CVE-2026-52957: Software Security Vulnerability Vulnerability

HIGH
Advisory Identifier: GHSA-7qv9-42rg-qh56
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CVSS 7.5
CWE-476
Published
Advisory Summary

CVE-2026-52957 is a HIGH (CVSS 7.5) 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-2026-52957 at a Glance

CVE Identifier CVE-2026-52957
GHSA Identifier GHSA-7qv9-42rg-qh56
Severity HIGH
CVSS v3.1 Base Score 7.5
CWE Classification CWE-476: NULL Pointer Dereference
Affected Product Software
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 7.5

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

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required None (PR:N)
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-2026-52957

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-2026-52957, 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: libceph: Fix potential null-ptr-deref in decode_choose_args() A message of type CEPH_MSG_OSD_MAP contains an OSD map that itself contains a CRUSH map. When decoding this CRUSH map in crush_decode(), an array of max_buckets CRUSH buckets is decoded, where some indices may not refer to actual buckets and are therefore set to NULL. The received CRUSH map may optionally contain choose_args that get decoded in decode_choose_args(). When decoding a crush_choose_arg_map, a series of choose_args for different buckets is decoded, with the bucket_index being read from the incoming message. It is only checked that the bucket index does not exceed max_buckets, but not that it doesn't point to an index with a NULL bucket. If a (potentially corrupted) message contains a crush_choose_arg_map including such a bucket_index, a null pointer dereference may occur in the subsequent processing when attempting to access the bucket with the given index. This patch fixes the issue by extending the affected check. Now, it is only attempted to access the bucket if it is not NULL.

References

NVD — CVE-2026-52957 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-52957
git.kernel.org/stable/c/28b0a2ab8c... WEB
https://git.kernel.org/stable/c/28b0a2ab8c82d0bbdeb8013029c67c978ce6e4bf
git.kernel.org/stable/c/301286c0cc... WEB
https://git.kernel.org/stable/c/301286c0ccd37d66b0e40786fd35a4f19cdbd88a
git.kernel.org/stable/c/312ec973ef... WEB
https://git.kernel.org/stable/c/312ec973efac0efb9b9ed64214235910e9ecbaa8
git.kernel.org/stable/c/7169f326a2... WEB
https://git.kernel.org/stable/c/7169f326a23d0f547fcd90e68b72fd387622e126
git.kernel.org/stable/c/a20e16ebfe... WEB
https://git.kernel.org/stable/c/a20e16ebfe2fa65348eb4b2dc7deac330ce03e9c
git.kernel.org/stable/c/d55ffad8d4... WEB
https://git.kernel.org/stable/c/d55ffad8d422b5d1cc44dad32bd3d25f4471cd9f
git.kernel.org/stable/c/d7a65a34d2... WEB
https://git.kernel.org/stable/c/d7a65a34d2453f8cd3e0cc0e1319740af7e24276
git.kernel.org/stable/c/f2f95e6d4b... WEB
https://git.kernel.org/stable/c/f2f95e6d4b97e70bb876139b0583fc8079983f85

Frequently Asked Questions

What is CVE-2026-52957?
CVE-2026-52957 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-2026-52957?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What is the CVSS score of CVE-2026-52957?
CVE-2026-52957 has a CVSS v3.1 base score of 7.5 (HIGH) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
What CWE is associated with CVE-2026-52957?
CVE-2026-52957 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-2026-52957?
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 
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  "id" : "GHSA-7qv9-42rg-qh56",
  "modified" : "2026-06-28T09:31:37Z",
  "published" : "2026-06-24T18:32:41Z",
  "aliases" : [ "CVE-2026-52957" ],
  "details" : "In the Linux kernel, the following vulnerability has been resolved:\n\nlibceph: Fix potential null-ptr-deref in decode_choose_args()\n\nA message of type CEPH_MSG_OSD_MAP contains an OSD map that itself\ncontains a CRUSH map. When decoding this CRUSH map in crush_decode(), an\narray of max_buckets CRUSH buckets is decoded, where some indices may\nnot refer to actual buckets and are therefore set to NULL. The received\nCRUSH map may optionally contain choose_args that get decoded in\ndecode_choose_args(). When decoding a crush_choose_arg_map, a series of\nchoose_args for different buckets is decoded, with the bucket_index\nbeing read from the incoming message. It is only checked that the bucket\nindex does not exceed max_buckets, but not that it doesn't point to an\nindex with a NULL bucket. If a (potentially corrupted) message contains\na crush_choose_arg_map including such a bucket_index, a null pointer\ndereference may occur in the subsequent processing when attempting to\naccess the bucket with the given index.\n\nThis patch fixes the issue by extending the affected check. Now, it is\nonly attempted to access the bucket if it is not NULL.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
  } ],
  "affected" : [ ],
  "references" : [ {
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  }, {
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    "url" : "https://git.kernel.org/stable/c/28b0a2ab8c82d0bbdeb8013029c67c978ce6e4bf"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/301286c0ccd37d66b0e40786fd35a4f19cdbd88a"
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    "type" : "WEB",
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  }, {
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    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/a20e16ebfe2fa65348eb4b2dc7deac330ce03e9c"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/d55ffad8d422b5d1cc44dad32bd3d25f4471cd9f"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/d7a65a34d2453f8cd3e0cc0e1319740af7e24276"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/f2f95e6d4b97e70bb876139b0583fc8079983f85"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-476" ],
    "severity" : "HIGH",
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-06-24T17:17:05Z"
  }
}