CVE-2026-52939: Software Security Vulnerability Vulnerability
MODERATECVE-2026-52939 is a MODERATE (CVSS 5.5) security vulnerability vulnerability (CWE-476: NULL Pointer Dereference) affecting Software libraries in the Maven ecosystem. The weakness occurs when the product dereferences a pointer that it expects to be valid but is null.. Remediation is available in the latest vendor maintenance releases.
CVE-2026-52939 at a Glance
Security Impact
CVSS: 5.5
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:N/I:N/A:H).
How to Fix CVE-2026-52939
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-2026-52939, 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-476: NULL Pointer Dereference, where the product dereferences a pointer that it expects to be valid but is null. 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-2026-52939?
Which Software versions are affected?
What version fixes CVE-2026-52939?
What is the CVSS score of CVE-2026-52939?
What CWE is associated with CVE-2026-52939?
How can I check Maven dependencies for CVE-2026-52939?
Machine-readable OSV JSON
OSV v1.5 Schema
{
"schema_version" : "1.4.0",
"id" : "GHSA-v4gx-744x-jr2m",
"modified" : "2026-07-08T21:30:22Z",
"published" : "2026-06-24T09:30:48Z",
"aliases" : [ "CVE-2026-52939" ],
"details" : "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/rds: fix NULL deref in rds_ib_send_cqe_handler() on masked atomic completion\n\nrds_ib_xmit_atomic() always programs a masked atomic opcode\n(IB_WR_MASKED_ATOMIC_CMP_AND_SWP or IB_WR_MASKED_ATOMIC_FETCH_AND_ADD)\nfor every RDS atomic cmsg. But the completion-side switch in\nrds_ib_send_unmap_op() only handles the non-masked opcodes, so a masked\natomic completion falls through to default and returns rm == NULL while\nsend->s_op is left set. rds_ib_send_cqe_handler() then dereferences the\nNULL rm via rm->m_final_op, oopsing in softirq context. An unprivileged\nAF_RDS sendmsg() of an atomic cmsg over an active RDS/IB connection\ntriggers it; on hardware that natively accepts masked atomics (mlx4,\nmlx5) no extra setup is needed.\n\n RDS/IB: rds_ib_send_unmap_op: unexpected opcode 0xd in WR!\n Oops: general protection fault [#1] SMP KASAN\n KASAN: null-ptr-deref in range [0x0000000000000190-0x0000000000000197]\n RIP: rds_ib_send_cqe_handler+0x25c/0xb10 (net/rds/ib_send.c:282)\n Call Trace:\n <IRQ>\n rds_ib_send_cqe_handler (net/rds/ib_send.c:282)\n poll_scq (net/rds/ib_cm.c:274)\n rds_ib_tasklet_fn_send (net/rds/ib_cm.c:294)\n tasklet_action_common (kernel/softirq.c:943)\n handle_softirqs (kernel/softirq.c:573)\n run_ksoftirqd (kernel/softirq.c:479)\n </IRQ>\n Kernel panic - not syncing: Fatal exception in interrupt\n\nHandle the masked atomic opcodes in the same case as the non-masked\nones: they map to the same struct rds_message.atomic union member, so\nthe existing container_of()/rds_ib_send_unmap_atomic() body is correct\nfor them.",
"severity" : [ {
"type" : "CVSS_V3",
"score" : "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"
} ],
"affected" : [ ],
"references" : [ {
"type" : "ADVISORY",
"url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-52939"
}, {
"type" : "WEB",
"url" : "https://git.kernel.org/stable/c/0f22412a2f4fbbe0251c132abee045d15a90e5b6"
}, {
"type" : "WEB",
"url" : "https://git.kernel.org/stable/c/0f7baa82a24813cdad0b06a6f8f07e4824af5ed5"
}, {
"type" : "WEB",
"url" : "https://git.kernel.org/stable/c/34080db3e70ddf94c38512ad2331e3c3afca6cc1"
}, {
"type" : "WEB",
"url" : "https://git.kernel.org/stable/c/4dd262f875e87653df50b138de1390ab0628e6b7"
}, {
"type" : "WEB",
"url" : "https://git.kernel.org/stable/c/4fd34669558085bcb589aa2078a13b0ca79e360d"
}, {
"type" : "WEB",
"url" : "https://git.kernel.org/stable/c/6e4615164d185a26badb2f376a2449f4d174a5f0"
}, {
"type" : "WEB",
"url" : "https://git.kernel.org/stable/c/a0148342badd8c9b2e46551766a27cb76c82e715"
}, {
"type" : "WEB",
"url" : "https://git.kernel.org/stable/c/dcf458120add64c96a6ef5cf719340453f6e6abf"
} ],
"database_specific" : {
"cwe_ids" : [ "CWE-476" ],
"severity" : "MODERATE",
"github_reviewed" : false,
"github_reviewed_at" : null,
"nvd_published_at" : "2026-06-24T08:16:24Z"
}
}