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NVD / CVE Program· CNA Linux

CVE-2023-53800: ubi: Fix use-after-free when volume resizing failed

Noroxi assessment

Priority: Monitor (action score 31/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.13% (FIRST EPSS).
  • Someone with local access to the system can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: Linux Linux 35f8d4064e54c18424db2997059d4c0b1d13d093, 3d6378f7056ac7350338f941001162a8f660853c, 53818746e549e61841428892a8d94344494be797.

Low priority for now. Upgrade to Linux Linux 35f8d4064e54c18424db2997059d4c0b1d13d093, 3d6378f7056ac7350338f941001162a8f660853c, 53818746e549e61841428892a8d94344494be797 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

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.

HighCVSS 7.8 · v3.1—No exploit Fix available
Published
Dec 9, 2025
Updated
Oct 15, 2026
EPSS
0.1% · 3th percentile
CWE
—

Report tools

JSON

Action score

31

Monitor

Low priority for now.

CVSS
31 / 40 · 7.8 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.1%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
total

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · Linux
7.8
NVD has not scored this yet; the score shown is the CNA’s.

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

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When you'll hear from us

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  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

—

Versions reported by the vendor

Affected version ranges reported by the assigning authority (Linux). Independent of NVD's CPE analysis and usually ahead of it.

  • Linux Linux

    • 2.6.22affected
    • 801c135ce73d5df1caf3eca35b66a10824ae0707 and later · before bf9875aa7f7d624a8c084425b14bf7e5907ebc30affected · git
    • 801c135ce73d5df1caf3eca35b66a10824ae0707 and later · before bf795ebbb9995e2fe7945de71177f01c2f1215dcaffected · git
    • 801c135ce73d5df1caf3eca35b66a10824ae0707 and later · before 9c8be1f165baee53b5a36ea0b3c9281d403a1d0baffected · git
    • 801c135ce73d5df1caf3eca35b66a10824ae0707 and later · before 35f8d4064e54c18424db2997059d4c0b1d13d093affected · git
    • 801c135ce73d5df1caf3eca35b66a10824ae0707 and later · before 53818746e549e61841428892a8d94344494be797affected · git
    • 801c135ce73d5df1caf3eca35b66a10824ae0707 and later · before b0c951742348d216f094d16ed4f70ae73db881c0affected · git
    • 801c135ce73d5df1caf3eca35b66a10824ae0707 and later · before 3d6378f7056ac7350338f941001162a8f660853caffected · git
    • 801c135ce73d5df1caf3eca35b66a10824ae0707 and later · before 9af31d6ec1a4be4caab2550096c6bd2ba8fba472affected · git
    • before 2.6.22not affected · semver

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.20-16.1.20-1

Same product

linux: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-74705udp: fix potential use-after-free in tunnel segmentation
    40Plan
  • CVE-2026-74612veth: fix skb length accounting after XDP frag adjustment
    40Plan
  • CVE-2026-74475vxlan: use neigh_ha_snapshot() in route_shortcircuit()
    40Plan

Published before and after this one in the same product

  • ← EarlierCVE-2023-53790Dec 9, 2025 · bpf: Zeroing allocated object from slab in bpf memory allocator
    31Monitor
  • ← EarlierCVE-2023-53794Dec 9, 2025 · cifs: fix session state check in reconnect to avoid use-after-free issue
    39Monitor
  • Later →CVE-2023-53803Dec 9, 2025 · scsi: ses: Fix slab-out-of-bounds in ses_enclosure_data_process()
    32Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
Linux Linux35f8d4064e54c18424db2997059d4c0b1d13d093Vendor (CNA)
Linux Linux3d6378f7056ac7350338f941001162a8f660853cVendor (CNA)
Linux Linux53818746e549e61841428892a8d94344494be797Vendor (CNA)
Linux Linux9af31d6ec1a4be4caab2550096c6bd2ba8fba472Vendor (CNA)
Linux Linux9c8be1f165baee53b5a36ea0b3c9281d403a1d0bVendor (CNA)
Linux Linuxb0c951742348d216f094d16ed4f70ae73db881c0Vendor (CNA)
Linux Linuxbf795ebbb9995e2fe7945de71177f01c2f1215dcVendor (CNA)
Linux Linuxbf9875aa7f7d624a8c084425b14bf7e5907ebc30Vendor (CNA)
debian:linux6.1.20-1 · Debian:12Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

No history yet (it accumulates with the daily EPSS job).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Someone with local access to the system can trigger it.
  • A low-privileged account is enough.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
high · data can be read
Integrity
high · data or configuration can be modified
Availability
high · the service can be disrupted
Attack vector
Local
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
High
Availability impact
High

Weakness class (CWE)

—

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

nvd-secondary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

  1. SSVC exploitation— → none
  2. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (7 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records