(Track)
EG Risk 40/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity78% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
3%
KEV
Not listed

Published

December 9, 2025

Last Modified

August 5, 2026

Advisory Details (8)

Auto-updated Aug 4, 2026
No patch confirmed yet.
generic

ubi: Fix use-after-free when volume resizing failed - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/bf9875aa7f7d624a8c084425b14bf7e5907ebc30
generic

ubi: Fix use-after-free when volume resizing failed - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/bf795ebbb9995e2fe7945de71177f01c2f1215dc
generic

ubi: Fix use-after-free when volume resizing failed - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/b0c951742348d216f094d16ed4f70ae73db881c0
generic

ubi: Fix use-after-free when volume resizing failed - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/9c8be1f165baee53b5a36ea0b3c9281d403a1d0b
generic

ubi: Fix use-after-free when volume resizing failed - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/9af31d6ec1a4be4caab2550096c6bd2ba8fba472
generic

ubi: Fix use-after-free when volume resizing failed - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/53818746e549e61841428892a8d94344494be797
generic

ubi: Fix use-after-free when volume resizing failed - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/3d6378f7056ac7350338f941001162a8f660853c
generic

ubi: Fix use-after-free when volume resizing failed - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/35f8d4064e54c18424db2997059d4c0b1d13d093

Vendor Advisories for CVE-2023-53800(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(1)

Vendor / EcosystemFixed in / PatchReleasedSource
linuxKernel @ 4.14.308—osv

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Data Freshness Timeline

(refreshed 15× in last 7d / 47× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 133 total refreshes for this CVE.

  1. 2026-08-05 19:15 UTCEPSS rescore
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  3. 2026-08-05 10:15 UTCEG score recompute
  4. 2026-08-05 10:15 UTCGHSA enrichment
  5. 2026-08-04 10:53 UTCEG score recompute
  6. 2026-08-04 10:52 UTCGHSA enrichment
  7. 2026-08-04 10:36 UTCEPSS rescore
  8. 2026-08-04 09:27 UTCEG score recompute▲ 7.80
  9. 2026-08-04 09:27 UTCGHSA enrichment
  10. 2026-08-04 09:20 UTCMITRE cvelistV5CVSS v3 → 7.8 · severity → HIGH
  11. 2026-08-03 10:34 UTCEPSS rescore
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  23. 2026-07-23 02:29 UTCEG score recompute
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  74. 2026-06-02 02:39 UTCOSV refresh
  75. 2026-06-01 13:51 UTCEPSS rescore

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Frequently asked(5)

What is CVE-2023-53800?
CVE-2023-53800 is a high vulnerability published on December 9, 2025. 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 ubiebacopy_table+0x11f/0x1c0…
When was CVE-2023-53800 disclosed?
CVE-2023-53800 was first published in the National Vulnerability Database on December 9, 2025, with the most recent update on August 5, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2023-53800 actively exploited?
CVE-2023-53800 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 97.5% of all scored CVEs.
What is the CVSS score of CVE-2023-53800?
CVE-2023-53800 has a CVSS v4.0 base score of 7.8 (CNA self-assessment; NVD's own analysis pending).
How do I remediate CVE-2023-53800?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2023-53800, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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