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CVE-2024-39469— nilfs2: fix nilfs_empty_dir() misjudgment and long loop on I/O errors

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nilfs_empty_dir函数在目录 folio/page 读取失败时的错误处理不正确。

CVSS 7.1 · High EPSS 0.25% · P16

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux 2ba466d74ed74f073257f86e61519cb8f8f46184< 2ac8a2fe22bdde9eecce2a42cf5cab79333fb428 affected
2ba466d74ed74f073257f86e61519cb8f8f46184< 405b71f1251e5ae865f53bd27c45114e6c83bee3 affected
2ba466d74ed74f073257f86e61519cb8f8f46184< c77ad608df6c091fe64ecb91f41ef7cb465587f1 affected
2ba466d74ed74f073257f86e61519cb8f8f46184< 11a2edb70356a2202dcb7c9c189c8356ab4752cd affected
2ba466d74ed74f073257f86e61519cb8f8f46184< 129dcd3e7d036218db3f59c82d82004b9539ed82 affected
2ba466d74ed74f073257f86e61519cb8f8f46184< d18b05eda7fa77f02114f15b02c009f28ee42346 affected
2ba466d74ed74f073257f86e61519cb8f8f46184< 59f14875a96ef93f05b82ad3c980605f2cb444b5 affected
2ba466d74ed74f073257f86e61519cb8f8f46184< 7373a51e7998b508af7136530f3a997b286ce81c affected
… +10 more rows
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I. Basic Information for CVE-2024-39469

Vulnerability Information
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Vulnerability Title
nilfs2: fix nilfs_empty_dir() misjudgment and long loop on I/O errors
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: nilfs2: fix nilfs_empty_dir() misjudgment and long loop on I/O errors The error handling in nilfs_empty_dir() when a directory folio/page read fails is incorrect, as in the old ext2 implementation, and if the folio/page cannot be read or nilfs_check_folio() fails, it will falsely determine the directory as empty and corrupt the file system. In addition, since nilfs_empty_dir() does not immediately return on a failed folio/page read, but continues to loop, this can cause a long loop with I/O if i_size of the directory's inode is also corrupted, causing the log writer thread to wait and hang, as reported by syzbot. Fix these issues by making nilfs_empty_dir() immediately return a false value (0) if it fails to get a directory folio/page.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/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nilfs_empty_dir函数在目录 folio/page 读取失败时的错误处理不正确。
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 2ba466d74ed74f073257f86e61519cb8f8f46184 ~ 2ac8a2fe22bdde9eecce2a42cf5cab79333fb428 -
Linux Linux 2.6.30 -

II. Public POCs for CVE-2024-39469

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III. Intelligence Information for CVE-2024-39469

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Other References for CVE-2024-39469 (8)

Same Patch Batch · Linux · 2024-06-25 · 24 CVEs total

CVE-2024-39293 9.8 CRITICAL Revert "xsk: Support redirect to any socket bound to the same umem"
CVE-2024-39471 7.8 HIGH drm/amdgpu: add error handle to avoid out-of-bounds
CVE-2024-37354 7.8 HIGH btrfs: fix crash on racing fsync and size-extending write into prealloc
CVE-2024-37078 7.8 HIGH nilfs2: fix potential kernel bug due to lack of writeback flag waiting
CVE-2024-38306 7.8 HIGH btrfs: protect folio::private when attaching extent buffer folios
CVE-2024-38385 7.8 HIGH genirq/irqdesc: Prevent use-after-free in irq_find_at_or_after()
CVE-2024-39467 7.8 HIGH f2fs: fix to do sanity check on i_xattr_nid in sanity_check_inode()
CVE-2024-39463 7.8 HIGH 9p: add missing locking around taking dentry fid list
CVE-2024-39468 7.5 HIGH smb: client: fix deadlock in smb2_find_smb_tcon()
CVE-2024-39301 net/9p: fix uninit-value in p9_client_rpc()
CVE-2024-39470 eventfs: Fix a possible null pointer dereference in eventfs_find_events()
CVE-2024-39466 thermal/drivers/qcom/lmh: Check for SCM availability at probe
CVE-2024-39464 media: v4l: async: Fix notifier list entry init
CVE-2024-39465 media: mgb4: Fix double debugfs remove
CVE-2024-39462 clk: bcm: dvp: Assign ->num before accessing ->hws
CVE-2024-39461 clk: bcm: rpi: Assign ->num before accessing ->hws
CVE-2024-39371 io_uring: check for non-NULL file pointer in io_file_can_poll()
CVE-2021-4440 x86/xen: Drop USERGS_SYSRET64 paravirt call
CVE-2024-39298 mm/memory-failure: fix handling of dissolved but not taken off from buddy pages
CVE-2024-39296 bonding: fix oops during rmmod

Showing top 20 of 24 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2024-39469

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