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CVE-2024-42304— ext4: make sure the first directory block is not a hole

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，该漏洞源于未能正确检查根目录块是否为空。

CVSS 7.8 · High EPSS 0.23% · P13

Affected Version Matrix 27

VendorProduct Version RangeStatus
Linux Linux 3a17ca864baffc0c6f6e8aad525aa4365775a193< d81d7e347d1f1f48a5634607d39eb90c161c8afe affected
4e19d6b65fb4fc42e352ce9883649e049da14743< e02f9941e8c011aa3eafa799def6a134ce06bcfa affected
4e19d6b65fb4fc42e352ce9883649e049da14743< de2a011a13a46468a6e8259db58b1b62071fe136 affected
4e19d6b65fb4fc42e352ce9883649e049da14743< 9771e3d8365ae1dd5e8846a204cb9af14e3e656a affected
4e19d6b65fb4fc42e352ce9883649e049da14743< b609753cbbd38f8c0affd4956c0af178348523ac affected
4e19d6b65fb4fc42e352ce9883649e049da14743< c3893d9de8ee153baac56d127d844103488133b5 affected
4e19d6b65fb4fc42e352ce9883649e049da14743< 299bc6ffa57e04e74c6cce866d6c0741fb4897a1 affected
4e19d6b65fb4fc42e352ce9883649e049da14743< f9ca51596bbfd0f9c386dd1c613c394c78d9e5e6 affected
… +19 more rows
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I. Basic Information for CVE-2024-42304

Vulnerability Information
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Vulnerability Title
ext4: make sure the first directory block is not a hole
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: ext4: make sure the first directory block is not a hole The syzbot constructs a directory that has no dirblock but is non-inline, i.e. the first directory block is a hole. And no errors are reported when creating files in this directory in the following flow. ext4_mknod ... ext4_add_entry // Read block 0 ext4_read_dirblock(dir, block, DIRENT) bh = ext4_bread(NULL, inode, block, 0) if (!bh && (type == INDEX || type == DIRENT_HTREE)) // The first directory block is a hole // But type == DIRENT, so no error is reported. After that, we get a directory block without '.' and '..' but with a valid dentry. This may cause some code that relies on dot or dotdot (such as make_indexed_dir()) to crash. Therefore when ext4_read_dirblock() finds that the first directory block is a hole report that the filesystem is corrupted and return an error to avoid loading corrupted data from disk causing something bad.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
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，该漏洞源于未能正确检查根目录块是否为空。
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 3a17ca864baffc0c6f6e8aad525aa4365775a193 ~ d81d7e347d1f1f48a5634607d39eb90c161c8afe -
Linux Linux 5.3 -

II. Public POCs for CVE-2024-42304

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III. Intelligence Information for CVE-2024-42304

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Other References for CVE-2024-42304 (8)

Same Patch Batch · Linux · 2024-08-17 · 109 CVEs total

CVE-2024-42285 9.8 CRITICAL RDMA/iwcm: Fix a use-after-free related to destroying CM IDs
CVE-2024-42284 9.1 CRITICAL tipc: Return non-zero value from tipc_udp_addr2str() on error
CVE-2024-42318 8.8 HIGH landlock: Don't lose track of restrictions on cred_transfer
CVE-2024-42287 8.8 HIGH scsi: qla2xxx: Complete command early within lock
CVE-2024-43847 8.8 HIGH wifi: ath12k: fix invalid memory access while processing fragmented packets
CVE-2024-43848 8.8 HIGH wifi: mac80211: fix TTLM teardown work
CVE-2024-42279 7.8 HIGH spi: microchip-core: ensure TX and RX FIFOs are empty at start of a transfer
CVE-2024-42314 7.8 HIGH btrfs: fix extent map use-after-free when adding pages to compressed bio
CVE-2024-42297 7.8 HIGH f2fs: fix to don't dirty inode for readonly filesystem
CVE-2024-43840 7.8 HIGH bpf, arm64: Fix trampoline for BPF_TRAMP_F_CALL_ORIG
CVE-2024-42296 7.8 HIGH f2fs: fix return value of f2fs_convert_inline_inode()
CVE-2024-43832 7.8 HIGH s390/uv: Don't call folio_wait_writeback() without a folio reference
CVE-2024-42293 7.8 HIGH arm64: mm: Fix lockless walks with static and dynamic page-table folding
CVE-2024-43830 7.8 HIGH leds: trigger: Unregister sysfs attributes before calling deactivate()
CVE-2024-42299 7.8 HIGH fs/ntfs3: Update log->page_{mask,bits} if log->page_size changed
CVE-2024-43845 7.8 HIGH udf: Fix bogus checksum computation in udf_rename()
CVE-2024-42288 7.8 HIGH scsi: qla2xxx: Fix for possible memory corruption
CVE-2024-43846 7.8 HIGH lib: objagg: Fix general protection fault
CVE-2024-42280 7.8 HIGH mISDN: Fix a use after free in hfcmulti_tx()
CVE-2024-42313 7.8 HIGH media: venus: fix use after free in vdec_close

Showing top 20 of 109 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2024-42304

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