CVE-2026-64270: Software Security Vulnerability Vulnerability

HIGH
Advisory Identifier: GHSA-q4qw-j7hr-9445
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CVSS 7.8
CWE-787
Published
Advisory Summary

CVE-2026-64270 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-2026-64270 at a Glance

CVE Identifier CVE-2026-64270
GHSA Identifier GHSA-q4qw-j7hr-9445
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-2026-64270

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-2026-64270, 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: Input: mms114 - reject an oversized device packet size mms114_interrupt() reads a packet of touch data from the device into a fixed-size on-stack buffer struct mms114_touch touch[MMS114_MAX_TOUCH]; which holds MMS114_MAX_TOUCH (10) events of MMS114_EVENT_SIZE (8) bytes, i.e. 80 bytes. The length of the I2C read into it is taken verbatim from the device: packet_size = mms114_read_reg(data, MMS114_PACKET_SIZE); if (packet_size <= 0) goto out; ... error = __mms114_read_reg(data, MMS114_INFORMATION, packet_size, (u8 *)touch); packet_size is a single device register byte (0x0F) and the only check is the lower bound packet_size <= 0; it is never bounded against the size of touch[]. A malfunctioning, malicious or counterfeit controller (or an attacker tampering with the I2C bus) can report a packet_size of up to 255, so __mms114_read_reg() writes up to 175 bytes past the end of touch[] on the IRQ-thread stack: a stack out-of-bounds write that can overwrite the stack canary, saved registers and the return address. A well-formed device never reports more than the buffer holds, so reject an oversized packet and drop the report, consistent with the handler's other error paths, rather than reading past the buffer.

References

NVD — CVE-2026-64270 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-64270
git.kernel.org/stable/c/040843281e... WEB
https://git.kernel.org/stable/c/040843281eebfa110d08fd7fb083fe6cb55cea14
git.kernel.org/stable/c/39b12daf1a... WEB
https://git.kernel.org/stable/c/39b12daf1adb80f9595fdfe584961deb80860cbb
git.kernel.org/stable/c/5d2ea15ba0... WEB
https://git.kernel.org/stable/c/5d2ea15ba03bf17ed143ff1a0995a4206edc3fb6
git.kernel.org/stable/c/66725039f7... WEB
https://git.kernel.org/stable/c/66725039f7090afe14c31bd259e2059a68f04023
git.kernel.org/stable/c/8301c33530... WEB
https://git.kernel.org/stable/c/8301c335305344d4da4ab9442b6a399dacfe5b8d
git.kernel.org/stable/c/b781507297... WEB
https://git.kernel.org/stable/c/b78150729762d47c14fe29a2582bdca5568e62b8
git.kernel.org/stable/c/d99ba93c35... WEB
https://git.kernel.org/stable/c/d99ba93c35ff2d5276e9c2632967481bd53a79d0
git.kernel.org/stable/c/f3d5e77b27... WEB
https://git.kernel.org/stable/c/f3d5e77b27fded71dcb97f409262bf0abba0410e

Frequently Asked Questions

What is CVE-2026-64270?
CVE-2026-64270 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-2026-64270?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What is the CVSS score of CVE-2026-64270?
CVE-2026-64270 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-2026-64270?
CVE-2026-64270 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-2026-64270?
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-q4qw-j7hr-9445",
  "modified" : "2026-08-23T15:32:55Z",
  "published" : "2026-07-25T12:31:28Z",
  "aliases" : [ "CVE-2026-64270" ],
  "details" : "In the Linux kernel, the following vulnerability has been resolved:\n\nInput: mms114 - reject an oversized device packet size\n\nmms114_interrupt() reads a packet of touch data from the device into a\nfixed-size on-stack buffer\n\n\tstruct mms114_touch touch[MMS114_MAX_TOUCH];\n\nwhich holds MMS114_MAX_TOUCH (10) events of MMS114_EVENT_SIZE (8) bytes,\ni.e. 80 bytes. The length of the I2C read into it is taken verbatim from\nthe device:\n\n\tpacket_size = mms114_read_reg(data, MMS114_PACKET_SIZE);\n\tif (packet_size <= 0)\n\t\tgoto out;\n\t...\n\terror = __mms114_read_reg(data, MMS114_INFORMATION, packet_size,\n\t\t\t(u8 *)touch);\n\npacket_size is a single device register byte (0x0F) and the only check\nis the lower bound packet_size <= 0; it is never bounded against the\nsize of touch[]. A malfunctioning, malicious or counterfeit controller\n(or an attacker tampering with the I2C bus) can report a packet_size of\nup to 255, so __mms114_read_reg() writes up to 175 bytes past the end of\ntouch[] on the IRQ-thread stack: a stack out-of-bounds write that can\noverwrite the stack canary, saved registers and the return address.\n\nA well-formed device never reports more than the buffer holds, so reject\nan oversized packet and drop the report, consistent with the handler's\nother error paths, rather than reading past the buffer.",
  "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" : [ {
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    "url" : "https://git.kernel.org/stable/c/040843281eebfa110d08fd7fb083fe6cb55cea14"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/39b12daf1adb80f9595fdfe584961deb80860cbb"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/5d2ea15ba03bf17ed143ff1a0995a4206edc3fb6"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/66725039f7090afe14c31bd259e2059a68f04023"
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  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/b78150729762d47c14fe29a2582bdca5568e62b8"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/d99ba93c35ff2d5276e9c2632967481bd53a79d0"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/f3d5e77b27fded71dcb97f409262bf0abba0410e"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-787" ],
    "severity" : "HIGH",
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-07-25T10:17:07Z"
  }
}