Linux Kernel up to 5.4.237/5.10.175/5.15.103/6.1.20/6.2.7 ext4 double free

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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6.5$0-$5k0.00

Summaryinfo

A vulnerability classified as critical has been found in Linux Kernel up to 5.4.237/5.10.175/5.15.103/6.1.20/6.2.7. This issue affects some unknown processing of the component ext4. This manipulation causes an unknown weakness. The identification of this vulnerability is CVE-2023-53626. There is no exploit available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability classified as critical was found in Linux Kernel up to 5.4.237/5.10.175/5.15.103/6.1.20/6.2.7. Affected by this vulnerability is some unknown processing of the component ext4. The CWE definition for the vulnerability is CWE-415. The product calls free() twice on the same memory address, potentially leading to modification of unexpected memory locations. The impact remains unknown. The summary by CVE is:

In the Linux kernel, the following vulnerability has been resolved: ext4: fix possible double unlock when moving a directory

The advisory is shared at git.kernel.org. This vulnerability is known as CVE-2023-53626 since 10/07/2025. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 03/01/2026).

The vulnerability scanner Nessus provides a plugin with the ID 274646 (Amazon Linux 2 : kernel, --advisory ALAS2-2025-3075 (ALAS-2025-3075)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 5.4.238, 5.10.176, 5.15.104, 6.1.21 or 6.2.8 eliminates this vulnerability. Applying the patch c16cbd8233d6c58fc488545393e49b5d55729990/1c93c42c7bb23057bde8a0a2ab834927ff64d20c/e71eb4dca41f0f36823724ced0406bb2dbdd5506/43ce288ab5d7274a4a141d7f5e3ed2ab7b41f8a2/70e42feab2e20618ddd0cbfc4ab4b08628236ecd is able to eliminate this problem. The bugfix is ready for download at git.kernel.org. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the databases at Tenable (274646) and CERT Bund (WID-SEC-2025-2229). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Affected

  • Amazon Linux 2
  • Red Hat Enterprise Linux
  • SUSE Linux
  • Oracle Linux
  • RESF Rocky Linux
  • Open Source Linux Kernel
  • IBM QRadar SIEM
  • Dell NetWorker

Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.6
VulDB Meta Temp Score: 6.5

VulDB Base Score: 5.5
VulDB Temp Score: 5.3
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 7.8
NVD Vector: 🔒

CVSSv2info

AVACAuCIA
💳💳💳💳💳💳
💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock

VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Double free
CWE: CWE-415 / CWE-119
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: Partially

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

0-DayUnlockUnlockUnlockUnlock
TodayUnlockUnlockUnlockUnlock

Nessus ID: 274646
Nessus Name: Amazon Linux 2 : kernel, --advisory ALAS2-2025-3075 (ALAS-2025-3075)

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kernel 5.4.238/5.10.176/5.15.104/6.1.21/6.2.8
Patch: c16cbd8233d6c58fc488545393e49b5d55729990/1c93c42c7bb23057bde8a0a2ab834927ff64d20c/e71eb4dca41f0f36823724ced0406bb2dbdd5506/43ce288ab5d7274a4a141d7f5e3ed2ab7b41f8a2/70e42feab2e20618ddd0cbfc4ab4b08628236ecd

Timelineinfo

10/07/2025 Advisory disclosed
10/07/2025 +0 days CVE reserved
10/07/2025 +0 days VulDB entry created
03/01/2026 +145 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2023-53626 (🔒)
GCVE (CVE): GCVE-0-2023-53626
GCVE (VulDB): GCVE-100-327529
CERT Bund: WID-SEC-2025-2229 - Linux Kernel: Mehrere Schwachstellen

Entryinfo

Created: 10/07/2025 19:33
Updated: 03/01/2026 09:31
Changes: 10/07/2025 19:33 (57), 11/11/2025 15:04 (2), 11/23/2025 00:18 (7), 12/22/2025 08:14 (1), 02/03/2026 23:51 (13), 03/01/2026 09:31 (1)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Discussion

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