CVE-2026-46279: Software Security Vulnerability Vulnerability

HIGH
Advisory Identifier: GHSA-q7fc-6xm7-37m9
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CVSS 7.8
CWE-415
Published
Advisory Summary

CVE-2026-46279 is a HIGH (CVSS 7.8) security vulnerability vulnerability (CWE-415: Double Free) affecting Software libraries in the Maven ecosystem. The weakness occurs when the product calls free() twice on the same memory address.. Remediation is available in the latest vendor maintenance releases.

CVE-2026-46279 at a Glance

CVE Identifier CVE-2026-46279
GHSA Identifier GHSA-q7fc-6xm7-37m9
Severity HIGH
CVSS v3.1 Base Score 7.8
CWE Classification CWE-415: Double Free
Affected Product Software
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 7.8

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:U/C:H/I:H/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 High (I:H)
Availability High (A:H)

How to Fix CVE-2026-46279

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-2026-46279, 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 CWE-415: Double Free, where the product calls free() twice on the same memory address. 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: mm/alloc_tag: clear codetag for pages allocated before page_ext initialization Due to initialization ordering, page_ext is allocated and initialized relatively late during boot. Some pages have already been allocated and freed before page_ext becomes available, leaving their codetag uninitialized. A clear example is in init_section_page_ext(): alloc_page_ext() calls kmemleak_alloc(). If the slab cache has no free objects, it falls back to the buddy allocator to allocate memory. However, at this point page_ext is not yet fully initialized, so these newly allocated pages have no codetag set. These pages may later be reclaimed by KASAN, which causes the warning to trigger when they are freed because their codetag ref is still empty. Use a global array to track pages allocated before page_ext is fully initialized. The array size is fixed at 8192 entries, and will emit a warning if this limit is exceeded. When page_ext initialization completes, set their codetag to empty to avoid warnings when they are freed later. This warning is only observed with CONFIG_MEM_ALLOC_PROFILING_DEBUG=Y and mem_profiling_compressed disabled: [ 9.582133] ------------[ cut here ]------------ [ 9.582137] alloc_tag was not set [ 9.582139] WARNING: ./include/linux/alloc_tag.h:164 at __pgalloc_tag_sub+0x40f/0x550, CPU#5: systemd/1 [ 9.582190] CPU: 5 UID: 0 PID: 1 Comm: systemd Not tainted 7.0.0-rc4 #1 PREEMPT(lazy) [ 9.582192] Hardware name: Red Hat KVM, BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 9.582194] RIP: 0010:__pgalloc_tag_sub+0x40f/0x550 [ 9.582196] Code: 00 00 4c 29 e5 48 8b 05 1f 88 56 05 48 8d 4c ad 00 48 8d 2c c8 e9 87 fd ff ff 0f 0b 0f 0b e9 f3 fe ff ff 48 8d 3d 61 2f ed 03 <67> 48 0f b9 3a e9 b3 fd ff ff 0f 0b eb e4 e8 5e cd 14 02 4c 89 c7 [ 9.582197] RSP: 0018:ffffc9000001f940 EFLAGS: 00010246 [ 9.582200] RAX: dffffc0000000000 RBX: 1ffff92000003f2b RCX: 1ffff110200d806c [ 9.582201] RDX: ffff8881006c0360 RSI: 0000000000000004 RDI: ffffffff9bc7b460 [ 9.582202] RBP: 0000000000000000 R08: 0000000000000000 R09: fffffbfff3a62324 [ 9.582203] R10: ffffffff9d311923 R11: 0000000000000000 R12: ffffea0004001b00 [ 9.582204] R13: 0000000000002000 R14: ffffea0000000000 R15: ffff8881006c0360 [ 9.582206] FS: 00007ffbbcf2d940(0000) GS:ffff888450479000(0000) knlGS:0000000000000000 [ 9.582208] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 9.582210] CR2: 000055ee3aa260d0 CR3: 0000000148b67005 CR4: 0000000000770ef0 [ 9.582211] PKRU: 55555554 [ 9.582212] Call Trace: [ 9.582213] <TASK> [ 9.582214] ? __pfx___pgalloc_tag_sub+0x10/0x10 [ 9.582216] ? check_bytes_and_report+0x68/0x140 [ 9.582219] __free_frozen_pages+0x2e4/0x1150 [ 9.582221] ? __free_slab+0xc2/0x2b0 [ 9.582224] qlist_free_all+0x4c/0xf0 [ 9.582227] kasan_quarantine_reduce+0x15d/0x180 [ 9.582229] __kasan_slab_alloc+0x69/0x90 [ 9.582232] kmem_cache_alloc_noprof+0x14a/0x500 [ 9.582234] do_getname+0x96/0x310 [ 9.582237] do_readlinkat+0x91/0x2f0 [ 9.582239] ? __pfx_do_readlinkat+0x10/0x10 [ 9.582240] ? get_random_bytes_user+0x1df/0x2c0 [ 9.582244] __x64_sys_readlinkat+0x96/0x100 [ 9.582246] do_syscall_64+0xce/0x650 [ 9.582250] ? __x64_sys_getrandom+0x13a/0x1e0 [ 9.582252] ? __pfx___x64_sys_getrandom+0x10/0x10 [ 9.582254] ? do_syscall_64+0x114/0x650 [ 9.582255] ? ksys_read+0xfc/0x1d0 [ 9.582258] ? __pfx_ksys_read+0x10/0x10 [ 9.582260] ? do_syscall_64+0x114/0x650 [ 9.582262] ? do_syscall_64+0x114/0x650 [ 9.582264] ? __pfx_fput_close_sync+0x10/0x10 [ 9.582266] ? file_close_fd_locked+0x178/0x2a0 [ 9.582268] ? __x64_sys_faccessat2+0x96/0x100 [ 9.582269] ? __x64_sys_close+0x7d/0xd0 [ 9.582271] ? do_syscall_64+0x114/0x650 [ 9.582273] ? do_syscall_64+0x114/0x650 [ 9.582275] ? clear_bhb_loop+0x50/0xa0 [ 9.582277] ? clear_bhb_l ---truncated---

References

NVD — CVE-2026-46279 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-46279
git.kernel.org/stable/c/6b1842775a... WEB
https://git.kernel.org/stable/c/6b1842775a460245e97d36d3a67d0cfba7c4ff79
git.kernel.org/stable/c/b49dfabc38... WEB
https://git.kernel.org/stable/c/b49dfabc38cad5e50af24f63edd124a10de3ebb6
git.kernel.org/stable/c/d5b495ba9d... WEB
https://git.kernel.org/stable/c/d5b495ba9de0423ef39f8bd86729a885870c7efe

Frequently Asked Questions

What is CVE-2026-46279?
CVE-2026-46279 is a security vulnerability in Software classified as a security vulnerability vulnerability under CWE-415: Double Free.
Which Software versions are affected?
Affected versions include releases prior to current release patches.
What version fixes CVE-2026-46279?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What is the CVSS score of CVE-2026-46279?
CVE-2026-46279 has a CVSS v3.1 base score of 7.8 (HIGH) with vector string CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
What CWE is associated with CVE-2026-46279?
CVE-2026-46279 is classified under CWE-415: Double Free (The product calls free() twice on the same memory address.).
How can I check Maven dependencies for CVE-2026-46279?
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-q7fc-6xm7-37m9",
  "modified" : "2026-07-08T15:31:35Z",
  "published" : "2026-06-08T18:31:51Z",
  "aliases" : [ "CVE-2026-46279" ],
  "details" : "In the Linux kernel, the following vulnerability has been resolved:\n\nmm/alloc_tag: clear codetag for pages allocated before page_ext initialization\n\nDue to initialization ordering, page_ext is allocated and initialized\nrelatively late during boot.  Some pages have already been allocated and\nfreed before page_ext becomes available, leaving their codetag\nuninitialized.\n\nA clear example is in init_section_page_ext(): alloc_page_ext() calls\nkmemleak_alloc().  If the slab cache has no free objects, it falls back to\nthe buddy allocator to allocate memory.  However, at this point page_ext\nis not yet fully initialized, so these newly allocated pages have no\ncodetag set.  These pages may later be reclaimed by KASAN, which causes\nthe warning to trigger when they are freed because their codetag ref is\nstill empty.\n\nUse a global array to track pages allocated before page_ext is fully\ninitialized.  The array size is fixed at 8192 entries, and will emit a\nwarning if this limit is exceeded.  When page_ext initialization\ncompletes, set their codetag to empty to avoid warnings when they are\nfreed later.\n\nThis warning is only observed with CONFIG_MEM_ALLOC_PROFILING_DEBUG=Y and\nmem_profiling_compressed disabled:\n\n[    9.582133] ------------[ cut here ]------------\n[    9.582137] alloc_tag was not set\n[    9.582139] WARNING: ./include/linux/alloc_tag.h:164 at __pgalloc_tag_sub+0x40f/0x550, CPU#5: systemd/1\n[    9.582190] CPU: 5 UID: 0 PID: 1 Comm: systemd Not tainted 7.0.0-rc4 #1 PREEMPT(lazy)\n[    9.582192] Hardware name: Red Hat KVM, BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014\n[    9.582194] RIP: 0010:__pgalloc_tag_sub+0x40f/0x550\n[    9.582196] Code: 00 00 4c 29 e5 48 8b 05 1f 88 56 05 48 8d 4c ad 00 48 8d 2c c8 e9 87 fd ff ff 0f 0b 0f 0b e9 f3 fe ff ff 48 8d 3d 61 2f ed 03 <67> 48 0f b9 3a e9 b3 fd ff ff 0f 0b eb e4 e8 5e cd 14 02 4c 89 c7\n[    9.582197] RSP: 0018:ffffc9000001f940 EFLAGS: 00010246\n[    9.582200] RAX: dffffc0000000000 RBX: 1ffff92000003f2b RCX: 1ffff110200d806c\n[    9.582201] RDX: ffff8881006c0360 RSI: 0000000000000004 RDI: ffffffff9bc7b460\n[    9.582202] RBP: 0000000000000000 R08: 0000000000000000 R09: fffffbfff3a62324\n[    9.582203] R10: ffffffff9d311923 R11: 0000000000000000 R12: ffffea0004001b00\n[    9.582204] R13: 0000000000002000 R14: ffffea0000000000 R15: ffff8881006c0360\n[    9.582206] FS:  00007ffbbcf2d940(0000) GS:ffff888450479000(0000) knlGS:0000000000000000\n[    9.582208] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n[    9.582210] CR2: 000055ee3aa260d0 CR3: 0000000148b67005 CR4: 0000000000770ef0\n[    9.582211] PKRU: 55555554\n[    9.582212] Call Trace:\n[    9.582213]  <TASK>\n[    9.582214]  ? __pfx___pgalloc_tag_sub+0x10/0x10\n[    9.582216]  ? check_bytes_and_report+0x68/0x140\n[    9.582219]  __free_frozen_pages+0x2e4/0x1150\n[    9.582221]  ? __free_slab+0xc2/0x2b0\n[    9.582224]  qlist_free_all+0x4c/0xf0\n[    9.582227]  kasan_quarantine_reduce+0x15d/0x180\n[    9.582229]  __kasan_slab_alloc+0x69/0x90\n[    9.582232]  kmem_cache_alloc_noprof+0x14a/0x500\n[    9.582234]  do_getname+0x96/0x310\n[    9.582237]  do_readlinkat+0x91/0x2f0\n[    9.582239]  ? __pfx_do_readlinkat+0x10/0x10\n[    9.582240]  ? get_random_bytes_user+0x1df/0x2c0\n[    9.582244]  __x64_sys_readlinkat+0x96/0x100\n[    9.582246]  do_syscall_64+0xce/0x650\n[    9.582250]  ? __x64_sys_getrandom+0x13a/0x1e0\n[    9.582252]  ? __pfx___x64_sys_getrandom+0x10/0x10\n[    9.582254]  ? do_syscall_64+0x114/0x650\n[    9.582255]  ? ksys_read+0xfc/0x1d0\n[    9.582258]  ? __pfx_ksys_read+0x10/0x10\n[    9.582260]  ? do_syscall_64+0x114/0x650\n[    9.582262]  ? do_syscall_64+0x114/0x650\n[    9.582264]  ? __pfx_fput_close_sync+0x10/0x10\n[    9.582266]  ? file_close_fd_locked+0x178/0x2a0\n[    9.582268]  ? __x64_sys_faccessat2+0x96/0x100\n[    9.582269]  ? __x64_sys_close+0x7d/0xd0\n[    9.582271]  ? do_syscall_64+0x114/0x650\n[    9.582273]  ? do_syscall_64+0x114/0x650\n[    9.582275]  ? clear_bhb_loop+0x50/0xa0\n[    9.582277]  ? clear_bhb_l\n---truncated---",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
  } ],
  "affected" : [ ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-46279"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/6b1842775a460245e97d36d3a67d0cfba7c4ff79"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/b49dfabc38cad5e50af24f63edd124a10de3ebb6"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/d5b495ba9de0423ef39f8bd86729a885870c7efe"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-415" ],
    "severity" : "HIGH",
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-06-08T17:16:45Z"
  }
}