CVE-2026-64438: Software Security Vulnerability Vulnerability
HIGHCVE-2026-64438 is a HIGH (CVSS 8.8) security vulnerability vulnerability (CWE-416: Use After Free) affecting Software libraries in the Maven ecosystem. The weakness occurs when the product reuses or references memory after it has been freed. at some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.. Remediation is available in the latest vendor maintenance releases.
CVE-2026-64438 at a Glance
Security Impact
CVSS: 8.8
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:C/C:H/I:H/A:H).
How to Fix CVE-2026-64438
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.
Run the following command in your project directory to verify that all resolved dependencies use the patched release:
mvn dependency:treeHow to Check if You Are Affected
To determine whether your Java application is affected by CVE-2026-64438, inspect your build dependencies using the Maven Dependency Plugin:
mvn dependency:treeAnalyze 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-416: Use After Free, where the product reuses or references memory after it has been freed. at some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer. 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
References
Frequently Asked Questions
What is CVE-2026-64438?
Which Software versions are affected?
What version fixes CVE-2026-64438?
What is the CVSS score of CVE-2026-64438?
What CWE is associated with CVE-2026-64438?
How can I check Maven dependencies for CVE-2026-64438?
Machine-readable OSV JSON
OSV v1.5 Schema
{
"schema_version" : "1.4.0",
"id" : "GHSA-j99q-5p83-43j8",
"modified" : "2026-07-27T06:30:37Z",
"published" : "2026-07-25T12:31:35Z",
"aliases" : [ "CVE-2026-64438" ],
"details" : "In the Linux kernel, the following vulnerability has been resolved:\n\ncrypto: qat - fix VF2PF work teardown race in adf_disable_sriov()\n\nThe VF2PF interrupt handler queues PF-side response work that stores a\nraw pointer to per-VF state (struct adf_accel_vf_info). Currently,\nadf_disable_sriov() destroys per-VF mutexes and frees vf_info without\nstopping new VF2PF work or waiting for in-flight workers to complete. A\nconcurrently scheduled or already queued worker can then dereference\nfreed memory.\n\nThis manifests as a use-after-free when KASAN is enabled:\n\n BUG: KASAN: null-ptr-deref in mutex_lock+0x76/0xe0\n Write of size 8 at addr 0000000000000260 by task kworker/24:2/...\n Workqueue: qat_pf2vf_resp_wq adf_iov_send_resp [intel_qat]\n Call Trace:\n kasan_report+0x119/0x140\n mutex_lock+0x76/0xe0\n adf_gen4_pfvf_send+0xd4/0x1f0 [intel_qat]\n adf_recv_and_handle_vf2pf_msg+0x290/0x360 [intel_qat]\n adf_iov_send_resp+0x8c/0xe0 [intel_qat]\n process_one_work+0x6ac/0xfd0\n worker_thread+0x4dd/0xd30\n kthread+0x326/0x410\n ret_from_fork+0x33b/0x670\n\nAdd a PF-local flag, vf2pf_disabled, that gates work queueing, worker\nprocessing, and interrupt re-enabling during teardown. Set this flag\natomically with the hardware interrupt mask inside\nadf_disable_all_vf2pf_interrupts(). After masking, synchronize the AE\ncluster MSI-X interrupt and flush the PF response workqueue before\ntearing down per-VF locks and state so all in-flight work completes\nbefore vf_info is destroyed.\n\nIntroduce adf_enable_all_vf2pf_interrupts() to clear the flag and\nunmask all VF2PF interrupts under the same lock when SR-IOV is\nre-enabled. This ensures the software flag and hardware state transition\natomically on both the enable and disable paths.",
"severity" : [ {
"type" : "CVSS_V3",
"score" : "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H"
} ],
"affected" : [ ],
"references" : [ {
"type" : "ADVISORY",
"url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-64438"
}, {
"type" : "WEB",
"url" : "https://git.kernel.org/stable/c/218c2836b3987f3fa1d9eac505462cded0821e4c"
}, {
"type" : "WEB",
"url" : "https://git.kernel.org/stable/c/277281c10c63791067d24d421f7c43a15faa9096"
}, {
"type" : "WEB",
"url" : "https://git.kernel.org/stable/c/446b4d77599cf1a168573f7fb32a4a6aa4f09219"
}, {
"type" : "WEB",
"url" : "https://git.kernel.org/stable/c/49cd5ac6de8de39a14ead609bb552d372d5602cd"
}, {
"type" : "WEB",
"url" : "https://git.kernel.org/stable/c/51144032248cc4ea22917370565650670b8b4e9b"
}, {
"type" : "WEB",
"url" : "https://git.kernel.org/stable/c/5d916c1eae1933511a69bffe243b4ee5d7da399c"
}, {
"type" : "WEB",
"url" : "https://git.kernel.org/stable/c/6e92b28cd74fa433658efeadf21b9d4b01023d7d"
}, {
"type" : "WEB",
"url" : "https://git.kernel.org/stable/c/f344a369d0380d54c8d6c8d24734a78dd5a89817"
} ],
"database_specific" : {
"cwe_ids" : [ "CWE-416" ],
"severity" : "HIGH",
"github_reviewed" : false,
"github_reviewed_at" : null,
"nvd_published_at" : "2026-07-25T10:17:28Z"
}
}