CVE-2026-43205: Software Security Vulnerability Vulnerability

HIGH
Advisory Identifier: GHSA-v2hq-m36p-4jr3
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CVSS 7.8
CWE-787
Published
Advisory Summary

CVE-2026-43205 is a HIGH (CVSS 7.8) security vulnerability vulnerability (CWE-787: Out-of-bounds Write) affecting Software libraries in the Maven ecosystem. The weakness occurs when the product writes data past the end, or before the beginning, of the intended buffer.. Remediation is available in the latest vendor maintenance releases.

CVE-2026-43205 at a Glance

CVE Identifier CVE-2026-43205
GHSA Identifier GHSA-v2hq-m36p-4jr3
Severity HIGH
CVSS v3.1 Base Score 7.8
CWE Classification CWE-787: Out-of-bounds Write
Affected Product Software
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 7.8

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:H/I:H/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 High (C:H)
Integrity High (I:H)
Availability High (A:H)

How to Fix CVE-2026-43205

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-2026-43205, 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-787: Out-of-bounds Write, where the product writes data past the end, or before the beginning, of the intended buffer. 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: dpaa2-switch: validate num_ifs to prevent out-of-bounds write The driver obtains sw_attr.num_ifs from firmware via dpsw_get_attributes() but never validates it against DPSW_MAX_IF (64). This value controls iteration in dpaa2_switch_fdb_get_flood_cfg(), which writes port indices into the fixed-size cfg->if_id[DPSW_MAX_IF] array. When firmware reports num_ifs >= 64, the loop can write past the array bounds. Add a bound check for num_ifs in dpaa2_switch_init(). dpaa2_switch_fdb_get_flood_cfg() appends the control interface (port num_ifs) after all matched ports. When num_ifs == DPSW_MAX_IF and all ports match the flood filter, the loop fills all 64 slots and the control interface write overflows by one entry. The check uses >= because num_ifs == DPSW_MAX_IF is also functionally broken. build_if_id_bitmap() silently drops any ID >= 64: if (id[i] < DPSW_MAX_IF) bmap[id[i] / 64] |= ...

References

NVD — CVE-2026-43205 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-43205
git.kernel.org/stable/c/89764cf445... WEB
https://git.kernel.org/stable/c/89764cf44544e943230f5e03b8c40a90da26537c
git.kernel.org/stable/c/8a5752c6dc... WEB
https://git.kernel.org/stable/c/8a5752c6dcc085a3bfc78589925182e4e98468c5
git.kernel.org/stable/c/8b841fd529... WEB
https://git.kernel.org/stable/c/8b841fd529db9faf8bc678d429d4bf4e98b10900
git.kernel.org/stable/c/a26dda3bae... WEB
https://git.kernel.org/stable/c/a26dda3bae469c8e4e1b1993ad33dafa32d0fc28
git.kernel.org/stable/c/a3034a8d56... WEB
https://git.kernel.org/stable/c/a3034a8d56174dd6464c46823438f25797910a8d
git.kernel.org/stable/c/b690635d47... WEB
https://git.kernel.org/stable/c/b690635d4719214892855b79ce018d4b1672ac96
git.kernel.org/stable/c/c18493f750... WEB
https://git.kernel.org/stable/c/c18493f750208eb4ff1198fc5a02786b8b2d70a6

Frequently Asked Questions

What is CVE-2026-43205?
CVE-2026-43205 is a security vulnerability in Software classified as a security vulnerability vulnerability under CWE-787: Out-of-bounds Write.
Which Software versions are affected?
Affected versions include releases prior to current release patches.
What version fixes CVE-2026-43205?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What is the CVSS score of CVE-2026-43205?
CVE-2026-43205 has a CVSS v3.1 base score of 7.8 (HIGH) with vector string CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
What CWE is associated with CVE-2026-43205?
CVE-2026-43205 is classified under CWE-787: Out-of-bounds Write (The product writes data past the end, or before the beginning, of the intended buffer.).
How can I check Maven dependencies for CVE-2026-43205?
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-v2hq-m36p-4jr3",
  "modified" : "2026-05-11T21:31:30Z",
  "published" : "2026-05-06T12:30:33Z",
  "aliases" : [ "CVE-2026-43205" ],
  "details" : "In the Linux kernel, the following vulnerability has been resolved:\n\ndpaa2-switch: validate num_ifs to prevent out-of-bounds write\n\nThe driver obtains sw_attr.num_ifs from firmware via dpsw_get_attributes()\nbut never validates it against DPSW_MAX_IF (64). This value controls\niteration in dpaa2_switch_fdb_get_flood_cfg(), which writes port indices\ninto the fixed-size cfg->if_id[DPSW_MAX_IF] array. When firmware reports\nnum_ifs >= 64, the loop can write past the array bounds.\n\nAdd a bound check for num_ifs in dpaa2_switch_init().\n\ndpaa2_switch_fdb_get_flood_cfg() appends the control interface (port\nnum_ifs) after all matched ports. When num_ifs == DPSW_MAX_IF and all\nports match the flood filter, the loop fills all 64 slots and the control\ninterface write overflows by one entry.\n\nThe check uses >= because num_ifs == DPSW_MAX_IF is also functionally\nbroken.\n\nbuild_if_id_bitmap() silently drops any ID >= 64:\n      if (id[i] < DPSW_MAX_IF)\n          bmap[id[i] / 64] |= ...",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
  } ],
  "affected" : [ ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-43205"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/89764cf44544e943230f5e03b8c40a90da26537c"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/8a5752c6dcc085a3bfc78589925182e4e98468c5"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/8b841fd529db9faf8bc678d429d4bf4e98b10900"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/a26dda3bae469c8e4e1b1993ad33dafa32d0fc28"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/a3034a8d56174dd6464c46823438f25797910a8d"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/b690635d4719214892855b79ce018d4b1672ac96"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/c18493f750208eb4ff1198fc5a02786b8b2d70a6"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-787" ],
    "severity" : "HIGH",
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-05-06T12:16:39Z"
  }
}