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CVE-2025-21721— nilfs2: handle errors that nilfs_prepare_chunk() may return

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nilfs2未处理nilfs_prepare_chunk可能返回的错误。

AI Predicted 4.4 Difficulty: Hard EPSS 0.23% · P13

Possible ATT&CK Techniques 2 AI

T1079 T1499 · Endpoint Denial of Service

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux 2ba466d74ed74f073257f86e61519cb8f8f46184< b38c6c260c2415c7f0968871305e7a093daabb4c affected
2ba466d74ed74f073257f86e61519cb8f8f46184< f70bd2d8ca454e0ed78970f72147ca321dbaa015 affected
2ba466d74ed74f073257f86e61519cb8f8f46184< 607dc724b162f4452dc768865e578c1a509a1c8c affected
2ba466d74ed74f073257f86e61519cb8f8f46184< 1ee2d454baa361d2964e3e2f2cca9ee3f769d93c affected
2ba466d74ed74f073257f86e61519cb8f8f46184< 7891ac3b0a5c56f7148af507306308ab841cdc31 affected
2ba466d74ed74f073257f86e61519cb8f8f46184< eddd3176b8c4c83a46ab974574cda7c3dfe09388 affected
2ba466d74ed74f073257f86e61519cb8f8f46184< 481136234dfe96c7f92770829bec6111c7c5f5dd affected
2ba466d74ed74f073257f86e61519cb8f8f46184< ee70999a988b8abc3490609142f50ebaa8344432 affected
… +10 more rows
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I. Basic Information for CVE-2025-21721

Vulnerability Information
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Vulnerability Title
nilfs2: handle errors that nilfs_prepare_chunk() may return
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: nilfs2: handle errors that nilfs_prepare_chunk() may return Patch series "nilfs2: fix issues with rename operations". This series fixes BUG_ON check failures reported by syzbot around rename operations, and a minor behavioral issue where the mtime of a child directory changes when it is renamed instead of moved. This patch (of 2): The directory manipulation routines nilfs_set_link() and nilfs_delete_entry() rewrite the directory entry in the folio/page previously read by nilfs_find_entry(), so error handling is omitted on the assumption that nilfs_prepare_chunk(), which prepares the buffer for rewriting, will always succeed for these. And if an error is returned, it triggers the legacy BUG_ON() checks in each routine. This assumption is wrong, as proven by syzbot: the buffer layer called by nilfs_prepare_chunk() may call nilfs_get_block() if necessary, which may fail due to metadata corruption or other reasons. This has been there all along, but improved sanity checks and error handling may have made it more reproducible in fuzzing tests. Fix this issue by adding missing error paths in nilfs_set_link(), nilfs_delete_entry(), and their caller nilfs_rename().
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nilfs2未处理nilfs_prepare_chunk可能返回的错误。
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 ~ b38c6c260c2415c7f0968871305e7a093daabb4c -
Linux Linux 2.6.30 -

II. Public POCs for CVE-2025-21721

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III. Intelligence Information for CVE-2025-21721

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Patches & Fixes for CVE-2025-21721 (4)

Other References for CVE-2025-21721 (4)

Same Patch Batch · Linux · 2025-02-27 · 177 CVEs total

CVE-2025-21796 9.8 CRITICAL nfsd: clear acl_access/acl_default after releasing them
CVE-2025-21805 9.8 CRITICAL RDMA/rtrs: Add missing deinit() call
CVE-2025-21707 9.8 CRITICAL mptcp: consolidate suboption status
CVE-2025-21748 9.8 CRITICAL ksmbd: fix integer overflows on 32 bit systems
CVE-2024-58006 9.6 CRITICAL PCI: dwc: ep: Prevent changing BAR size/flags in pci_epc_set_bar()
CVE-2025-21735 8.8 HIGH NFC: nci: Add bounds checking in nci_hci_create_pipe()
CVE-2024-57999 8.8 HIGH powerpc/pseries/iommu: IOMMU incorrectly marks MMIO range in DDW
CVE-2024-57997 8.8 HIGH wifi: wcn36xx: fix channel survey memory allocation size
CVE-2024-57995 8.8 HIGH wifi: ath12k: fix read pointer after free in ath12k_mac_assign_vif_to_vdev()
CVE-2025-21710 8.2 HIGH tcp: correct handling of extreme memory squeeze
CVE-2024-57973 8.1 HIGH rdma/cxgb4: Prevent potential integer overflow on 32bit
CVE-2025-21760 8.1 HIGH ndisc: extend RCU protection in ndisc_send_skb()
CVE-2025-21766 8.1 HIGH ipv4: use RCU protection in __ip_rt_update_pmtu()
CVE-2025-21765 8.1 HIGH ipv6: use RCU protection in ip6_default_advmss()
CVE-2025-21762 8.1 HIGH arp: use RCU protection in arp_xmit()
CVE-2025-21772 7.8 HIGH partitions: mac: fix handling of bogus partition table
CVE-2025-21730 7.8 HIGH wifi: rtw89: avoid to init mgnt_entry list twice when WoWLAN failed
CVE-2025-21729 7.8 HIGH wifi: rtw89: fix race between cancel_hw_scan and hw_scan completion
CVE-2024-58002 7.8 HIGH media: uvcvideo: Remove dangling pointers
CVE-2024-52560 7.8 HIGH fs/ntfs3: Mark inode as bad as soon as error detected in mi_enum_attr()

Showing top 20 of 177 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2025-21721

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