CVE-2023-53360 (GCVE-0-2023-53360)
Vulnerability from cvelistv5 – Published: 2025-09-17 14:56 – Updated: 2026-08-05 09:13
VLAI
EPSS
VEX
Title
NFSv4.2: Rework scratch handling for READ_PLUS (again)
Summary
In the Linux kernel, the following vulnerability has been resolved:
NFSv4.2: Rework scratch handling for READ_PLUS (again)
I found that the read code might send multiple requests using the same
nfs_pgio_header, but nfs4_proc_read_setup() is only called once. This is
how we ended up occasionally double-freeing the scratch buffer, but also
means we set a NULL pointer but non-zero length to the xdr scratch
buffer. This results in an oops the first time decoding needs to copy
something to scratch, which frequently happens when decoding READ_PLUS
hole segments.
I fix this by moving scratch handling into the pageio read code. I
provide a function to allocate scratch space for decoding read replies,
and free the scratch buffer when the nfs_pgio_header is freed.
Severity
9.8 (Critical)
5.5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-01-14 18:43 UTC
CWE
- CWE-415 - Double Free
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Linux | Linux |
Affected:
886959f425b6a936a30b82a297ae3aecb3b8230f , < adac9f0ddd2b291c7ce41f549fdb27a13616cff5
(git)
Affected: fbd2a05f29a95d5b42b294bf47e55a711424965b , < a2f4cb206bd94b3f4a7bb05fcdce9525283b5681 (git) Affected: fbd2a05f29a95d5b42b294bf47e55a711424965b , < ae5d5672f1db711e91db6f52df5cb16ecd8f5692 (git) Affected: fbd2a05f29a95d5b42b294bf47e55a711424965b , < 303a78052091c81e9003915c521fdca1c7e117af (git) |
guessed | |
| Linux | Linux |
Affected:
6.4
Unaffected: 0 , < 6.4 (semver) Unaffected: 6.4.16 , ≤ 6.4.* (semver) Unaffected: 6.5.3 , ≤ 6.5.* (semver) Unaffected: 6.6 , ≤ * (original_commit_for_fix) |
guessed |
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},
"vulnrichment": {
"containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"cvssV3_1\": {\"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\"}}, {\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2023-53360\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-01-14T18:43:57.674879Z\"}}}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-415\", \"description\": \"CWE-415 Double Free\"}]}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-01-14T18:43:53.394Z\"}}], \"cna\": {\"title\": \"NFSv4.2: Rework scratch handling for READ_PLUS (again)\", \"metrics\": [{\"cvssV3_1\": {\"version\": \"3.1\", \"baseScore\": 9.8, \"baseSeverity\": \"CRITICAL\", \"vectorString\": \"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H\"}}], \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"886959f425b6a936a30b82a297ae3aecb3b8230f\", \"lessThan\": \"adac9f0ddd2b291c7ce41f549fdb27a13616cff5\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"fbd2a05f29a95d5b42b294bf47e55a711424965b\", \"lessThan\": \"a2f4cb206bd94b3f4a7bb05fcdce9525283b5681\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"fbd2a05f29a95d5b42b294bf47e55a711424965b\", \"lessThan\": \"ae5d5672f1db711e91db6f52df5cb16ecd8f5692\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"fbd2a05f29a95d5b42b294bf47e55a711424965b\", \"lessThan\": \"303a78052091c81e9003915c521fdca1c7e117af\", \"versionType\": \"git\"}], \"programFiles\": [\"fs/nfs/internal.h\", \"fs/nfs/nfs42.h\", \"fs/nfs/nfs42xdr.c\", \"fs/nfs/nfs4proc.c\", \"fs/nfs/read.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"6.4\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"6.4\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"6.4.16\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.4.*\"}, {\"status\": \"unaffected\", \"version\": \"6.5.3\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.5.*\"}, {\"status\": \"unaffected\", \"version\": \"6.6\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"fs/nfs/internal.h\", \"fs/nfs/nfs42.h\", \"fs/nfs/nfs42xdr.c\", \"fs/nfs/nfs4proc.c\", \"fs/nfs/read.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/adac9f0ddd2b291c7ce41f549fdb27a13616cff5\"}, {\"url\": \"https://git.kernel.org/stable/c/a2f4cb206bd94b3f4a7bb05fcdce9525283b5681\"}, {\"url\": \"https://git.kernel.org/stable/c/ae5d5672f1db711e91db6f52df5cb16ecd8f5692\"}, {\"url\": \"https://git.kernel.org/stable/c/303a78052091c81e9003915c521fdca1c7e117af\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nNFSv4.2: Rework scratch handling for READ_PLUS (again)\\n\\nI found that the read code might send multiple requests using the same\\nnfs_pgio_header, but nfs4_proc_read_setup() is only called once. This is\\nhow we ended up occasionally double-freeing the scratch buffer, but also\\nmeans we set a NULL pointer but non-zero length to the xdr scratch\\nbuffer. This results in an oops the first time decoding needs to copy\\nsomething to scratch, which frequently happens when decoding READ_PLUS\\nhole segments.\\n\\nI fix this by moving scratch handling into the pageio read code. I\\nprovide a function to allocate scratch space for decoding read replies,\\nand free the scratch buffer when the nfs_pgio_header is freed.\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.4.16\", \"versionStartIncluding\": \"6.4\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.5.3\", \"versionStartIncluding\": \"6.4\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.6\", \"versionStartIncluding\": \"6.4\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2026-08-04T09:14:19.615Z\"}}}",
"cveMetadata": "{\"cveId\": \"CVE-2023-53360\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-08-04T09:14:19.615Z\", \"dateReserved\": \"2025-09-17T14:54:09.733Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2025-09-17T14:56:50.287Z\", \"assignerShortName\": \"Linux\"}",
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
}
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
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.
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.
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