Linux Kernel 6.3 io_pagetable.c iopt_unmap_iova_range use after free

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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5.0$5k-$25k0.00

Summaryinfo

A vulnerability classified as critical has been found in Linux Kernel 6.3. Affected is the function iopt_unmap_iova_range of the file drivers/iommu/iommufd/io_pagetable.c. The manipulation leads to use after free. This vulnerability is listed as CVE-2023-33250. There is no available exploit.

Detailsinfo

A vulnerability was found in Linux Kernel 6.3 (Operating System) and classified as critical. This issue affects the function iopt_unmap_iova_range of the file drivers/iommu/iommufd/io_pagetable.c. The manipulation with an unknown input leads to a use after free vulnerability. Using CWE to declare the problem leads to CWE-416. Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

The Linux kernel 6.3 has a use-after-free in iopt_unmap_iova_range in drivers/iommu/iommufd/io_pagetable.c.

The weakness was presented 05/22/2023. The advisory is shared at groups.google.com. The identification of this vulnerability is CVE-2023-33250 since 05/21/2023. Technical details are known, but no exploit is available. The price for an exploit might be around USD $5k-$25k at the moment (estimation calculated on 01/03/2026).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2023-37418). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.0
VulDB Meta Temp Score: 5.0

VulDB Base Score: 5.5
VulDB Temp Score: 5.5
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 4.4
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Use after free
CWE: CWE-416 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: Partially

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

05/21/2023 🔍
05/22/2023 +1 days 🔍
05/22/2023 +0 days 🔍
01/03/2026 +957 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: groups.google.com
Status: Not defined

CVE: CVE-2023-33250 (🔍)
GCVE (CVE): GCVE-0-2023-33250
GCVE (VulDB): GCVE-100-229613
EUVD: 🔍

Entryinfo

Created: 05/22/2023 07:01
Updated: 01/03/2026 22:42
Changes: 05/22/2023 07:01 (39), 06/15/2023 14:12 (11), 03/18/2025 20:26 (22), 01/03/2026 22:42 (1)
Complete: 🔍
Cache ID: 216::103

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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