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CVE-2026-31451— ext4: replace BUG_ON with proper error handling in ext4_read_inline_folio

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.

Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于ext4_read_inline_folio函数未正确处理内联数据大小超过PAGE_SIZE的情况，可能导致内核恐慌。

AI Predicted 4.3 Difficulty: Hard EPSS 0.13% · P2

Possible ATT&CK Techniques 1 AI

T1083 · File and Directory Discovery

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux 46c7f254543dedcf134ad05091ed2b935a9a597d< 3462a3f0716d27af51896dc8688bcf0628fb17ee affected
46c7f254543dedcf134ad05091ed2b935a9a597d< 636e8d85a36ab6c31aafd04ee66a69b18eebee7b affected
46c7f254543dedcf134ad05091ed2b935a9a597d< af25a6affeac4919e8d8c5cccc01a9d53478447e affected
46c7f254543dedcf134ad05091ed2b935a9a597d< 65c6c30ce6362c1c684568744ea510c921a756cd affected
46c7f254543dedcf134ad05091ed2b935a9a597d< d4b3f370c3d8f7ce565d4a718572c9f7c12f77ed affected
46c7f254543dedcf134ad05091ed2b935a9a597d< 823849a26af089ffc5dfdd2ae4b9d446b46a0cda affected
46c7f254543dedcf134ad05091ed2b935a9a597d< a7d600e04732a7d29b107c91fe3aec64cf6ce7f2 affected
46c7f254543dedcf134ad05091ed2b935a9a597d< 356227096eb66e41b23caf7045e6304877322edf affected
… +10 more rows
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I. Basic Information for CVE-2026-31451

Vulnerability Information
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Vulnerability Title
ext4: replace BUG_ON with proper error handling in ext4_read_inline_folio
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: ext4: replace BUG_ON with proper error handling in ext4_read_inline_folio Replace BUG_ON() with proper error handling when inline data size exceeds PAGE_SIZE. This prevents kernel panic and allows the system to continue running while properly reporting the filesystem corruption. The error is logged via ext4_error_inode(), the buffer head is released to prevent memory leak, and -EFSCORRUPTED is returned to indicate filesystem corruption.
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
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于ext4_read_inline_folio函数未正确处理内联数据大小超过PAGE_SIZE的情况，可能导致内核恐慌。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux 46c7f254543dedcf134ad05091ed2b935a9a597d ~ 3462a3f0716d27af51896dc8688bcf0628fb17ee -
Linux Linux 3.8 -

II. Public POCs for CVE-2026-31451

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III. Intelligence Information for CVE-2026-31451

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Patches & Fixes for CVE-2026-31451 (3)

Same Patch Batch · Linux · 2026-04-22 · 100 CVEs total

CVE-2026-31478 9.8 CRITICAL ksmbd: replace hardcoded hdr2_len with offsetof() in smb2_calc_max_out_buf_len()
CVE-2026-31463 9.8 CRITICAL iomap: fix invalid folio access when i_blkbits differs from I/O granularity
CVE-2026-31444 9.8 CRITICAL ksmbd: fix use-after-free and NULL deref in smb_grant_oplock()
CVE-2026-31436 9.8 CRITICAL dmaengine: idxd: fix possible wrong descriptor completion in llist_abort_desc()
CVE-2026-31501 9.8 CRITICAL net: ti: icssg-prueth: fix use-after-free of CPPI descriptor in RX path
CVE-2026-31448 9.4 CRITICAL ext4: avoid infinite loops caused by residual data
CVE-2026-31450 8.8 HIGH ext4: publish jinode after initialization
CVE-2026-31432 8.8 HIGH ksmbd: fix OOB write in QUERY_INFO for compound requests
CVE-2026-31433 8.8 HIGH ksmbd: fix potencial OOB in get_file_all_info() for compound requests
CVE-2026-31435 8.8 HIGH netfs: Fix read abandonment during retry
CVE-2026-31476 8.2 HIGH ksmbd: do not expire session on binding failure
CVE-2026-31464 8.1 HIGH scsi: ibmvfc: Fix OOB access in ibmvfc_discover_targets_done()
CVE-2026-31513 8.1 HIGH Bluetooth: L2CAP: Fix stack-out-of-bounds read in l2cap_ecred_conn_req
CVE-2026-31488 7.8 HIGH drm/amd/display: Do not skip unrelated mode changes in DSC validation
CVE-2026-31494 7.8 HIGH net: macb: use the current queue number for stats
CVE-2026-31479 7.8 HIGH drm/xe: always keep track of remap prev/next
CVE-2026-31502 7.8 HIGH team: fix header_ops type confusion with non-Ethernet ports
CVE-2026-31453 7.8 HIGH xfs: avoid dereferencing log items after push callbacks
CVE-2026-31504 7.8 HIGH net: fix fanout UAF in packet_release() via NETDEV_UP race
CVE-2026-31505 7.8 HIGH iavf: fix out-of-bounds writes in iavf_get_ethtool_stats()

Showing top 20 of 100 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-31451

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