CVE-2023-53862

HIGHPre-NVD 7.87.8—
EchelonGraph scoreMEDIUM confidence

Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2025-12-09. the CNA's CVSS baseline 7.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cna:linux, epss, ghsa
Trending — 4 sources updated this week
7.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.8Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

In the Linux kernel, the following vulnerability has been resolved:

hfs: fix missing hfs_bnode_get() in __hfs_bnode_create

Syzbot found a kernel BUG in hfs_bnode_put():

kernel BUG at fs/hfs/bnode.c:466! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 3634 Comm: kworker/u4:5 Not tainted 6.1.0-rc7-syzkaller-00190-g97ee9d1c1696 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 Workqueue: writeback wb_workfn (flush-7:0) RIP: 0010:hfs_bnode_put+0x46f/0x480 fs/hfs/bnode.c:466 Code: 8a 80 ff e9 73 fe ff ff 89 d9 80 e1 07 80 c1 03 38 c1 0f 8c a0 fe ff ff 48 89 df e8 db 8a 80 ff e9 93 fe ff ff e8 a1 68 2c ff <0f> 0b e8 9a 68 2c ff 0f 0b 0f 1f 84 00 00 00 00 00 55 41 57 41 56 RSP: 0018:ffffc90003b4f258 EFLAGS: 00010293 RAX: ffffffff825e318f RBX: 0000000000000000 RCX: ffff8880739dd7c0 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffc90003b4f430 R08: ffffffff825e2d9b R09: ffffed10045157d1 R10: ffffed10045157d1 R11: 1ffff110045157d0 R12: ffff8880228abe80 R13: ffff88807016c000 R14: dffffc0000000000 R15: ffff8880228abe00 FS: 0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fa6ebe88718 CR3: 000000001e93d000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: hfs_write_inode+0x1bc/0xb40 write_inode fs/fs-writeback.c:1440 [inline] __writeback_single_inode+0x4d6/0x670 fs/fs-writeback.c:1652 writeback_sb_inodes+0xb3b/0x18f0 fs/fs-writeback.c:1878 __writeback_inodes_wb+0x125/0x420 fs/fs-writeback.c:1949 wb_writeback+0x440/0x7b0 fs/fs-writeback.c:2054 wb_check_start_all fs/fs-writeback.c:2176 [inline] wb_do_writeback fs/fs-writeback.c:2202 [inline] wb_workfn+0x827/0xef0 fs/fs-writeback.c:2235 process_one_work+0x877/0xdb0 kernel/workqueue.c:2289 worker_thread+0xb14/0x1330 kernel/workqueue.c:2436 kthread+0x266/0x300 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306

The BUG_ON() is triggered at here:

/* Dispose of resources used by a node */ void hfs_bnode_put(struct hfs_bnode *node) { if (node) { BUG_ON(!atomic_read(&node->refcnt)); <- we have issue here!!!! } }

By tracing the refcnt, I found the node is created by hfs_bmap_alloc() with refcnt 1. Then the node is used by hfs_btree_write(). There is a missing of hfs_bnode_get() after find the node. The issue happened in following path:

hfs_bmap_alloc hfs_bnode_find __hfs_bnode_create <- allocate a new node with refcnt 1. hfs_bnode_put <- decrease the refcnt

hfs_btree_write hfs_bnode_find __hfs_bnode_create hfs_bnode_findhash <- find the node without refcnt increased. hfs_bnode_put <- trigger the BUG_ON() since refcnt is 0.

CVSS v3
7.8
EG Score
7.8(medium)
EG Risk
40(Track)
EG Risk 40/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity78% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
6%
KEV
Not listed

Published

December 9, 2025

Last Modified

August 5, 2026

Advisory Details (8)

Auto-updated Aug 4, 2026
No patch confirmed yet.
generic

hfs: fix missing hfs_bnode_get() in __hfs_bnode_create - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/eda6879272e4df5456afc36642052ea066f58410
generic

hfs: fix missing hfs_bnode_get() in __hfs_bnode_create - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/dc9f78b6d254427a06e568f2887b1011ef3143ef
generic

hfs: fix missing hfs_bnode_get() in __hfs_bnode_create - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/a9dc087fd3c484fd1ed18c5efb290efaaf44ce03
generic

hfs: fix missing hfs_bnode_get() in __hfs_bnode_create - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/8140cdc57bc5844cd5e1392673ec2dbf8fdc6940
generic

hfs: fix missing hfs_bnode_get() in __hfs_bnode_create - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/3a9065a33988c02789722be612f7c42fb8ebbb22
generic

hfs: fix missing hfs_bnode_get() in __hfs_bnode_create - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/38d72e6604b9f96dffcc0565090cc01622a37b2a
generic

hfs: fix missing hfs_bnode_get() in __hfs_bnode_create - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/2cab8db14566cf6a516c1f103a60cf6b7f54b1e5
generic

hfs: fix missing hfs_bnode_get() in __hfs_bnode_create - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/062af3e9930762d1fd22946748d34e0d859e4a8e

Vendor Advisories for CVE-2023-53862(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(1)

Vendor / EcosystemFixed in / PatchReleasedSource
linuxKernel @ 4.14.308—osv

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Data Freshness Timeline

(refreshed 15× in last 7d / 49× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 139 total refreshes for this CVE.

  1. 2026-08-05 19:15 UTCEPSS rescore
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Related CVEs(same product)

Frequently asked(5)

What is CVE-2023-53862?
CVE-2023-53862 is a high vulnerability published on December 9, 2025. In the Linux kernel, the following vulnerability has been resolved: hfs: fix missing hfsbnodeget() in hfsbnodecreate Syzbot found a kernel BUG in hfsbnodeput(): kernel BUG at fs/hfs/bnode.c:466! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 3634 Comm: kworker/u4:5 Not tainted…
When was CVE-2023-53862 disclosed?
CVE-2023-53862 was first published in the National Vulnerability Database on December 9, 2025, with the most recent update on August 5, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2023-53862 actively exploited?
CVE-2023-53862 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 93.7% of all scored CVEs.
What is the CVSS score of CVE-2023-53862?
CVE-2023-53862 has a CVSS v4.0 base score of 7.8 (CNA self-assessment; NVD's own analysis pending).
How do I remediate CVE-2023-53862?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2023-53862, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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