CVE-2023-53662

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.

CVSS v3 5.5 MEDIUM

5.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 1.8 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://git.kernel.org/stable/c/1fb3f1bbfdb511034b0360dbeb0f6a8424ed2a5c	Patch
https://git.kernel.org/stable/c/36daf050be3f6f067631dc52054de2d3b7cc849f	Patch
https://git.kernel.org/stable/c/7ca4b085f430f3774c3838b3da569ceccd6a0177	Patch
https://git.kernel.org/stable/c/98fc9c2cc45cfcb56961a73de3ec69b474063fc0

Configurations

Configuration 1 (hide)

OR	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::

History

28 Oct 2026, 20:10

Type	Values Removed	Values Added
Summary		(es) En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta: ext4: corrige fugas de memoria en ext4_fname_{setup_filename,prepare_lookup} Si el plegado de mayúsculas y minúsculas del nombre de archivo falla, estaremos fugando memoria de la estructura fscrypt_name, específicamente del miembro ’crypto_buf.name’. Asegurémonos de liberarla en la ruta de error en ambas funciones ext4_fname_setup_filename() y ext4_fname_prepare_lookup().

Information

Published : 2025-10-07 16:15

Updated : 2026-10-28 20:10

NVD link : CVE-2023-53662

Mitre link : CVE-2023-53662

CVE.ORG link : CVE-2023-53662

JSON object : View

Products Affected

linux

linux_kernel

CWE

CWE-401

Missing Release of Memory after Effective Lifetime

{"id": "CVE-2023-53662", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.5, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 1.8}]}, "affected": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "affectedData": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "1ae98e295fa2577fb5e492200c58d10230e00e99", "lessThan": "98fc9c2cc45cfcb56961a73de3ec69b474063fc0", "versionType": "git"}, {"status": "affected", "version": "1ae98e295fa2577fb5e492200c58d10230e00e99", "lessThan": "1fb3f1bbfdb511034b0360dbeb0f6a8424ed2a5c", "versionType": "git"}, {"status": "affected", "version": "1ae98e295fa2577fb5e492200c58d10230e00e99", "lessThan": "36daf050be3f6f067631dc52054de2d3b7cc849f", "versionType": "git"}, {"status": "affected", "version": "1ae98e295fa2577fb5e492200c58d10230e00e99", "lessThan": "7ca4b085f430f3774c3838b3da569ceccd6a0177", "versionType": "git"}], "programFiles": ["fs/ext4/crypto.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "5.13"}, {"status": "unaffected", "version": "0", "lessThan": "5.13", "versionType": "semver"}, {"status": "unaffected", "version": "5.15.199", "versionType": "semver", "lessThanOrEqual": "5.15.*"}, {"status": "unaffected", "version": "6.1.54", "versionType": "semver", "lessThanOrEqual": "6.1.*"}, {"status": "unaffected", "version": "6.5.4", "versionType": "semver", "lessThanOrEqual": "6.5.*"}, {"status": "unaffected", "version": "6.6", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["fs/ext4/crypto.c"], "defaultStatus": "affected"}]}], "published": "2025-10-07T16:15:49.927", "references": [{"url": "https://git.kernel.org/stable/c/1fb3f1bbfdb511034b0360dbeb0f6a8424ed2a5c", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/36daf050be3f6f067631dc52054de2d3b7cc849f", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/7ca4b085f430f3774c3838b3da569ceccd6a0177", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/98fc9c2cc45cfcb56961a73de3ec69b474063fc0", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "vulnStatus": "Modified", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-401"}]}], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\next4: fix memory leaks in ext4_fname_{setup_filename,prepare_lookup}\n\nIf the filename casefolding fails, we'll be leaking memory from the\nfscrypt_name struct, namely from the 'crypto_buf.name' member.\n\nMake sure we free it in the error path on both ext4_fname_setup_filename()\nand ext4_fname_prepare_lookup() functions."}, {"lang": "es", "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\next4: corrige fugas de memoria en ext4_fname_{setup_filename,prepare_lookup}\n\nSi el plegado de may\u00fasculas y min\u00fasculas del nombre de archivo falla, estaremos fugando memoria de la estructura fscrypt_name, espec\u00edficamente del miembro \u2019crypto_buf.name\u2019.\n\nAsegur\u00e9monos de liberarla en la ruta de error en ambas funciones ext4_fname_setup_filename() y ext4_fname_prepare_lookup()."}], "lastModified": "2026-10-28T20:10:00.163", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "61D73F77-2E13-4DD9-9F33-30DDB2CAE391", "versionEndExcluding": "6.1.54", "versionStartIncluding": "5.13"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "CA8C8B88-AF36-445D-A228-AD78F3615373", "versionEndExcluding": "6.5.4", "versionStartIncluding": "6.2"}], "operator": "OR"}]}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}