CVE-2026-74556: Software Security Vulnerability Vulnerability

CRITICAL
Advisory Identifier: GHSA-2m3x-37gx-2chv
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CVSS 9.8
Published
Advisory Summary

CVE-2026-74556 is a CRITICAL (CVSS 9.8) security vulnerability vulnerability (General Security Weakness) affecting Software libraries in the Maven ecosystem. Remediation is available in the latest vendor maintenance releases.

CVE-2026-74556 at a Glance

CVE Identifier CVE-2026-74556
GHSA Identifier GHSA-2m3x-37gx-2chv
Severity CRITICAL
CVSS v3.1 Base Score 9.8
CWE Classification General Security Weakness
Affected Product Software
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 9.8

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

How to Fix CVE-2026-74556

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-2026-74556, 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 General Security Weakness. 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: scsi: libiscsi_tcp: Bound SCSI Response data segment to the connection buffer iscsi_tcp_hdr_dissect() receives the data segment of several PDU types into the fixed-size conn->data buffer, which is allocated for ISCSI_DEF_MAX_RECV_SEG_LEN (8192) bytes. For the LOGIN_RSP, TEXT_RSP, REJECT and ASYNC_EVENT opcodes the dissect path already rejects a PDU whose DataSegmentLength exceeds that buffer. The SCSI Command Response (ISCSI_OP_SCSI_CMD_RSP) path also copies its data segment (sense/response data) into conn->data via iscsi_tcp_data_recv_prep(), but it does so without the same check. The only upstream bound on in.datalen is conn->max_recv_dlength, the initiator's advertised MaxRecvDataSegmentLength, which is commonly negotiated well above 8192 (open-iscsi defaults to 262144). A target that returns a SCSI Response with a DataSegmentLength between 8193 and max_recv_dlength therefore overflows the 8192-byte conn->data buffer. Once the same bound applies, ISCSI_OP_SCSI_CMD_RSP is handled exactly like those responses: bound the data segment, receive it into conn->data when present, and otherwise complete the PDU with no data. Fold the opcode into that case group rather than duplicating the check.

References

NVD — CVE-2026-74556 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-74556
git.kernel.org/stable/c/084af02536... WEB
https://git.kernel.org/stable/c/084af0253673425ce2ae62e3c7f74f0dd023711b
git.kernel.org/stable/c/7281574171... WEB
https://git.kernel.org/stable/c/72815741715bd41556dac5eeb068bf0f8af06ee7
git.kernel.org/stable/c/a518128420... WEB
https://git.kernel.org/stable/c/a51812842084fd390590ab8dc0431f10c73ddc56
git.kernel.org/stable/c/a8f94cc9f0... WEB
https://git.kernel.org/stable/c/a8f94cc9f0e5759252551be3a172960c57f21f54
git.kernel.org/stable/c/b0aa3e8e2a... WEB
https://git.kernel.org/stable/c/b0aa3e8e2ab4ca92adb28a3ef41873b3363b8676
git.kernel.org/stable/c/c1dea15f81... WEB
https://git.kernel.org/stable/c/c1dea15f819cded9b3faf58f8bec72323568b6e6
git.kernel.org/stable/c/c97b5265cc... WEB
https://git.kernel.org/stable/c/c97b5265cc47775f77fd2a23d6bde0426997b233
git.kernel.org/stable/c/f1a3a51fc5... WEB
https://git.kernel.org/stable/c/f1a3a51fc5dba0e99532379665069f1700da6b44

Frequently Asked Questions

What is CVE-2026-74556?
CVE-2026-74556 is a security vulnerability in Software classified as a security vulnerability vulnerability under General Security Weakness.
Which Software versions are affected?
Affected versions include releases prior to current release patches.
What version fixes CVE-2026-74556?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What is the CVSS score of CVE-2026-74556?
CVE-2026-74556 has a CVSS v3.1 base score of 9.8 (CRITICAL) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
What CWE is associated with CVE-2026-74556?
CVE-2026-74556 is classified under General Security Weakness.
How can I check Maven dependencies for CVE-2026-74556?
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-2m3x-37gx-2chv",
  "modified" : "2026-08-19T18:32:32Z",
  "published" : "2026-08-15T15:30:36Z",
  "aliases" : [ "CVE-2026-74556" ],
  "details" : "In the Linux kernel, the following vulnerability has been resolved:\n\nscsi: libiscsi_tcp: Bound SCSI Response data segment to the connection buffer\n\niscsi_tcp_hdr_dissect() receives the data segment of several PDU types\ninto the fixed-size conn->data buffer, which is allocated for\nISCSI_DEF_MAX_RECV_SEG_LEN (8192) bytes.  For the LOGIN_RSP, TEXT_RSP,\nREJECT and ASYNC_EVENT opcodes the dissect path already rejects a PDU\nwhose DataSegmentLength exceeds that buffer.\n\nThe SCSI Command Response (ISCSI_OP_SCSI_CMD_RSP) path also copies its\ndata segment (sense/response data) into conn->data via\niscsi_tcp_data_recv_prep(), but it does so without the same check.  The\nonly upstream bound on in.datalen is conn->max_recv_dlength, the\ninitiator's advertised MaxRecvDataSegmentLength, which is commonly\nnegotiated well above 8192 (open-iscsi defaults to 262144).  A target\nthat returns a SCSI Response with a DataSegmentLength between 8193 and\nmax_recv_dlength therefore overflows the 8192-byte conn->data buffer.\n\nOnce the same bound applies, ISCSI_OP_SCSI_CMD_RSP is handled exactly\nlike those responses: bound the data segment, receive it into conn->data\nwhen present, and otherwise complete the PDU with no data.  Fold the\nopcode into that case group rather than duplicating the check.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
  } ],
  "affected" : [ ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-74556"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/084af0253673425ce2ae62e3c7f74f0dd023711b"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/72815741715bd41556dac5eeb068bf0f8af06ee7"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/a51812842084fd390590ab8dc0431f10c73ddc56"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/a8f94cc9f0e5759252551be3a172960c57f21f54"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/b0aa3e8e2ab4ca92adb28a3ef41873b3363b8676"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/c1dea15f819cded9b3faf58f8bec72323568b6e6"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/c97b5265cc47775f77fd2a23d6bde0426997b233"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/f1a3a51fc5dba0e99532379665069f1700da6b44"
  } ],
  "database_specific" : {
    "cwe_ids" : [ ],
    "severity" : "CRITICAL",
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-08-15T13:18:01Z"
  }
}