CVE-2026-80536: Software Security Vulnerability Vulnerability

HIGH
Advisory Identifier: GHSA-qwxm-39mx-rx8g
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CVSS 8.4
Published
Advisory Summary

CVE-2026-80536 is a HIGH (CVSS 8.4) security vulnerability vulnerability (General Security Weakness) affecting Software libraries in the Maven ecosystem. Remediation is available in the latest vendor maintenance releases.

CVE-2026-80536 at a Glance

CVE Identifier CVE-2026-80536
GHSA Identifier GHSA-qwxm-39mx-rx8g
Severity HIGH
CVSS v3.1 Base Score 8.4
CWE Classification General Security Weakness
Affected Product Software
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 8.4

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

Attack Vector Local (AV:L)
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-2026-80536

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-2026-80536, 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: xfs: bounds-check buffer log item's dirty bitmap xlog_recover_do_reg_buffer() replays each dirty region described by a buffer log item's bitmap into the buffer read for that item: memcpy(xfs_buf_offset(bp, (uint)bit << XFS_BLF_SHIFT), item->ri_buf[i].iov_base, nbits << XFS_BLF_SHIFT); The destination offset (bit/nbits, from the logged dirty bitmap) and the buffer size (from the logged blf_len) are both attacker-controlled and otherwise unrelated, yet the only thing bounding the copy is an ASSERT(), which compiles away on production kernels. A crafted image logging a small blf_len together with a bitmap bit past the end of that buffer drives the memcpy() past the buffer's allocation, corrupting adjacent kernel heap during mount-time log recovery. This is reachable by anyone who can get a crafted image mounted -- the malicious-filesystem threat model XFS already guards against elsewhere. Turn the ASSERT() into a real XFS_IS_CORRUPT() check that aborts recovery of the buffer with -EFSCORRUPTED, consistent with the validate-and-fail idiom already used in xlog_recover_do_inode_buffer() and xfs_dquot_item_recover.c. xlog_recover_do_reg_buffer() therefore becomes STATIC int and its three callers propagate the error. Found and confirmed with KASAN on a CONFIG_XFS_DEBUG=n build: the crafted image trips a slab-out-of-bounds write before this change and fails recovery cleanly with -EFSCORRUPTED after it.

References

NVD — CVE-2026-80536 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-80536
git.kernel.org/stable/c/7e32d4eeba... WEB
https://git.kernel.org/stable/c/7e32d4eebae6ca24f8a673c107fd7eca1f47afc2
git.kernel.org/stable/c/813f8136a2... WEB
https://git.kernel.org/stable/c/813f8136a2ce1fee266d02a7df73db6e8a541604
git.kernel.org/stable/c/acb4e26295... WEB
https://git.kernel.org/stable/c/acb4e26295e7f0e685815a3fd3d70bd8329cefa1
git.kernel.org/stable/c/b7528b4281... WEB
https://git.kernel.org/stable/c/b7528b42813f02724a78fce1da24d69d1bfc4d38
git.kernel.org/stable/c/edaf5b6bd6... WEB
https://git.kernel.org/stable/c/edaf5b6bd625356893da20d69a259b34a9de2694
git.kernel.org/stable/c/f3859c35a4... WEB
https://git.kernel.org/stable/c/f3859c35a4fbc1c1c58431f684f808e43696891d
git.kernel.org/stable/c/f7b5fa83e2... WEB
https://git.kernel.org/stable/c/f7b5fa83e2c192be922121b764415fa8c7549ea1
git.kernel.org/stable/c/f828821445... WEB
https://git.kernel.org/stable/c/f8288214459ead7e87d26e5822f62c14a4f2ed6b

Frequently Asked Questions

What is CVE-2026-80536?
CVE-2026-80536 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-2026-80536?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What is the CVSS score of CVE-2026-80536?
CVE-2026-80536 has a CVSS v3.1 base score of 8.4 (HIGH) with vector string CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
What CWE is associated with CVE-2026-80536?
CVE-2026-80536 is classified under General Security Weakness.
How can I check Maven dependencies for CVE-2026-80536?
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-qwxm-39mx-rx8g",
  "modified" : "2026-08-27T15:31:32Z",
  "published" : "2026-08-27T06:31:31Z",
  "aliases" : [ "CVE-2026-80536" ],
  "details" : "In the Linux kernel, the following vulnerability has been resolved:\n\nxfs: bounds-check buffer log item's dirty bitmap\n\nxlog_recover_do_reg_buffer() replays each dirty region described by a\nbuffer log item's bitmap into the buffer read for that item:\n\n\tmemcpy(xfs_buf_offset(bp, (uint)bit << XFS_BLF_SHIFT),\n\t\titem->ri_buf[i].iov_base,\n\t\tnbits << XFS_BLF_SHIFT);\n\nThe destination offset (bit/nbits, from the logged dirty bitmap) and the\nbuffer size (from the logged blf_len) are both attacker-controlled and\notherwise unrelated, yet the only thing bounding the copy is an ASSERT(),\nwhich compiles away on production kernels. A crafted image logging a\nsmall blf_len together with a bitmap bit past the end of that buffer\ndrives the memcpy() past the buffer's allocation, corrupting adjacent\nkernel heap during mount-time log recovery. This is reachable by anyone\nwho can get a crafted image mounted -- the malicious-filesystem threat\nmodel XFS already guards against elsewhere.\n\nTurn the ASSERT() into a real XFS_IS_CORRUPT() check that aborts recovery\nof the buffer with -EFSCORRUPTED, consistent with the validate-and-fail\nidiom already used in xlog_recover_do_inode_buffer() and\nxfs_dquot_item_recover.c. xlog_recover_do_reg_buffer() therefore becomes\nSTATIC int and its three callers propagate the error.\n\nFound and confirmed with KASAN on a CONFIG_XFS_DEBUG=n build: the crafted\nimage trips a slab-out-of-bounds write before this change and fails\nrecovery cleanly with -EFSCORRUPTED after it.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:L/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-2026-80536"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/7e32d4eebae6ca24f8a673c107fd7eca1f47afc2"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/813f8136a2ce1fee266d02a7df73db6e8a541604"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/acb4e26295e7f0e685815a3fd3d70bd8329cefa1"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/b7528b42813f02724a78fce1da24d69d1bfc4d38"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/edaf5b6bd625356893da20d69a259b34a9de2694"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/f3859c35a4fbc1c1c58431f684f808e43696891d"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/f7b5fa83e2c192be922121b764415fa8c7549ea1"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/f8288214459ead7e87d26e5822f62c14a4f2ed6b"
  } ],
  "database_specific" : {
    "cwe_ids" : [ ],
    "severity" : "HIGH",
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-08-26T15:17:07Z"
  }
}