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CVE-2026-98553— autofs: fix sbi->pipe file reference leak in autofs_kill_sb()

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

在 Linux 内核中，以下漏洞已得到修复： autofs：修复 autofs_kill_sb() 中 sbi->pipe 文件引用的泄漏问题。 当 autofs_fill_super() 在清除 AUTOFS_SBI_CATATONIC 标志之前失败时（例如，因无效 pgrp 挂载选项导致 find_get_pid() 失败，或在挂载前 fs_context 被关闭），deactivate_locked_super() 会调用 autofs_kill_sb()，进而调用 autofs_catatonic_mode

AI Predicted 5.5 Difficulty: Moderate

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux ebc921ca9b92a3cf304d99bd7b7f373ec78c7ed7< 3684e2273ba94553af3c5195a46a50214a1a96e3 affected
ebc921ca9b92a3cf304d99bd7b7f373ec78c7ed7< 0662b1ff9b383d5a233d344e4dc518c27a17f7b8 affected
ebc921ca9b92a3cf304d99bd7b7f373ec78c7ed7< 34fa4c1c6e10507dc60e35a82cc9655666946cfd affected
ebc921ca9b92a3cf304d99bd7b7f373ec78c7ed7< a58593b501b7be5ad2bc5181bfa8cd4599be257c affected
ebc921ca9b92a3cf304d99bd7b7f373ec78c7ed7< f1c57f5b16bbc3571bd479c290996c4d4e1fb931 affected
ebc921ca9b92a3cf304d99bd7b7f373ec78c7ed7< 4bcb371019097d0e357f097902587401c509bbc9 affected
ebc921ca9b92a3cf304d99bd7b7f373ec78c7ed7< fc4fd0281ac80b5a3c5a2330f688f0f9d2a420b6 affected
ebc921ca9b92a3cf304d99bd7b7f373ec78c7ed7< aa5e44b29ffe4eaa08cc2237fd65bc2596bc023e affected
… +10 more rows
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I. Basic Information for CVE-2026-98553

Vulnerability Information
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Vulnerability Title
autofs: fix sbi->pipe file reference leak in autofs_kill_sb()
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: autofs: fix sbi->pipe file reference leak in autofs_kill_sb() When autofs_fill_super() fails before clearing AUTOFS_SBI_CATATONIC (for example, when find_get_pid() fails on an invalid pgrp mount option, or when an fs_context is closed before mounting), deactivate_locked_super() invokes autofs_kill_sb() -> autofs_catatonic_mode(sbi). Because AUTOFS_SBI_CATATONIC is still set in sbi->flags, autofs_catatonic_mode() returns early without calling fput(sbi->pipe), permanently leaking the pipe struct file reference. Explicitly release sbi->pipe in autofs_kill_sb() if it is still non-NULL after autofs_catatonic_mode().
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux ebc921ca9b92a3cf304d99bd7b7f373ec78c7ed7 ~ 3684e2273ba94553af3c5195a46a50214a1a96e3 -
Linux Linux 4.18 -

II. Public POCs for CVE-2026-98553

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III. Intelligence Information for CVE-2026-98553

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Patches & Fixes for CVE-2026-98553 (8)

Same Patch Batch · Linux · 2026-10-18 · 435 CVEs total

CVE-2026-98720 KVM: nVMX: Force MSR bitmap refresh if runtime eVMCS controls are modified
CVE-2026-98733 Bluetooth: hci_core: Serialize fragmented ISO packet queueing
CVE-2026-98732 Bluetooth: btintel: fix buffer over-read in btintel_hw_error()
CVE-2026-98731 Bluetooth: btintel_pcie: fix plen overflow in btintel_pcie_recv_frame()
CVE-2026-98730 Bluetooth: btintel_pcie: reject oversized TX packets in send_frame()
CVE-2026-98729 x86/mm: Don't apply va_align to hugetlb mappings on AMD F15h
CVE-2026-98728 tpm: fix off-by-four bounds check in tpm2_get_random()
CVE-2026-98727 nvme-multipath: set BLK_FEAT_ZONED only after the zone info is known
CVE-2026-98726 nvme-multipath: fix underflow in ANA log bounds checks
CVE-2026-98725 nvmet-auth: fix out-of-bounds write in nvmet_auth_challenge()
CVE-2026-98724 nvmet: pci-epf: reject too-short SGL segments
CVE-2026-98723 nvmet: copy the hostid into the ctrl before creating PR pc_refs
CVE-2026-98722 mtd: block2mtd: Fix divide error when erase_size is zero
CVE-2026-98721 mtd: rawnand: cadence: Initialize IRQ state before requesting IRQ
CVE-2026-98709 wifi: mac80211: count only matching reservations in reserved switch
CVE-2026-98712 KVM: arm64: vgic: Take a refcount on IRQs referenced by last_lr_irq
CVE-2026-98711 wifi: cw1200: fix TX padding OOB read leaking heap data to device
CVE-2026-98710 wifi: iwlegacy: 3945: free EEPROM data on remove
CVE-2026-98713 KVM: arm64: Apply the fine-grained UNDEFs without FEAT_FGT
CVE-2026-98707 wifi: mac80211: shut down RX BA session timer on teardown

Showing top 20 of 435 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

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