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CVE-2024-47660— fsnotify: clear PARENT_WATCHED flags lazily

EPSS 0.01% · P2
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I. Basic Information for CVE-2024-47660

Vulnerability Information
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Vulnerability Title
fsnotify: clear PARENT_WATCHED flags lazily
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: fsnotify: clear PARENT_WATCHED flags lazily In some setups directories can have many (usually negative) dentries. Hence __fsnotify_update_child_dentry_flags() function can take a significant amount of time. Since the bulk of this function happens under inode->i_lock this causes a significant contention on the lock when we remove the watch from the directory as the __fsnotify_update_child_dentry_flags() call from fsnotify_recalc_mask() races with __fsnotify_update_child_dentry_flags() calls from __fsnotify_parent() happening on children. This can lead upto softlockup reports reported by users. Fix the problem by calling fsnotify_update_children_dentry_flags() to set PARENT_WATCHED flags only when parent starts watching children. When parent stops watching children, clear false positive PARENT_WATCHED flags lazily in __fsnotify_parent() for each accessed child.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
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。攻击者利用该漏洞导致软锁定。
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

VendorProductAffected VersionsCPESubscribe
LinuxLinux 873feea09ebc980cbd3631b767356ce1eee65ec1 ~ 3f3ef1d9f66b93913ce2171120d9226b55acd41d -
LinuxLinux 2.6.38 -

II. Public POCs for CVE-2024-47660

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III. Intelligence Information for CVE-2024-47660

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Same Patch Batch · Linux · 2024-10-09 · 17 CVEs total

CVE-2024-46870drm/amd/display: Disable DMCUB timeout for DCN35
CVE-2024-46871drm/amd/display: Correct the defined value for AMDGPU_DMUB_NOTIFICATION_MAX
CVE-2024-47658crypto: stm32/cryp - call finalize with bh disabled
CVE-2024-47659smack: tcp: ipv4, fix incorrect labeling
CVE-2024-47662drm/amd/display: Remove register from DCN35 DMCUB diagnostic collection
CVE-2024-47661drm/amd/display: Avoid overflow from uint32_t to uint8_t
CVE-2024-47663staging: iio: frequency: ad9834: Validate frequency parameter value
CVE-2024-47664spi: hisi-kunpeng: Add verification for the max_frequency provided by the firmware
CVE-2024-47665i3c: mipi-i3c-hci: Error out instead on BUG_ON() in IBI DMA setup
CVE-2024-47666scsi: pm80xx: Set phy->enable_completion only when we wait for it
CVE-2024-47667PCI: keystone: Add workaround for Errata #i2037 (AM65x SR 1.0)
CVE-2024-47668lib/generic-radix-tree.c: Fix rare race in __genradix_ptr_alloc()
CVE-2024-47669nilfs2: fix state management in error path of log writing function
CVE-2024-47670ocfs2: add bounds checking to ocfs2_xattr_find_entry()
CVE-2024-47671USB: usbtmc: prevent kernel-usb-infoleak
CVE-2024-47673wifi: iwlwifi: mvm: pause TCM when the firmware is stopped

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2024-47660

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