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CVE-2023-53396— ubifs: Fix memory leak in do_rename

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，该漏洞源于加密目录重命名操作中未释放fscrypt_setup_filename分配的内存，可能导致内存泄漏。

AI Predicted 5.3 Difficulty: Trivial EPSS 0.15% · P4

Affected Version Matrix 17

VendorProduct Version RangeStatus
Linux Linux c67bc98d1f0853bb196e9c48eab38b6f2ddab795< 43b2f7d690697182beed6f71aa57b7249d3cfc9c affected
278d9a243635f26c05ad95dcf9c5a593b9e04dc6< 9f565752b328fe53c9e42b7d4e4d89a1da63d738 affected
278d9a243635f26c05ad95dcf9c5a593b9e04dc6< 7e264f67b7d6580eff5c2696961039fd05c69258 affected
278d9a243635f26c05ad95dcf9c5a593b9e04dc6< 517ddc0259d7a7231486bdafde8035c478bc4088 affected
278d9a243635f26c05ad95dcf9c5a593b9e04dc6< 3a36d20e012903f45714df2731261fdefac900cb affected
17495eb2f7f08113b50aba298c2c1a045824c4f7 affected
868de33a39e0e1e91ed3ce4a23a65f30144d2443 affected
5.15.33< 5.15.112 affected
… +9 more rows
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I. Basic Information for CVE-2023-53396

Vulnerability Information
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Vulnerability Title
ubifs: Fix memory leak in do_rename
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: ubifs: Fix memory leak in do_rename If renaming a file in an encrypted directory, function fscrypt_setup_filename allocates memory for a file name. This name is never used, and before returning to the caller the memory for it is not freed. When running kmemleak on it we see that it is registered as a leak. The report below is triggered by a simple program 'rename' that renames a file in an encrypted directory: unreferenced object 0xffff888101502840 (size 32): comm "rename", pid 9404, jiffies 4302582475 (age 435.735s) backtrace: __kmem_cache_alloc_node __kmalloc fscrypt_setup_filename do_rename ubifs_rename vfs_rename do_renameat2 To fix this we can remove the call to fscrypt_setup_filename as it's not needed.
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，该漏洞源于加密目录重命名操作中未释放fscrypt_setup_filename分配的内存，可能导致内存泄漏。
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 c67bc98d1f0853bb196e9c48eab38b6f2ddab795 ~ 43b2f7d690697182beed6f71aa57b7249d3cfc9c -
Linux Linux 5.18 -

II. Public POCs for CVE-2023-53396

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III. Intelligence Information for CVE-2023-53396

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Same Patch Batch · Linux · 2025-09-18 · 121 CVEs total

CVE-2022-50410 9.8 CRITICAL NFSD: Protect against send buffer overflow in NFSv2 READ
CVE-2022-50401 9.8 CRITICAL nfsd: under NFSv4.1, fix double svc_xprt_put on rpc_create failure
CVE-2023-53382 9.8 CRITICAL net/smc: Reset connection when trying to use SMCRv2 fails.
CVE-2022-50419 8.8 HIGH Bluetooth: hci_sysfs: Fix attempting to call device_add multiple times
CVE-2022-50413 8.8 HIGH wifi: mac80211: fix use-after-free
CVE-2023-53431 8.8 HIGH scsi: ses: Handle enclosure with just a primary component gracefully
CVE-2023-53432 8.8 HIGH firewire: net: fix use after free in fwnet_finish_incoming_packet()
CVE-2023-53374 8.8 HIGH Bluetooth: hci_conn: fail SCO/ISO via hci_conn_failed if ACL gone early
CVE-2022-50386 8.8 HIGH Bluetooth: L2CAP: Fix user-after-free
CVE-2023-53372 8.2 HIGH sctp: fix a potential overflow in sctp_ifwdtsn_skip
CVE-2022-50399 7.8 HIGH media: atomisp: prevent integer overflow in sh_css_set_black_frame()
CVE-2023-53398 7.8 HIGH mlx5: fix possible ptp queue fifo use-after-free
CVE-2023-53394 7.8 HIGH net/mlx5e: xsk: Fix crash on regular rq reactivation
CVE-2022-50417 7.8 HIGH drm/panfrost: Fix GEM handle creation ref-counting
CVE-2023-53429 7.8 HIGH btrfs: don't check PageError in __extent_writepage
CVE-2023-53373 7.8 HIGH crypto: seqiv - Handle EBUSY correctly
CVE-2023-53387 7.8 HIGH scsi: ufs: core: Fix device management cmd timeout flow
CVE-2023-53378 7.8 HIGH drm/i915/dpt: Treat the DPT BO as a framebuffer
CVE-2023-53386 7.8 HIGH Bluetooth: Fix potential use-after-free when clear keys
CVE-2023-53426 7.8 HIGH xsk: Fix xsk_diag use-after-free error during socket cleanup

Showing top 20 of 121 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2023-53396

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