Linux Kernel up to 6.4.10 alauda_check_media uninitialized pointer

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CTI Interest Score
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4.4$0-$5k0.00

Summaryinfo

A vulnerability classified as critical was found in Linux Kernel up to 6.4.10. The affected element is the function alauda_check_media. Executing a manipulation can lead to uninitialized pointer. This vulnerability appears as CVE-2023-53847. There is no available exploit. Upgrading the affected component is advised.

Detailsinfo

A vulnerability was found in Linux Kernel up to 6.4.10. It has been declared as critical. This vulnerability affects the function alauda_check_media. The manipulation with an unknown input leads to a uninitialized pointer vulnerability. The CWE definition for the vulnerability is CWE-824. The product accesses or uses a pointer that has not been initialized. The impact remains unknown. CVE summarizes:

In the Linux kernel, the following vulnerability has been resolved: usb-storage: alauda: Fix uninit-value in alauda_check_media() Syzbot got KMSAN to complain about access to an uninitialized value in the alauda subdriver of usb-storage: BUG: KMSAN: uninit-value in alauda_transport+0x462/0x57f0 drivers/usb/storage/alauda.c:1137 CPU: 0 PID: 12279 Comm: usb-storage Not tainted 5.3.0-rc7+ #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x191/0x1f0 lib/dump_stack.c:113 kmsan_report+0x13a/0x2b0 mm/kmsan/kmsan_report.c:108 __msan_warning+0x73/0xe0 mm/kmsan/kmsan_instr.c:250 alauda_check_media+0x344/0x3310 drivers/usb/storage/alauda.c:460 The problem is that alauda_check_media() doesn't verify that its USB transfer succeeded before trying to use the received data. What should happen if the transfer fails isn't entirely clear, but a reasonably conservative approach is to pretend that no media is present. A similar problem exists in a usb_stor_dbg() call in alauda_get_media_status(). In this case, when an error occurs the call is redundant, because usb_stor_ctrl_transfer() already will print a debugging message. Finally, unrelated to the uninitialized memory access, is the fact that alauda_check_media() performs DMA to a buffer on the stack. Fortunately usb-storage provides a general purpose DMA-able buffer for uses like this. We'll use it instead.

The advisory is available at git.kernel.org. This vulnerability was named CVE-2023-53847 since 12/09/2025. The exploitation appears to be difficult. Technical details are known, but there is no available exploit. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 03/30/2026).

The vulnerability scanner Nessus provides a plugin with the ID 278020 (Linux Distros Unpatched Vulnerability : CVE-2023-53847), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 4.14.323, 4.19.292, 5.4.254, 5.10.191, 5.15.127, 6.1.46 or 6.4.11 eliminates this vulnerability. Applying the patch 153c3e85873cc3e2f387169783c3a227bad9a95a/49d380bcd6cba987c6085fae6464c9c087e8d9a0/044f4446e06bb03c52216697b14867ebc555ad3b/fe7c3a445d22783d27fe8bd0521a8aab1eb9da65/7a11d1e2625bdb2346f6586773b20b20977278ac/0d2d5282d39aed6f27dfe1ed60a5f3934ebd21cd/373e0ab8c4c516561493f1acf367c7ee7dc053c2/a6ff6e7a9dd69364547751db0f626a10a6d628d2 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 (278020) and CERT Bund (WID-SEC-2025-2765). If you want to get best quality of vulnerability data, you may have to visit VulDB.

Affected

  • Debian Linux
  • Amazon Linux 2
  • Red Hat Enterprise Linux
  • Ubuntu Linux
  • SUSE Linux
  • Oracle Linux
  • SUSE openSUSE
  • Open Source Linux Kernel
  • RESF Rocky Linux

Productinfo

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Version

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Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.6
VulDB Meta Temp Score: 4.4

VulDB Base Score: 4.6
VulDB Temp Score: 4.4
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

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

Exploitinginfo

Class: Uninitialized pointer
CWE: CWE-824 / CWE-908
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Partially

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 278020
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2023-53847

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kernel 4.14.323/4.19.292/5.4.254/5.10.191/5.15.127/6.1.46/6.4.11
Patch: 153c3e85873cc3e2f387169783c3a227bad9a95a/49d380bcd6cba987c6085fae6464c9c087e8d9a0/044f4446e06bb03c52216697b14867ebc555ad3b/fe7c3a445d22783d27fe8bd0521a8aab1eb9da65/7a11d1e2625bdb2346f6586773b20b20977278ac/0d2d5282d39aed6f27dfe1ed60a5f3934ebd21cd/373e0ab8c4c516561493f1acf367c7ee7dc053c2/a6ff6e7a9dd69364547751db0f626a10a6d628d2

Timelineinfo

12/09/2025 Advisory disclosed
12/09/2025 +0 days CVE reserved
12/09/2025 +0 days VulDB entry created
03/30/2026 +111 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2023-53847 (🔒)
GCVE (CVE): GCVE-0-2023-53847
GCVE (VulDB): GCVE-100-334978
CERT Bund: WID-SEC-2025-2765 - Linux Kernel: Mehrere Schwachstellen ermöglichen Denial of Service

Entryinfo

Created: 12/09/2025 09:14
Updated: 03/30/2026 02:59
Changes: 12/09/2025 09:14 (58), 12/10/2025 13:38 (2), 03/30/2026 02:59 (7)
Complete: 🔍
Cache ID: 216:EB8:103

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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