CVE-2022-49408 (GCVE-0-2022-49408)
Vulnerability from cvelistv5
Published
2025-02-26 02:12
Modified
2025-05-04 08:37
Severity ?
VLAI Severity ?
EPSS score ?
Summary
In the Linux kernel, the following vulnerability has been resolved:
ext4: fix memory leak in parse_apply_sb_mount_options()
If processing the on-disk mount options fails after any memory was
allocated in the ext4_fs_context, e.g. s_qf_names, then this memory is
leaked. Fix this by calling ext4_fc_free() instead of kfree() directly.
Reproducer:
mkfs.ext4 -F /dev/vdc
tune2fs /dev/vdc -E mount_opts=usrjquota=file
echo clear > /sys/kernel/debug/kmemleak
mount /dev/vdc /vdc
echo scan > /sys/kernel/debug/kmemleak
sleep 5
echo scan > /sys/kernel/debug/kmemleak
cat /sys/kernel/debug/kmemleak
References
Impacted products
{
"containers": {
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"fs/ext4/super.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"lessThan": "9ea3e6168948189cec31d0678d2b55b395f88491",
"status": "affected",
"version": "7edfd85b1ffd36593011dec96ab395912a340418",
"versionType": "git"
},
{
"lessThan": "f92ded66e9d0aa20b883a2a5183973abc8f41815",
"status": "affected",
"version": "7edfd85b1ffd36593011dec96ab395912a340418",
"versionType": "git"
},
{
"lessThan": "c069db76ed7b681c69159f44be96d2137e9ca989",
"status": "affected",
"version": "7edfd85b1ffd36593011dec96ab395912a340418",
"versionType": "git"
}
]
},
{
"defaultStatus": "affected",
"product": "Linux",
"programFiles": [
"fs/ext4/super.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "5.17"
},
{
"lessThan": "5.17",
"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.17.*",
"status": "unaffected",
"version": "5.17.14",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.18.*",
"status": "unaffected",
"version": "5.18.3",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "5.19",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "5.17.14",
"versionStartIncluding": "5.17",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "5.18.3",
"versionStartIncluding": "5.17",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "5.19",
"versionStartIncluding": "5.17",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\next4: fix memory leak in parse_apply_sb_mount_options()\n\nIf processing the on-disk mount options fails after any memory was\nallocated in the ext4_fs_context, e.g. s_qf_names, then this memory is\nleaked. Fix this by calling ext4_fc_free() instead of kfree() directly.\n\nReproducer:\n\n mkfs.ext4 -F /dev/vdc\n tune2fs /dev/vdc -E mount_opts=usrjquota=file\n echo clear \u003e /sys/kernel/debug/kmemleak\n mount /dev/vdc /vdc\n echo scan \u003e /sys/kernel/debug/kmemleak\n sleep 5\n echo scan \u003e /sys/kernel/debug/kmemleak\n cat /sys/kernel/debug/kmemleak"
}
],
"providerMetadata": {
"dateUpdated": "2025-05-04T08:37:02.621Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/9ea3e6168948189cec31d0678d2b55b395f88491"
},
{
"url": "https://git.kernel.org/stable/c/f92ded66e9d0aa20b883a2a5183973abc8f41815"
},
{
"url": "https://git.kernel.org/stable/c/c069db76ed7b681c69159f44be96d2137e9ca989"
}
],
"title": "ext4: fix memory leak in parse_apply_sb_mount_options()",
"x_generator": {
"engine": "bippy-1.2.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2022-49408",
"datePublished": "2025-02-26T02:12:32.048Z",
"dateReserved": "2025-02-26T02:08:31.567Z",
"dateUpdated": "2025-05-04T08:37:02.621Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.1",
"vulnerability-lookup:meta": {
"nvd": "{\"cve\":{\"id\":\"CVE-2022-49408\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-02-26T07:01:17.323\",\"lastModified\":\"2025-04-17T20:29:52.707\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\next4: fix memory leak in parse_apply_sb_mount_options()\\n\\nIf processing the on-disk mount options fails after any memory was\\nallocated in the ext4_fs_context, e.g. s_qf_names, then this memory is\\nleaked. Fix this by calling ext4_fc_free() instead of kfree() directly.\\n\\nReproducer:\\n\\n mkfs.ext4 -F /dev/vdc\\n tune2fs /dev/vdc -E mount_opts=usrjquota=file\\n echo clear \u003e /sys/kernel/debug/kmemleak\\n mount /dev/vdc /vdc\\n echo scan \u003e /sys/kernel/debug/kmemleak\\n sleep 5\\n echo scan \u003e /sys/kernel/debug/kmemleak\\n cat /sys/kernel/debug/kmemleak\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: ext4: se corrige la p\u00e9rdida de memoria en parse_apply_sb_mount_options() Si el procesamiento de las opciones de montaje en disco falla despu\u00e9s de que se haya asignado memoria en ext4_fs_context, por ejemplo, s_qf_names, entonces se produce una p\u00e9rdida de memoria. Corrija esto llamando a ext4_fc_free() en lugar de kfree() directamente. Reproductor: mkfs.ext4 -F /dev/vdc tune2fs /dev/vdc -E mount_opts=usrjquota=file echo clear \u0026gt; /sys/kernel/debug/kmemleak mount /dev/vdc /vdc echo scan \u0026gt; /sys/kernel/debug/kmemleak sleep 5 echo scan \u0026gt; /sys/kernel/debug/kmemleak cat /sys/kernel/debug/kmemleak\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":5.5,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":3.6}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-401\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.17\",\"versionEndExcluding\":\"5.17.14\",\"matchCriteriaId\":\"C48ED8B1-C02B-4764-9298-070E29EF1F88\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.18\",\"versionEndExcluding\":\"5.18.3\",\"matchCriteriaId\":\"8E122216-2E9E-4B3E-B7B8-D575A45BA3C2\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/9ea3e6168948189cec31d0678d2b55b395f88491\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/c069db76ed7b681c69159f44be96d2137e9ca989\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/f92ded66e9d0aa20b883a2a5183973abc8f41815\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]}]}}"
}
}