CVE-2023-52856: Software Security Vulnerability Vulnerability

MODERATE
Advisory Identifier: GHSA-3qr9-g9f2-22xh
Share
CVSS 5.5
CWE-476
Published
Advisory Summary

CVE-2023-52856 is a MODERATE (CVSS 5.5) security vulnerability vulnerability (CWE-476: NULL Pointer Dereference) affecting Software libraries in the Maven ecosystem. The weakness occurs when the product dereferences a pointer that it expects to be valid but is null.. Remediation is available in the latest vendor maintenance releases.

CVE-2023-52856 at a Glance

CVE Identifier CVE-2023-52856
GHSA Identifier GHSA-3qr9-g9f2-22xh
Severity MODERATE
CVSS v3.1 Base Score 5.5
CWE Classification CWE-476: NULL Pointer Dereference
Affected Product Software
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 5.5

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H).

Attack Vector Local (AV:L)
Attack Complexity Low (AC:L)
Privileges Required Low (PR:L)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality None (C:N)
Integrity None (I:N)
Availability High (A:H)

How to Fix CVE-2023-52856

To remediate this vulnerability, upgrade all affected Software dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

mvn dependency:tree

How to Check if You Are Affected

To determine whether your Java application is affected by CVE-2023-52856, inspect your build dependencies using the Maven Dependency Plugin:

mvn dependency:tree

Analyze the terminal output to locate any version of Software in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than the patched release), your application is affected.

Note: The mvn dependency:tree command inspects the resolved dependency graph declared in your project's POM files; it does not perform automated security scanning or inspect runtime dynamic classpaths. Always verify runtime container classpaths and shaded JARs.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-476: NULL Pointer Dereference, where the product dereferences a pointer that it expects to be valid but is null. In Software, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

In the Linux kernel, the following vulnerability has been resolved: drm/bridge: lt8912b: Fix crash on bridge detach The lt8912b driver, in its bridge detach function, calls drm_connector_unregister() and drm_connector_cleanup(). drm_connector_unregister() should be called only for connectors explicitly registered with drm_connector_register(), which is not the case in lt8912b. The driver's drm_connector_funcs.destroy hook is set to drm_connector_cleanup(). Thus the driver should not call either drm_connector_unregister() nor drm_connector_cleanup() in its lt8912_bridge_detach(), as they cause a crash on bridge detach: Unable to handle kernel NULL pointer dereference at virtual address 0000000000000000 Mem abort info: ESR = 0x0000000096000006 EC = 0x25: DABT (current EL), IL = 32 bits SET = 0, FnV = 0 EA = 0, S1PTW = 0 FSC = 0x06: level 2 translation fault Data abort info: ISV = 0, ISS = 0x00000006, ISS2 = 0x00000000 CM = 0, WnR = 0, TnD = 0, TagAccess = 0 GCS = 0, Overlay = 0, DirtyBit = 0, Xs = 0 user pgtable: 4k pages, 48-bit VAs, pgdp=00000000858f3000 [0000000000000000] pgd=0800000085918003, p4d=0800000085918003, pud=0800000085431003, pmd=0000000000000000 Internal error: Oops: 0000000096000006 [#1] PREEMPT SMP Modules linked in: tidss(-) display_connector lontium_lt8912b tc358768 panel_lvds panel_simple drm_dma_helper drm_kms_helper drm drm_panel_orientation_quirks CPU: 3 PID: 462 Comm: rmmod Tainted: G W 6.5.0-rc2+ #2 Hardware name: Toradex Verdin AM62 on Verdin Development Board (DT) pstate: 80000005 (Nzcv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : drm_connector_cleanup+0x78/0x2d4 [drm] lr : lt8912_bridge_detach+0x54/0x6c [lontium_lt8912b] sp : ffff800082ed3a90 x29: ffff800082ed3a90 x28: ffff0000040c1940 x27: 0000000000000000 x26: 0000000000000000 x25: dead000000000122 x24: dead000000000122 x23: dead000000000100 x22: ffff000003fb6388 x21: 0000000000000000 x20: 0000000000000000 x19: ffff000003fb6260 x18: fffffffffffe56e8 x17: 0000000000000000 x16: 0010000000000000 x15: 0000000000000038 x14: 0000000000000000 x13: ffff800081914b48 x12: 000000000000040e x11: 000000000000015a x10: ffff80008196ebb8 x9 : ffff800081914b48 x8 : 00000000ffffefff x7 : ffff0000040c1940 x6 : ffff80007aa649d0 x5 : 0000000000000000 x4 : 0000000000000001 x3 : ffff80008159e008 x2 : 0000000000000000 x1 : 0000000000000000 x0 : 0000000000000000 Call trace: drm_connector_cleanup+0x78/0x2d4 [drm] lt8912_bridge_detach+0x54/0x6c [lontium_lt8912b] drm_bridge_detach+0x44/0x84 [drm] drm_encoder_cleanup+0x40/0xb8 [drm] drmm_encoder_alloc_release+0x1c/0x30 [drm] drm_managed_release+0xac/0x148 [drm] drm_dev_put.part.0+0x88/0xb8 [drm] devm_drm_dev_init_release+0x14/0x24 [drm] devm_action_release+0x14/0x20 release_nodes+0x5c/0x90 devres_release_all+0x8c/0xe0 device_unbind_cleanup+0x18/0x68 device_release_driver_internal+0x208/0x23c driver_detach+0x4c/0x94 bus_remove_driver+0x70/0xf4 driver_unregister+0x30/0x60 platform_driver_unregister+0x14/0x20 tidss_platform_driver_exit+0x18/0xb2c [tidss] __arm64_sys_delete_module+0x1a0/0x2b4 invoke_syscall+0x48/0x110 el0_svc_common.constprop.0+0x60/0x10c do_el0_svc_compat+0x1c/0x40 el0_svc_compat+0x40/0xac el0t_32_sync_handler+0xb0/0x138 el0t_32_sync+0x194/0x198 Code: 9104a276 f2fbd5b7 aa0203e1 91008af8 (f85c0420)

References

NVD — CVE-2023-52856 NVD
https://nvd.nist.gov/vuln/detail/CVE-2023-52856
git.kernel.org/stable/c/42071feab7... WEB
https://git.kernel.org/stable/c/42071feab712ba2a139b8928f7e0f8d3a6fc719e
git.kernel.org/stable/c/4428399314... WEB
https://git.kernel.org/stable/c/44283993144a03af9df31934d6c32bbd42d1a347
git.kernel.org/stable/c/7bf0cb8f40... WEB
https://git.kernel.org/stable/c/7bf0cb8f40280a85034990dfe42be8ca8f80f37a
git.kernel.org/stable/c/b65e3249f3... WEB
https://git.kernel.org/stable/c/b65e3249f3ca96e3c736af889461d80d675feab6
git.kernel.org/stable/c/fcd9895e36... WEB
https://git.kernel.org/stable/c/fcd9895e365474709844eeb31cfe53d912c3596e

Frequently Asked Questions

What is CVE-2023-52856?
CVE-2023-52856 is a security vulnerability in Software classified as a security vulnerability vulnerability under CWE-476: NULL Pointer Dereference.
Which Software versions are affected?
Affected versions include releases prior to current release patches.
What version fixes CVE-2023-52856?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What is the CVSS score of CVE-2023-52856?
CVE-2023-52856 has a CVSS v3.1 base score of 5.5 (MODERATE) with vector string CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
What CWE is associated with CVE-2023-52856?
CVE-2023-52856 is classified under CWE-476: NULL Pointer Dereference (The product dereferences a pointer that it expects to be valid but is NULL.).
How can I check Maven dependencies for CVE-2023-52856?
Run the dependency tree command: 'mvn dependency:tree'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-3qr9-g9f2-22xh",
  "modified" : "2025-01-31T18:31:02Z",
  "published" : "2024-05-21T18:31:22Z",
  "aliases" : [ "CVE-2023-52856" ],
  "details" : "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/bridge: lt8912b: Fix crash on bridge detach\n\nThe lt8912b driver, in its bridge detach function, calls\ndrm_connector_unregister() and drm_connector_cleanup().\n\ndrm_connector_unregister() should be called only for connectors\nexplicitly registered with drm_connector_register(), which is not the\ncase in lt8912b.\n\nThe driver's drm_connector_funcs.destroy hook is set to\ndrm_connector_cleanup().\n\nThus the driver should not call either drm_connector_unregister() nor\ndrm_connector_cleanup() in its lt8912_bridge_detach(), as they cause a\ncrash on bridge detach:\n\nUnable to handle kernel NULL pointer dereference at virtual address 0000000000000000\nMem abort info:\n  ESR = 0x0000000096000006\n  EC = 0x25: DABT (current EL), IL = 32 bits\n  SET = 0, FnV = 0\n  EA = 0, S1PTW = 0\n  FSC = 0x06: level 2 translation fault\nData abort info:\n  ISV = 0, ISS = 0x00000006, ISS2 = 0x00000000\n  CM = 0, WnR = 0, TnD = 0, TagAccess = 0\n  GCS = 0, Overlay = 0, DirtyBit = 0, Xs = 0\nuser pgtable: 4k pages, 48-bit VAs, pgdp=00000000858f3000\n[0000000000000000] pgd=0800000085918003, p4d=0800000085918003, pud=0800000085431003, pmd=0000000000000000\nInternal error: Oops: 0000000096000006 [#1] PREEMPT SMP\nModules linked in: tidss(-) display_connector lontium_lt8912b tc358768 panel_lvds panel_simple drm_dma_helper drm_kms_helper drm drm_panel_orientation_quirks\nCPU: 3 PID: 462 Comm: rmmod Tainted: G        W          6.5.0-rc2+ #2\nHardware name: Toradex Verdin AM62 on Verdin Development Board (DT)\npstate: 80000005 (Nzcv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--)\npc : drm_connector_cleanup+0x78/0x2d4 [drm]\nlr : lt8912_bridge_detach+0x54/0x6c [lontium_lt8912b]\nsp : ffff800082ed3a90\nx29: ffff800082ed3a90 x28: ffff0000040c1940 x27: 0000000000000000\nx26: 0000000000000000 x25: dead000000000122 x24: dead000000000122\nx23: dead000000000100 x22: ffff000003fb6388 x21: 0000000000000000\nx20: 0000000000000000 x19: ffff000003fb6260 x18: fffffffffffe56e8\nx17: 0000000000000000 x16: 0010000000000000 x15: 0000000000000038\nx14: 0000000000000000 x13: ffff800081914b48 x12: 000000000000040e\nx11: 000000000000015a x10: ffff80008196ebb8 x9 : ffff800081914b48\nx8 : 00000000ffffefff x7 : ffff0000040c1940 x6 : ffff80007aa649d0\nx5 : 0000000000000000 x4 : 0000000000000001 x3 : ffff80008159e008\nx2 : 0000000000000000 x1 : 0000000000000000 x0 : 0000000000000000\nCall trace:\n drm_connector_cleanup+0x78/0x2d4 [drm]\n lt8912_bridge_detach+0x54/0x6c [lontium_lt8912b]\n drm_bridge_detach+0x44/0x84 [drm]\n drm_encoder_cleanup+0x40/0xb8 [drm]\n drmm_encoder_alloc_release+0x1c/0x30 [drm]\n drm_managed_release+0xac/0x148 [drm]\n drm_dev_put.part.0+0x88/0xb8 [drm]\n devm_drm_dev_init_release+0x14/0x24 [drm]\n devm_action_release+0x14/0x20\n release_nodes+0x5c/0x90\n devres_release_all+0x8c/0xe0\n device_unbind_cleanup+0x18/0x68\n device_release_driver_internal+0x208/0x23c\n driver_detach+0x4c/0x94\n bus_remove_driver+0x70/0xf4\n driver_unregister+0x30/0x60\n platform_driver_unregister+0x14/0x20\n tidss_platform_driver_exit+0x18/0xb2c [tidss]\n __arm64_sys_delete_module+0x1a0/0x2b4\n invoke_syscall+0x48/0x110\n el0_svc_common.constprop.0+0x60/0x10c\n do_el0_svc_compat+0x1c/0x40\n el0_svc_compat+0x40/0xac\n el0t_32_sync_handler+0xb0/0x138\n el0t_32_sync+0x194/0x198\nCode: 9104a276 f2fbd5b7 aa0203e1 91008af8 (f85c0420)",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"
  } ],
  "affected" : [ ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2023-52856"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/42071feab712ba2a139b8928f7e0f8d3a6fc719e"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/44283993144a03af9df31934d6c32bbd42d1a347"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/7bf0cb8f40280a85034990dfe42be8ca8f80f37a"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/b65e3249f3ca96e3c736af889461d80d675feab6"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/fcd9895e365474709844eeb31cfe53d912c3596e"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-476" ],
    "severity" : "MODERATE",
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2024-05-21T16:15:22Z"
  }
}