CVE-2026-98065: Software Security Vulnerability Vulnerability

UNKNOWN
Advisory Identifier: GHSA-mhp6-ww8c-xw4f
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Advisory Summary

CVE-2026-98065 is a security vulnerability vulnerability (General Security Weakness) affecting Software libraries in the Maven ecosystem. Remediation is available in the latest vendor maintenance releases.

CVE-2026-98065 at a Glance

CVE Identifier CVE-2026-98065
GHSA Identifier GHSA-mhp6-ww8c-xw4f
Severity N/A
CVSS v3.1 Base Score N/A
CWE Classification General Security Weakness
Affected Product Software
Package Ecosystem Maven
Published Date
Last Updated

How to Fix CVE-2026-98065

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-2026-98065, 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: bpf: Reject key-less BTF for hash maps map_check_btf() allows a key-less BTF (btf_key_type_id == 0) only for maps that have a ->map_check_btf callback, and leaves the actual decision to that callback. Hash maps used to have no ->map_check_btf, so a key-less BTF was rejected outright. That changed when htab and rhtab gained a ->map_check_btf to register a dtor - htab in commit 1df97a7453ee ("bpf: Register dtor for freeing special fields") and rhtab in commit 6905f8601298 ("bpf: Allow special fields in resizable hashtab"). Neither looks at the key, so a key-less hash map now passes map_check_btf() and gets created. Reading it back through bpffs feeds the key type_id 0 into btf_type_seq_show(); btf_type_by_id() returns the void type, kind_ops[BTF_KIND_UNKN] is NULL, and btf_type_show() dereferences it: RIP: 0010:btf_type_show+0x223/0x2e0 kernel/bpf/btf.c:8232 RSP: 0018:ffffc9000399f868 EFLAGS: 00010206 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 0000000000000005 RSI: 0000000000000000 RDI: 0000000000000028 RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000 R10: ffffc9000399f970 R11: 0000000000000001 R12: ffffffff9b96b140 R13: ffffc9000399f8e0 R14: ffff88803d393c00 R15: 0000000000000003 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000200000000000 CR3: 000000003d213000 CR4: 0000000000352ef0 DR0: 0000000039ae8f55 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 Call Trace: <TASK> btf_type_seq_show_flags+0xca/0x120 kernel/bpf/btf.c:8250 htab_map_seq_show_elem+0x12e/0x350 kernel/bpf/hashtab.c:1669 map_seq_show+0x13d/0x1e0 kernel/bpf/inode.c:293 traverse.part.0.constprop.0+0x107/0x650 fs/seq_file.c:112 traverse fs/seq_file.c:99 [inline] seq_read_iter+0x93f/0x1270 fs/seq_file.c:196 seq_read+0x344/0x4d0 fs/seq_file.c:163 vfs_read+0x1e4/0xb40 fs/read_write.c:572 ksys_pread64 fs/read_write.c:764 [inline] __do_sys_pread64 fs/read_write.c:772 [inline] __se_sys_pread64 fs/read_write.c:769 [inline] __x64_sys_pread64+0x1eb/0x250 fs/read_write.c:769 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline] do_syscall_64+0x123/0x790 arch/x86/entry/syscall_64.c:84 entry_SYSCALL_64_after_hwframe+0x77/0x7f Reject a key-less BTF in htab_map_check_btf() and rhtab_map_check_btf(), restoring the previous behavior.

References

NVD — CVE-2026-98065 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-98065
git.kernel.org/stable/c/0895a0c073... WEB
https://git.kernel.org/stable/c/0895a0c0734703be5532f3883c42db95615fd98b
git.kernel.org/stable/c/54098e3fe3... WEB
https://git.kernel.org/stable/c/54098e3fe34ec190bc256b338b9a93c7e2dc9354
git.kernel.org/stable/c/7ca2312528... WEB
https://git.kernel.org/stable/c/7ca231252820c47aaec42a5db580db98f9b64724
git.kernel.org/stable/c/fa047f2a02... WEB
https://git.kernel.org/stable/c/fa047f2a025003f5654ebd76539f16a6ead0401a

Frequently Asked Questions

What is CVE-2026-98065?
CVE-2026-98065 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-2026-98065?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What CWE is associated with CVE-2026-98065?
CVE-2026-98065 is classified under General Security Weakness.
How can I check Maven dependencies for CVE-2026-98065?
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-mhp6-ww8c-xw4f",
  "modified" : "2026-10-03T12:31:25Z",
  "published" : "2026-09-25T12:31:35Z",
  "aliases" : [ "CVE-2026-98065" ],
  "details" : "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Reject key-less BTF for hash maps\n\nmap_check_btf() allows a key-less BTF (btf_key_type_id == 0) only for\nmaps that have a ->map_check_btf callback, and leaves the actual\ndecision to that callback. Hash maps used to have no ->map_check_btf,\nso a key-less BTF was rejected outright.\n\nThat changed when htab and rhtab gained a ->map_check_btf to register a\ndtor - htab in commit 1df97a7453ee (\"bpf: Register dtor for freeing\nspecial fields\") and rhtab in commit 6905f8601298 (\"bpf: Allow special\nfields in resizable hashtab\"). Neither looks at the key, so a key-less\nhash map now passes map_check_btf() and gets created. Reading it back\nthrough bpffs feeds the key type_id 0 into btf_type_seq_show();\nbtf_type_by_id() returns the void type, kind_ops[BTF_KIND_UNKN] is NULL,\nand btf_type_show() dereferences it:\n\nRIP: 0010:btf_type_show+0x223/0x2e0 kernel/bpf/btf.c:8232\nRSP: 0018:ffffc9000399f868 EFLAGS: 00010206\nRAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000\nRDX: 0000000000000005 RSI: 0000000000000000 RDI: 0000000000000028\nRBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000\nR10: ffffc9000399f970 R11: 0000000000000001 R12: ffffffff9b96b140\nR13: ffffc9000399f8e0 R14: ffff88803d393c00 R15: 0000000000000003\nCS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nCR2: 0000200000000000 CR3: 000000003d213000 CR4: 0000000000352ef0\nDR0: 0000000039ae8f55 DR1: 0000000000000000 DR2: 0000000000000000\nDR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400\nCall Trace:\n <TASK>\n btf_type_seq_show_flags+0xca/0x120 kernel/bpf/btf.c:8250\n htab_map_seq_show_elem+0x12e/0x350 kernel/bpf/hashtab.c:1669\n map_seq_show+0x13d/0x1e0 kernel/bpf/inode.c:293\n traverse.part.0.constprop.0+0x107/0x650 fs/seq_file.c:112\n traverse fs/seq_file.c:99 [inline]\n seq_read_iter+0x93f/0x1270 fs/seq_file.c:196\n seq_read+0x344/0x4d0 fs/seq_file.c:163\n vfs_read+0x1e4/0xb40 fs/read_write.c:572\n ksys_pread64 fs/read_write.c:764 [inline]\n __do_sys_pread64 fs/read_write.c:772 [inline]\n __se_sys_pread64 fs/read_write.c:769 [inline]\n __x64_sys_pread64+0x1eb/0x250 fs/read_write.c:769\n do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]\n do_syscall_64+0x123/0x790 arch/x86/entry/syscall_64.c:84\n entry_SYSCALL_64_after_hwframe+0x77/0x7f\n\nReject a key-less BTF in htab_map_check_btf() and rhtab_map_check_btf(),\nrestoring the previous behavior.",
  "severity" : [ ],
  "affected" : [ ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-98065"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/0895a0c0734703be5532f3883c42db95615fd98b"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/54098e3fe34ec190bc256b338b9a93c7e2dc9354"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/7ca231252820c47aaec42a5db580db98f9b64724"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/fa047f2a025003f5654ebd76539f16a6ead0401a"
  } ],
  "database_specific" : {
    "cwe_ids" : [ ],
    "severity" : null,
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-09-25T11:17:35Z"
  }
}