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CVE-2023-53662— ext4: fix memory leaks in ext4_fname_{setup_filename,prepare_lookup}

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，该漏洞源于文件名大小写转换失败时未释放内存，可能导致内存泄漏。

AI Predicted 5.5 Difficulty: Easy EPSS 0.16% · P4

Affected Version Matrix 10

VendorProduct Version RangeStatus
Linux Linux 1ae98e295fa2577fb5e492200c58d10230e00e99< 98fc9c2cc45cfcb56961a73de3ec69b474063fc0 affected
1ae98e295fa2577fb5e492200c58d10230e00e99< 1fb3f1bbfdb511034b0360dbeb0f6a8424ed2a5c affected
1ae98e295fa2577fb5e492200c58d10230e00e99< 36daf050be3f6f067631dc52054de2d3b7cc849f affected
1ae98e295fa2577fb5e492200c58d10230e00e99< 7ca4b085f430f3774c3838b3da569ceccd6a0177 affected
5.13 affected
< 5.13 unaffected
5.15.199≤ 5.15.* unaffected
6.1.54≤ 6.1.* unaffected
… +2 more rows
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I. Basic Information for CVE-2023-53662

Vulnerability Information
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Vulnerability Title
ext4: fix memory leaks in ext4_fname_{setup_filename,prepare_lookup}
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: ext4: fix memory leaks in ext4_fname_{setup_filename,prepare_lookup} If the filename casefolding fails, we'll be leaking memory from the fscrypt_name struct, namely from the 'crypto_buf.name' member. Make sure we free it in the error path on both ext4_fname_setup_filename() and ext4_fname_prepare_lookup() functions.
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，该漏洞源于文件名大小写转换失败时未释放内存，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 1ae98e295fa2577fb5e492200c58d10230e00e99 ~ 98fc9c2cc45cfcb56961a73de3ec69b474063fc0 -
Linux Linux 5.13 -

II. Public POCs for CVE-2023-53662

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III. Intelligence Information for CVE-2023-53662

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Patches & Fixes for CVE-2023-53662 (1)

Same Patch Batch · Linux · 2025-10-07 · 118 CVEs total

CVE-2023-53629 9.8 CRITICAL fs: dlm: fix use after free in midcomms commit
CVE-2023-53673 8.8 HIGH Bluetooth: hci_event: call disconnect callback before deleting conn
CVE-2023-53675 8.8 HIGH scsi: ses: Fix possible desc_ptr out-of-bounds accesses
CVE-2023-53676 8.8 HIGH scsi: target: iscsi: Fix buffer overflow in lio_target_nacl_info_show()
CVE-2023-53630 8.8 HIGH iommufd: Fix unpinning of pages when an access is present
CVE-2023-53679 8.3 HIGH wifi: mt7601u: fix an integer underflow
CVE-2023-53635 8.2 HIGH netfilter: conntrack: fix wrong ct->timeout value
CVE-2022-50528 7.8 HIGH drm/amdkfd: Fix memory leakage
CVE-2023-53659 7.8 HIGH iavf: Fix out-of-bounds when setting channels on remove
CVE-2023-53660 7.8 HIGH bpf, cpumap: Handle skb as well when clean up ptr_ring
CVE-2023-53619 7.8 HIGH netfilter: conntrack: Avoid nf_ct_helper_hash uses after free
CVE-2023-53643 7.8 HIGH nvme-tcp: don't access released socket during error recovery
CVE-2023-53645 7.8 HIGH bpf: Make bpf_refcount_acquire fallible for non-owning refs
CVE-2023-53646 7.8 HIGH drm/i915/perf: add sentinel to xehp_oa_b_counters
CVE-2023-53669 7.8 HIGH tcp: fix skb_copy_ubufs() vs BIG TCP
CVE-2023-53626 7.8 HIGH ext4: fix possible double unlock when moving a directory
CVE-2023-53627 7.8 HIGH scsi: hisi_sas: Grab sas_dev lock when traversing the members of sas_dev.list
CVE-2022-50517 7.8 HIGH mm/huge_memory: do not clobber swp_entry_t during THP split
CVE-2022-50518 7.8 HIGH parisc: Fix locking in pdc_iodc_print() firmware call
CVE-2022-50543 7.8 HIGH RDMA/rxe: Fix mr->map double free

Showing top 20 of 118 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2023-53662

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