FKIE_CVE-2023-54050
Vulnerability from fkie_nvd - Published: 2025-12-24 13:16 - Updated: 2026-08-04 10:19
Severity
Summary
In the Linux kernel, the following vulnerability has been resolved:
ubifs: Fix memleak when insert_old_idx() failed
Following process will cause a memleak for copied up znode:
dirty_cow_znode
zn = copy_znode(c, znode);
err = insert_old_idx(c, zbr->lnum, zbr->offs);
if (unlikely(err))
return ERR_PTR(err); // No one refers to zn.
Fetch a reproducer in [Link].
Function copy_znode() is split into 2 parts: resource allocation
and znode replacement, insert_old_idx() is split in similar way,
so resource cleanup could be done in error handling path without
corrupting metadata(mem & disk).
It's okay that old index inserting is put behind of add_idx_dirt(),
old index is used in layout_leb_in_gaps(), so the two processes do
not depend on each other.
References
Impacted products
| Vendor | Product | Version |
|---|
{
"affected": [
{
"affectedData": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"fs/ubifs/tnc.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"lessThan": "cc29c7216d7f057eb0613b97dc38c7e1962a88d2",
"status": "affected",
"version": "1e51764a3c2ac05a23a22b2a95ddee4d9bffb16d",
"versionType": "git"
},
{
"lessThan": "6f2eee5457bc48b0426dedfd78cdbdea241a6edb",
"status": "affected",
"version": "1e51764a3c2ac05a23a22b2a95ddee4d9bffb16d",
"versionType": "git"
},
{
"lessThan": "66e9f2fb3e753f820bec2a98e8c6387029988320",
"status": "affected",
"version": "1e51764a3c2ac05a23a22b2a95ddee4d9bffb16d",
"versionType": "git"
},
{
"lessThan": "3ae75f82c33fa1b4ca2006b55c84f4ef4a428d4d",
"status": "affected",
"version": "1e51764a3c2ac05a23a22b2a95ddee4d9bffb16d",
"versionType": "git"
},
{
"lessThan": "ef9aac603659e9ffe7d69ae16e3f0fc0991a965b",
"status": "affected",
"version": "1e51764a3c2ac05a23a22b2a95ddee4d9bffb16d",
"versionType": "git"
},
{
"lessThan": "79079cebbeed624b9d01cfcf1e3254ae1a1f6e14",
"status": "affected",
"version": "1e51764a3c2ac05a23a22b2a95ddee4d9bffb16d",
"versionType": "git"
},
{
"lessThan": "a6da0ab9847779e05a7416c7a98148b549de69ef",
"status": "affected",
"version": "1e51764a3c2ac05a23a22b2a95ddee4d9bffb16d",
"versionType": "git"
},
{
"lessThan": "b5fda08ef213352ac2df7447611eb4d383cce929",
"status": "affected",
"version": "1e51764a3c2ac05a23a22b2a95ddee4d9bffb16d",
"versionType": "git"
}
]
},
{
"defaultStatus": "affected",
"product": "Linux",
"programFiles": [
"fs/ubifs/tnc.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "2.6.27"
},
{
"lessThan": "2.6.27",
"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "4.19.*",
"status": "unaffected",
"version": "4.19.283",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.4.*",
"status": "unaffected",
"version": "5.4.243",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.10.*",
"status": "unaffected",
"version": "5.10.180",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"version": "5.15.111",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"version": "6.1.28",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.2.*",
"status": "unaffected",
"version": "6.2.15",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.3.*",
"status": "unaffected",
"version": "6.3.2",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "6.4",
"versionType": "original_commit_for_fix"
}
]
}
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nubifs: Fix memleak when insert_old_idx() failed\n\nFollowing process will cause a memleak for copied up znode:\n\ndirty_cow_znode\n zn = copy_znode(c, znode);\n err = insert_old_idx(c, zbr-\u003elnum, zbr-\u003eoffs);\n if (unlikely(err))\n return ERR_PTR(err); // No one refers to zn.\n\nFetch a reproducer in [Link].\n\nFunction copy_znode() is split into 2 parts: resource allocation\nand znode replacement, insert_old_idx() is split in similar way,\nso resource cleanup could be done in error handling path without\ncorrupting metadata(mem \u0026 disk).\nIt\u0027s okay that old index inserting is put behind of add_idx_dirt(),\nold index is used in layout_leb_in_gaps(), so the two processes do\nnot depend on each other."
}
],
"id": "CVE-2023-54050",
"lastModified": "2026-08-04T10:19:26.553",
"metrics": {
"cvssMetricV31": [
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 7.8,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
"exploitabilityScore": 1.8,
"impactScore": 5.9,
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"type": "Secondary"
}
]
},
"published": "2025-12-24T13:16:06.670",
"references": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/3ae75f82c33fa1b4ca2006b55c84f4ef4a428d4d"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/66e9f2fb3e753f820bec2a98e8c6387029988320"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/6f2eee5457bc48b0426dedfd78cdbdea241a6edb"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/79079cebbeed624b9d01cfcf1e3254ae1a1f6e14"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/a6da0ab9847779e05a7416c7a98148b549de69ef"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/b5fda08ef213352ac2df7447611eb4d383cce929"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/cc29c7216d7f057eb0613b97dc38c7e1962a88d2"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/ef9aac603659e9ffe7d69ae16e3f0fc0991a965b"
}
],
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"vulnStatus": "Deferred"
}
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Sightings
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Nomenclature
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The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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