CVE-2026-68420: Software Security Vulnerability Vulnerability

HIGH
Advisory Identifier: GHSA-hf2r-xm53-x39m
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CVSS 7.1
Published
Advisory Summary

CVE-2026-68420 is a HIGH (CVSS 7.1) security vulnerability vulnerability (General Security Weakness) affecting Software libraries in the Maven ecosystem. Remediation is available in the latest vendor maintenance releases.

CVE-2026-68420 at a Glance

CVE Identifier CVE-2026-68420
GHSA Identifier GHSA-hf2r-xm53-x39m
Severity HIGH
CVSS v3.1 Base Score 7.1
CWE Classification General Security Weakness
Affected Product Software
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 7.1

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:N/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 None (I:N)
Availability High (A:H)

How to Fix CVE-2026-68420

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-2026-68420, 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: xfrm: reject optional IPTFS templates in outbound policies syzbot reported a stack-out-of-bounds read in xfrm_state_find() which flows from xfrm_tmpl_resolve_one(). Commit 3d776e31c841 ("xfrm: Reject optional tunnel/BEET mode templates in outbound policies") disallowed optional tunnel and BEET in outbound policies to prevent this. Later when IPTFS added, it was not covered by that fix and can still trigger the out-of-bounds read; Extend the check to disallow optional IPTFS in outbound policies as well. IPTFS should be identical to tunnel mode. IN and FWD policies are not affected: xfrm_tmpl_resolve_one() is only reachable via the outbound path. Reproducer, before: ip link add dummy0 type dummy ip link set dummy0 up ip addr add 10.1.1.1/24 dev dummy0 ip xfrm policy add src 10.1.1.1/32 dst 10.1.1.2/32 dir out tmpl src fc00::dead:1 dst fc00::dead:2 proto esp reqid 1 mode iptfs level use tmpl src fc00::dead:1 dst fc00::dead:2 proto esp reqid 2 mode transport ping -W 1 -c 1 10.1.1.2 PING 10.1.1.2 (10.1.1.2) 56(84) bytes of data. [ 64.168420] ================================================================== [ 64.169977] BUG: KASAN: stack-out-of-bounds in __xfrm6_addr_hash+0x11e/0x170 [ 64.169977] Read of size 4 at addr ffff88800e1ffd20 by task ping/2844 [ 64.169977] CPU: 2 UID: 0 PID: 2844 Comm: ping Not tainted 7.1.0-rc7-00180-geb23b588430a #98 PREEMPT(full) [ 64.169977] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 64.169977] Call Trace: [ 64.169977] <TASK> [ 64.169977] dump_stack_lvl+0x47/0x70 [ 64.169977] ? __xfrm6_addr_hash+0x11e/0x170 [ 64.169977] print_report+0x152/0x4b0 [ 64.169977] ? ksys_mmap_pgoff+0x6d/0xa0 [ 64.169977] ? entry_SYSCALL_64_after_hwframe+0x76/0x7e [ 64.169977] ? rcu_read_unlock_sched+0xa/0x20 [ 64.169977] ? __virt_addr_valid+0x21b/0x230 [ 64.169977] ? __xfrm6_addr_hash+0x11e/0x170 [ 64.169977] kasan_report+0xa8/0xd0 [ 64.169977] ? __xfrm6_addr_hash+0x11e/0x170 [ 64.169977] __xfrm6_addr_hash+0x11e/0x170 [ 64.169977] __xfrm_dst_hash+0x24/0xc0 [ 64.169977] xfrm_state_find+0xa2d/0x2f90 [ 64.169977] ? __pfx_xfrm_state_find+0x10/0x10 [ 64.169977] ? __pfx_ftrace_graph_ret_addr+0x10/0x10 [ 64.169977] ? __pfx_ftrace_graph_ret_addr+0x10/0x10 [ 64.169977] xfrm_tmpl_resolve_one+0x210/0x570 [ 64.169977] ? __pfx_xfrm_tmpl_resolve_one+0x10/0x10 [ 64.169977] ? __pfx_stack_trace_consume_entry+0x10/0x10 [ 64.169977] ? kernel_text_address+0x5b/0x80 [ 64.169977] ? __kernel_text_address+0xe/0x30 [ 64.169977] ? unwind_get_return_address+0x5e/0x90 [ 64.169977] ? arch_stack_walk+0x8c/0xe0 [ 64.169977] xfrm_tmpl_resolve+0x130/0x200 [ 64.169977] ? __pfx_xfrm_tmpl_resolve+0x10/0x10 [ 64.169977] ? __pfx_xfrm_policy_inexact_lookup_rcu+0x10/0x10 [ 64.169977] ? __refcount_add_not_zero.constprop.0+0xb2/0x110 [ 64.169977] ? __pfx___refcount_add_not_zero.constprop.0+0x10/0x10 [ 64.169977] xfrm_resolve_and_create_bundle+0xd5/0x310 [ 64.169977] ? __pfx_xfrm_resolve_and_create_bundle+0x10/0x10 [ 64.169977] ? __pfx_xfrm_policy_lookup_bytype+0x10/0x10 [ 64.169977] ? __pfx_xfrm_policy_lookup_bytype+0x10/0x10 [ 64.169977] xfrm_lookup_with_ifid+0x3d8/0xb80 [ 64.169977] ? __pfx_xfrm_lookup_with_ifid+0x10/0x10 [ 64.169977] ? ip_route_output_key_hash+0xc6/0x110 [ 64.169977] ? kasan_save_track+0x10/0x30 [ 64.169977] xfrm_lookup_route+0x18/0xe0 [ 64.169977] ip4_datagram_release_cb+0x4c9/0x530 [ 64.169977] ? __pfx_ip4_datagram_release_cb+0x10/0x10 [ 64.169977] ? do_raw_spin_lock+0x71/0xc0 [ 64.169977] ? __pfx_do_raw_spin_lock+0x10/0x10 [ 64.169977] release_sock+0xb0/0x170 [ 64.169977] udp_connect+0x43/0x50 [ 64.169977] __sys_connect+0xa6/0x100 [ 64.169977] ? alloc_fd+0x2e9/0x300 [ 64.169977] ? __pfx___sys_connect+0x10/0x10 [ 64.169977] ? preempt_latency ---truncated---

References

NVD — CVE-2026-68420 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-68420
git.kernel.org/stable/c/9333f4b6f4... WEB
https://git.kernel.org/stable/c/9333f4b6f44858fc98eb12bf26b8d2959eb975d5
git.kernel.org/stable/c/d7fc6f351c... WEB
https://git.kernel.org/stable/c/d7fc6f351c478586980a521d63b0214d9c055e78
git.kernel.org/stable/c/ea528f1823... WEB
https://git.kernel.org/stable/c/ea528f18231ec0f33317be57f8866913b19aba6e

Frequently Asked Questions

What is CVE-2026-68420?
CVE-2026-68420 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-2026-68420?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What is the CVSS score of CVE-2026-68420?
CVE-2026-68420 has a CVSS v3.1 base score of 7.1 (HIGH) with vector string CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H.
What CWE is associated with CVE-2026-68420?
CVE-2026-68420 is classified under General Security Weakness.
How can I check Maven dependencies for CVE-2026-68420?
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-hf2r-xm53-x39m",
  "modified" : "2026-08-14T00:31:58Z",
  "published" : "2026-08-10T15:33:50Z",
  "aliases" : [ "CVE-2026-68420" ],
  "details" : "In the Linux kernel, the following vulnerability has been resolved:\n\nxfrm: reject optional IPTFS templates in outbound policies\n\nsyzbot reported a stack-out-of-bounds read in xfrm_state_find()\nwhich flows from xfrm_tmpl_resolve_one().\n\nCommit 3d776e31c841 (\"xfrm: Reject optional tunnel/BEET mode\ntemplates in outbound policies\") disallowed optional tunnel and\nBEET in outbound policies to prevent this. Later when IPTFS\nadded, it was not covered by that fix and can still trigger\nthe out-of-bounds read;\n\nExtend the check to disallow optional IPTFS in outbound policies\nas well. IPTFS should be identical to tunnel mode.\nIN and FWD policies are not affected: xfrm_tmpl_resolve_one()\nis only reachable via the outbound path.\n\nReproducer, before:\n\nip link add dummy0 type dummy\nip link set dummy0 up\nip addr add 10.1.1.1/24 dev dummy0\nip xfrm policy add src 10.1.1.1/32 dst 10.1.1.2/32 dir out tmpl\n  src fc00::dead:1 dst fc00::dead:2 proto esp reqid 1 mode iptfs\n  level use tmpl src fc00::dead:1 dst fc00::dead:2 proto esp reqid\n  2 mode transport\nping -W 1 -c 1 10.1.1.2\nPING 10.1.1.2 (10.1.1.2) 56(84) bytes of data.\n\n[   64.168420] ==================================================================\n[   64.169977] BUG: KASAN: stack-out-of-bounds in __xfrm6_addr_hash+0x11e/0x170\n[   64.169977] Read of size 4 at addr ffff88800e1ffd20 by task ping/2844\n\n[   64.169977] CPU: 2 UID: 0 PID: 2844 Comm: ping Not tainted 7.1.0-rc7-00180-geb23b588430a #98 PREEMPT(full)\n[   64.169977] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.3-debian-1.16.3-2 04/01/2014\n[   64.169977] Call Trace:\n[   64.169977]  <TASK>\n[   64.169977]  dump_stack_lvl+0x47/0x70\n[   64.169977]  ? __xfrm6_addr_hash+0x11e/0x170\n[   64.169977]  print_report+0x152/0x4b0\n[   64.169977]  ? ksys_mmap_pgoff+0x6d/0xa0\n[   64.169977]  ? entry_SYSCALL_64_after_hwframe+0x76/0x7e\n[   64.169977]  ? rcu_read_unlock_sched+0xa/0x20\n[   64.169977]  ? __virt_addr_valid+0x21b/0x230\n[   64.169977]  ? __xfrm6_addr_hash+0x11e/0x170\n[   64.169977]  kasan_report+0xa8/0xd0\n[   64.169977]  ? __xfrm6_addr_hash+0x11e/0x170\n[   64.169977]  __xfrm6_addr_hash+0x11e/0x170\n[   64.169977]  __xfrm_dst_hash+0x24/0xc0\n[   64.169977]  xfrm_state_find+0xa2d/0x2f90\n[   64.169977]  ? __pfx_xfrm_state_find+0x10/0x10\n[   64.169977]  ? __pfx_ftrace_graph_ret_addr+0x10/0x10\n[   64.169977]  ? __pfx_ftrace_graph_ret_addr+0x10/0x10\n[   64.169977]  xfrm_tmpl_resolve_one+0x210/0x570\n[   64.169977]  ? __pfx_xfrm_tmpl_resolve_one+0x10/0x10\n[   64.169977]  ? __pfx_stack_trace_consume_entry+0x10/0x10\n[   64.169977]  ? kernel_text_address+0x5b/0x80\n[   64.169977]  ? __kernel_text_address+0xe/0x30\n[   64.169977]  ? unwind_get_return_address+0x5e/0x90\n[   64.169977]  ? arch_stack_walk+0x8c/0xe0\n[   64.169977]  xfrm_tmpl_resolve+0x130/0x200\n[   64.169977]  ? __pfx_xfrm_tmpl_resolve+0x10/0x10\n[   64.169977]  ? __pfx_xfrm_policy_inexact_lookup_rcu+0x10/0x10\n[   64.169977]  ? __refcount_add_not_zero.constprop.0+0xb2/0x110\n[   64.169977]  ? __pfx___refcount_add_not_zero.constprop.0+0x10/0x10\n[   64.169977]  xfrm_resolve_and_create_bundle+0xd5/0x310\n[   64.169977]  ? __pfx_xfrm_resolve_and_create_bundle+0x10/0x10\n[   64.169977]  ? __pfx_xfrm_policy_lookup_bytype+0x10/0x10\n[   64.169977]  ? __pfx_xfrm_policy_lookup_bytype+0x10/0x10\n[   64.169977]  xfrm_lookup_with_ifid+0x3d8/0xb80\n[   64.169977]  ? __pfx_xfrm_lookup_with_ifid+0x10/0x10\n[   64.169977]  ? ip_route_output_key_hash+0xc6/0x110\n[   64.169977]  ? kasan_save_track+0x10/0x30\n[   64.169977]  xfrm_lookup_route+0x18/0xe0\n[   64.169977]  ip4_datagram_release_cb+0x4c9/0x530\n[   64.169977]  ? __pfx_ip4_datagram_release_cb+0x10/0x10\n[   64.169977]  ? do_raw_spin_lock+0x71/0xc0\n[   64.169977]  ? __pfx_do_raw_spin_lock+0x10/0x10\n[   64.169977]  release_sock+0xb0/0x170\n[   64.169977]  udp_connect+0x43/0x50\n[   64.169977]  __sys_connect+0xa6/0x100\n[   64.169977]  ? alloc_fd+0x2e9/0x300\n[   64.169977]  ? __pfx___sys_connect+0x10/0x10\n[   64.169977]  ? preempt_latency\n---truncated---",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H"
  } ],
  "affected" : [ ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-68420"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/9333f4b6f44858fc98eb12bf26b8d2959eb975d5"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/d7fc6f351c478586980a521d63b0214d9c055e78"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/ea528f18231ec0f33317be57f8866913b19aba6e"
  } ],
  "database_specific" : {
    "cwe_ids" : [ ],
    "severity" : "HIGH",
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-08-10T13:20:35Z"
  }
}