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CVE-2023-53796— f2fs: fix information leak in f2fs_move_inline_dirents()

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f2fs_move_inline_dirents函数中的信息泄漏问题。

AI Predicted 5.3 Difficulty: Moderate EPSS 0.21% · P11

Possible ATT&CK Techniques 1 AI

T1005 · Data from Local System

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux 4ec17d688d74b6b7cb10043c57ff4818cde2b0ca< 4e3b4b170bd43db1d8a93a6bd0ea434b17cc86f7 affected
4ec17d688d74b6b7cb10043c57ff4818cde2b0ca< a6807ef0f3b3d8508d3b07a2e35de8a91820a014 affected
4ec17d688d74b6b7cb10043c57ff4818cde2b0ca< 2bef8314fcf94ddc27e22d03f237c0fafd00de33 affected
4ec17d688d74b6b7cb10043c57ff4818cde2b0ca< 00b5587326625d0fddb2a5f5a3d4acd950102ace affected
4ec17d688d74b6b7cb10043c57ff4818cde2b0ca< 117d4f6687b1f74423b5d398ea95c63b262a8e73 affected
4ec17d688d74b6b7cb10043c57ff4818cde2b0ca< f07a8d61b6ea81bb3cbe0638af40f8824d6147fd affected
4ec17d688d74b6b7cb10043c57ff4818cde2b0ca< eebaecef0095bb8f493c03982da75c6e7bae1056 affected
4ec17d688d74b6b7cb10043c57ff4818cde2b0ca< 9a5571cff4ffcfc24847df9fd545cc5799ac0ee5 affected
… +10 more rows
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I. Basic Information for CVE-2023-53796

Vulnerability Information
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Vulnerability Title
f2fs: fix information leak in f2fs_move_inline_dirents()
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: f2fs: fix information leak in f2fs_move_inline_dirents() When converting an inline directory to a regular one, f2fs is leaking uninitialized memory to disk because it doesn't initialize the entire directory block. Fix this by zero-initializing the block. This bug was introduced by commit 4ec17d688d74 ("f2fs: avoid unneeded initializing when converting inline dentry"), which didn't consider the security implications of leaking uninitialized memory to disk. This was found by running xfstest generic/435 on a KMSAN-enabled kernel.
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f2fs_move_inline_dirents函数中的信息泄漏问题。
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 4ec17d688d74b6b7cb10043c57ff4818cde2b0ca ~ 4e3b4b170bd43db1d8a93a6bd0ea434b17cc86f7 -
Linux Linux 4.3 -

II. Public POCs for CVE-2023-53796

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III. Intelligence Information for CVE-2023-53796

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Same Patch Batch · Linux · 2025-12-09 · 152 CVEs total

CVE-2022-50666 9.8 CRITICAL RDMA/siw: Fix QP destroy to wait for all references dropped.
CVE-2025-40343 9.8 CRITICAL nvmet-fc: avoid scheduling association deletion twice
CVE-2023-53794 9.8 CRITICAL cifs: fix session state check in reconnect to avoid use-after-free issue
CVE-2025-40342 8.8 HIGH nvme-fc: use lock accessing port_state and rport state
CVE-2023-53822 8.8 HIGH wifi: ath11k: Ignore frags from uninitialized peer in dp.
CVE-2023-53785 8.8 HIGH mt76: mt7921: don't assume adequate headroom for SDIO headers
CVE-2025-40336 8.8 HIGH drm/gpusvm: fix hmm_pfn_to_map_order() usage
CVE-2023-53827 8.8 HIGH Bluetooth: L2CAP: Fix use-after-free in l2cap_disconnect_{req,rsp}
CVE-2025-40328 8.8 HIGH smb: client: fix potential UAF in smb2_close_cached_fid()
CVE-2023-53851 8.4 HIGH drm/msm/dp: Drop aux devices together with DP controller
CVE-2025-40337 8.2 HIGH net: stmmac: Correctly handle Rx checksum offload errors
CVE-2022-50656 8.1 HIGH nfc: pn533: Clear nfc_target before being used
CVE-2023-53803 8.1 HIGH scsi: ses: Fix slab-out-of-bounds in ses_enclosure_data_process()
CVE-2023-53838 7.8 HIGH f2fs: synchronize atomic write aborts
CVE-2023-53860 7.8 HIGH dm: don't attempt to queue IO under RCU protection
CVE-2023-53829 7.8 HIGH f2fs: flush inode if atomic file is aborted
CVE-2023-53790 7.8 HIGH bpf: Zeroing allocated object from slab in bpf memory allocator
CVE-2023-53836 7.8 HIGH bpf, sockmap: Fix skb refcnt race after locking changes
CVE-2023-53844 7.8 HIGH drm/ttm: Don't leak a resource on swapout move error
CVE-2023-53846 7.8 HIGH f2fs: fix to do sanity check on direct node in truncate_dnode()

Showing top 20 of 152 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2023-53796

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