CVE-2021-47178: Software Security Vulnerability Vulnerability

MODERATE
Advisory Identifier: GHSA-vmqf-grh3-9rrr
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CVSS 5.5
CWE-459
Published
Advisory Summary

CVE-2021-47178 is a MODERATE (CVSS 5.5) security vulnerability vulnerability (CWE-459: Incomplete Cleanup) affecting Software libraries in the Maven ecosystem. The weakness occurs when the product does not properly "clean up" and remove temporary or supporting resources after they have been used.. Remediation is available in the latest vendor maintenance releases.

CVE-2021-47178 at a Glance

CVE Identifier CVE-2021-47178
GHSA Identifier GHSA-vmqf-grh3-9rrr
Severity MODERATE
CVSS v3.1 Base Score 5.5
CWE Classification CWE-459: Incomplete Cleanup
Affected Product Software
Package Ecosystem Maven
Published Date
Last Updated

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).

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 None (C:N)
Integrity None (I:N)
Availability High (A:H)

How to Fix CVE-2021-47178

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-2021-47178, 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-459: Incomplete Cleanup, where the product does not properly "clean up" and remove temporary or supporting resources after they have been used. 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: scsi: target: core: Avoid smp_processor_id() in preemptible code The BUG message "BUG: using smp_processor_id() in preemptible [00000000] code" was observed for TCMU devices with kernel config DEBUG_PREEMPT. The message was observed when blktests block/005 was run on TCMU devices with fileio backend or user:zbc backend [1]. The commit 1130b499b4a7 ("scsi: target: tcm_loop: Use LIO wq cmd submission helper") triggered the symptom. The commit modified work queue to handle commands and changed 'current->nr_cpu_allowed' at smp_processor_id() call. The message was also observed at system shutdown when TCMU devices were not cleaned up [2]. The function smp_processor_id() was called in SCSI host work queue for abort handling, and triggered the BUG message. This symptom was observed regardless of the commit 1130b499b4a7 ("scsi: target: tcm_loop: Use LIO wq cmd submission helper"). To avoid the preemptible code check at smp_processor_id(), get CPU ID with raw_smp_processor_id() instead. The CPU ID is used for performance improvement then thread move to other CPU will not affect the code. [1] [ 56.468103] run blktests block/005 at 2021-05-12 14:16:38 [ 57.369473] check_preemption_disabled: 85 callbacks suppressed [ 57.369480] BUG: using smp_processor_id() in preemptible [00000000] code: fio/1511 [ 57.369506] BUG: using smp_processor_id() in preemptible [00000000] code: fio/1510 [ 57.369512] BUG: using smp_processor_id() in preemptible [00000000] code: fio/1506 [ 57.369552] caller is __target_init_cmd+0x157/0x170 [target_core_mod] [ 57.369606] CPU: 4 PID: 1506 Comm: fio Not tainted 5.13.0-rc1+ #34 [ 57.369613] Hardware name: System manufacturer System Product Name/PRIME Z270-A, BIOS 1302 03/15/2018 [ 57.369617] Call Trace: [ 57.369621] BUG: using smp_processor_id() in preemptible [00000000] code: fio/1507 [ 57.369628] dump_stack+0x6d/0x89 [ 57.369642] check_preemption_disabled+0xc8/0xd0 [ 57.369628] caller is __target_init_cmd+0x157/0x170 [target_core_mod] [ 57.369655] __target_init_cmd+0x157/0x170 [target_core_mod] [ 57.369695] target_init_cmd+0x76/0x90 [target_core_mod] [ 57.369732] tcm_loop_queuecommand+0x109/0x210 [tcm_loop] [ 57.369744] scsi_queue_rq+0x38e/0xc40 [ 57.369761] __blk_mq_try_issue_directly+0x109/0x1c0 [ 57.369779] blk_mq_try_issue_directly+0x43/0x90 [ 57.369790] blk_mq_submit_bio+0x4e5/0x5d0 [ 57.369812] submit_bio_noacct+0x46e/0x4e0 [ 57.369830] __blkdev_direct_IO_simple+0x1a3/0x2d0 [ 57.369859] ? set_init_blocksize.isra.0+0x60/0x60 [ 57.369880] generic_file_read_iter+0x89/0x160 [ 57.369898] blkdev_read_iter+0x44/0x60 [ 57.369906] new_sync_read+0x102/0x170 [ 57.369929] vfs_read+0xd4/0x160 [ 57.369941] __x64_sys_pread64+0x6e/0xa0 [ 57.369946] ? lockdep_hardirqs_on+0x79/0x100 [ 57.369958] do_syscall_64+0x3a/0x70 [ 57.369965] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 57.369973] RIP: 0033:0x7f7ed4c1399f [ 57.369979] Code: 08 89 3c 24 48 89 4c 24 18 e8 7d f3 ff ff 4c 8b 54 24 18 48 8b 54 24 10 41 89 c0 48 8b 74 24 08 8b 3c 24 b8 11 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 31 44 89 c7 48 89 04 24 e8 cd f3 ff ff 48 8b [ 57.369983] RSP: 002b:00007ffd7918c580 EFLAGS: 00000293 ORIG_RAX: 0000000000000011 [ 57.369990] RAX: ffffffffffffffda RBX: 00000000015b4540 RCX: 00007f7ed4c1399f [ 57.369993] RDX: 0000000000001000 RSI: 00000000015de000 RDI: 0000000000000009 [ 57.369996] RBP: 00000000015b4540 R08: 0000000000000000 R09: 0000000000000001 [ 57.369999] R10: 0000000000e5c000 R11: 0000000000000293 R12: 00007f7eb5269a70 [ 57.370002] R13: 0000000000000000 R14: 0000000000001000 R15: 00000000015b4568 [ 57.370031] CPU: 7 PID: 1507 Comm: fio Not tainted 5.13.0-rc1+ #34 [ 57.370036] Hardware name: System manufacturer System Product Name/PRIME Z270-A, BIOS 1302 03/15/2018 [ 57.370039] Call Trace: [ 57.370045] dump_stack+0x6d/0x89 [ 57.370056] ch ---truncated---

References

NVD — CVE-2021-47178 NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-47178
git.kernel.org/stable/c/70ca3c57ff... WEB
https://git.kernel.org/stable/c/70ca3c57ff914113f681e657634f7fbfa68e1ad1
git.kernel.org/stable/c/a20b6eaf4f... WEB
https://git.kernel.org/stable/c/a20b6eaf4f35046a429cde57bee7eb5f13d6857f
git.kernel.org/stable/c/a222d2794c... WEB
https://git.kernel.org/stable/c/a222d2794c53f8165de20aa91b39e35e4b72bce9

Frequently Asked Questions

What is CVE-2021-47178?
CVE-2021-47178 is a security vulnerability in Software classified as a security vulnerability vulnerability under CWE-459: Incomplete Cleanup.
Which Software versions are affected?
Affected versions include releases prior to current release patches.
What version fixes CVE-2021-47178?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What is the CVSS score of CVE-2021-47178?
CVE-2021-47178 has a CVSS v3.1 base score of 5.5 (MODERATE) with vector string CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
What CWE is associated with CVE-2021-47178?
CVE-2021-47178 is classified under CWE-459: Incomplete Cleanup (The product does not properly "clean up" and remove temporary or supporting resources after they have been used.).
How can I check Maven dependencies for CVE-2021-47178?
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-vmqf-grh3-9rrr",
  "modified" : "2025-03-17T15:31:36Z",
  "published" : "2024-03-25T12:30:52Z",
  "aliases" : [ "CVE-2021-47178" ],
  "details" : "In the Linux kernel, the following vulnerability has been resolved:\n\nscsi: target: core: Avoid smp_processor_id() in preemptible code\n\nThe BUG message \"BUG: using smp_processor_id() in preemptible [00000000]\ncode\" was observed for TCMU devices with kernel config DEBUG_PREEMPT.\n\nThe message was observed when blktests block/005 was run on TCMU devices\nwith fileio backend or user:zbc backend [1]. The commit 1130b499b4a7\n(\"scsi: target: tcm_loop: Use LIO wq cmd submission helper\") triggered the\nsymptom. The commit modified work queue to handle commands and changed\n'current->nr_cpu_allowed' at smp_processor_id() call.\n\nThe message was also observed at system shutdown when TCMU devices were not\ncleaned up [2]. The function smp_processor_id() was called in SCSI host\nwork queue for abort handling, and triggered the BUG message. This symptom\nwas observed regardless of the commit 1130b499b4a7 (\"scsi: target:\ntcm_loop: Use LIO wq cmd submission helper\").\n\nTo avoid the preemptible code check at smp_processor_id(), get CPU ID with\nraw_smp_processor_id() instead. The CPU ID is used for performance\nimprovement then thread move to other CPU will not affect the code.\n\n[1]\n\n[   56.468103] run blktests block/005 at 2021-05-12 14:16:38\n[   57.369473] check_preemption_disabled: 85 callbacks suppressed\n[   57.369480] BUG: using smp_processor_id() in preemptible [00000000] code: fio/1511\n[   57.369506] BUG: using smp_processor_id() in preemptible [00000000] code: fio/1510\n[   57.369512] BUG: using smp_processor_id() in preemptible [00000000] code: fio/1506\n[   57.369552] caller is __target_init_cmd+0x157/0x170 [target_core_mod]\n[   57.369606] CPU: 4 PID: 1506 Comm: fio Not tainted 5.13.0-rc1+ #34\n[   57.369613] Hardware name: System manufacturer System Product Name/PRIME Z270-A, BIOS 1302 03/15/2018\n[   57.369617] Call Trace:\n[   57.369621] BUG: using smp_processor_id() in preemptible [00000000] code: fio/1507\n[   57.369628]  dump_stack+0x6d/0x89\n[   57.369642]  check_preemption_disabled+0xc8/0xd0\n[   57.369628] caller is __target_init_cmd+0x157/0x170 [target_core_mod]\n[   57.369655]  __target_init_cmd+0x157/0x170 [target_core_mod]\n[   57.369695]  target_init_cmd+0x76/0x90 [target_core_mod]\n[   57.369732]  tcm_loop_queuecommand+0x109/0x210 [tcm_loop]\n[   57.369744]  scsi_queue_rq+0x38e/0xc40\n[   57.369761]  __blk_mq_try_issue_directly+0x109/0x1c0\n[   57.369779]  blk_mq_try_issue_directly+0x43/0x90\n[   57.369790]  blk_mq_submit_bio+0x4e5/0x5d0\n[   57.369812]  submit_bio_noacct+0x46e/0x4e0\n[   57.369830]  __blkdev_direct_IO_simple+0x1a3/0x2d0\n[   57.369859]  ? set_init_blocksize.isra.0+0x60/0x60\n[   57.369880]  generic_file_read_iter+0x89/0x160\n[   57.369898]  blkdev_read_iter+0x44/0x60\n[   57.369906]  new_sync_read+0x102/0x170\n[   57.369929]  vfs_read+0xd4/0x160\n[   57.369941]  __x64_sys_pread64+0x6e/0xa0\n[   57.369946]  ? lockdep_hardirqs_on+0x79/0x100\n[   57.369958]  do_syscall_64+0x3a/0x70\n[   57.369965]  entry_SYSCALL_64_after_hwframe+0x44/0xae\n[   57.369973] RIP: 0033:0x7f7ed4c1399f\n[   57.369979] Code: 08 89 3c 24 48 89 4c 24 18 e8 7d f3 ff ff 4c 8b 54 24 18 48 8b 54 24 10 41 89 c0 48 8b 74 24 08 8b 3c 24 b8 11 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 31 44 89 c7 48 89 04 24 e8 cd f3 ff ff 48 8b\n[   57.369983] RSP: 002b:00007ffd7918c580 EFLAGS: 00000293 ORIG_RAX: 0000000000000011\n[   57.369990] RAX: ffffffffffffffda RBX: 00000000015b4540 RCX: 00007f7ed4c1399f\n[   57.369993] RDX: 0000000000001000 RSI: 00000000015de000 RDI: 0000000000000009\n[   57.369996] RBP: 00000000015b4540 R08: 0000000000000000 R09: 0000000000000001\n[   57.369999] R10: 0000000000e5c000 R11: 0000000000000293 R12: 00007f7eb5269a70\n[   57.370002] R13: 0000000000000000 R14: 0000000000001000 R15: 00000000015b4568\n[   57.370031] CPU: 7 PID: 1507 Comm: fio Not tainted 5.13.0-rc1+ #34\n[   57.370036] Hardware name: System manufacturer System Product Name/PRIME Z270-A, BIOS 1302 03/15/2018\n[   57.370039] Call Trace:\n[   57.370045]  dump_stack+0x6d/0x89\n[   57.370056]  ch\n---truncated---",
  "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-2021-47178"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/70ca3c57ff914113f681e657634f7fbfa68e1ad1"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/a20b6eaf4f35046a429cde57bee7eb5f13d6857f"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/a222d2794c53f8165de20aa91b39e35e4b72bce9"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-459" ],
    "severity" : "MODERATE",
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2024-03-25T10:15:09Z"
  }
}