CVE-2023-53210 (GCVE-0-2023-53210)
Vulnerability from cvelistv5 – Published: 2025-09-15 14:21 – Updated: 2026-05-11 19:40
VLAI
EPSS
VEX
Title
md/raid5-cache: fix null-ptr-deref for r5l_flush_stripe_to_raid()
Summary
In the Linux kernel, the following vulnerability has been resolved:
md/raid5-cache: fix null-ptr-deref for r5l_flush_stripe_to_raid()
r5l_flush_stripe_to_raid() will check if the list 'flushing_ios' is
empty, and then submit 'flush_bio', however, r5l_log_flush_endio()
is clearing the list first and then clear the bio, which will cause
null-ptr-deref:
T1: submit flush io
raid5d
handle_active_stripes
r5l_flush_stripe_to_raid
// list is empty
// add 'io_end_ios' to the list
bio_init
submit_bio
// io1
T2: io1 is done
r5l_log_flush_endio
list_splice_tail_init
// clear the list
T3: submit new flush io
...
r5l_flush_stripe_to_raid
// list is empty
// add 'io_end_ios' to the list
bio_init
bio_uninit
// clear bio->bi_blkg
submit_bio
// null-ptr-deref
Fix this problem by clearing bio before clearing the list in
r5l_log_flush_endio().
Severity
5.5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-01-14 17:48 UTC
CWE
- CWE-476 - NULL Pointer Dereference
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Linux | Linux |
Affected:
0dd00cba99c352dc9afd62979f350d808c215cb9 , < 711fb92606208a8626b785da4f9f23d648a5b6c8
(git)
Affected: 0dd00cba99c352dc9afd62979f350d808c215cb9 , < 7a8b6d93991bf4b72b3f959baea35397c6c8e521 (git) Affected: 0dd00cba99c352dc9afd62979f350d808c215cb9 , < e46b2e7be8059d156af8c011dd8d665229b65886 (git) Affected: 0dd00cba99c352dc9afd62979f350d808c215cb9 , < 0d0bd28c500173bfca78aa840f8f36d261ef1765 (git) |
guessed | |
| Linux | Linux |
Affected:
5.18
Unaffected: 0 , < 5.18 (semver) Unaffected: 6.1.53 , ≤ 6.1.* (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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\"0d0bd28c500173bfca78aa840f8f36d261ef1765\", \"versionType\": \"git\"}], \"programFiles\": [\"drivers/md/raid5-cache.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"5.18\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"5.18\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"6.1.53\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.1.*\"}, {\"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\": [\"drivers/md/raid5-cache.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/711fb92606208a8626b785da4f9f23d648a5b6c8\"}, {\"url\": \"https://git.kernel.org/stable/c/7a8b6d93991bf4b72b3f959baea35397c6c8e521\"}, {\"url\": \"https://git.kernel.org/stable/c/e46b2e7be8059d156af8c011dd8d665229b65886\"}, {\"url\": \"https://git.kernel.org/stable/c/0d0bd28c500173bfca78aa840f8f36d261ef1765\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nmd/raid5-cache: fix null-ptr-deref for r5l_flush_stripe_to_raid()\\n\\nr5l_flush_stripe_to_raid() will check if the list \u0027flushing_ios\u0027 is\\nempty, and then submit \u0027flush_bio\u0027, however, r5l_log_flush_endio()\\nis clearing the list first and then clear the bio, which will cause\\nnull-ptr-deref:\\n\\nT1: submit flush io\\nraid5d\\n handle_active_stripes\\n r5l_flush_stripe_to_raid\\n // list is empty\\n // add \u0027io_end_ios\u0027 to the list\\n bio_init\\n submit_bio\\n // io1\\n\\nT2: io1 is done\\nr5l_log_flush_endio\\n list_splice_tail_init\\n // clear the list\\n\\t\\t\\tT3: submit new flush io\\n\\t\\t\\t...\\n\\t\\t\\tr5l_flush_stripe_to_raid\\n\\t\\t\\t // list is empty\\n\\t\\t\\t // add \u0027io_end_ios\u0027 to the list\\n\\t\\t\\t bio_init\\n bio_uninit\\n // clear bio-\u003ebi_blkg\\n\\t\\t\\t submit_bio\\n\\t\\t\\t // null-ptr-deref\\n\\nFix this problem by clearing bio before clearing the list in\\nr5l_log_flush_endio().\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.1.53\", \"versionStartIncluding\": \"5.18\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.4.16\", \"versionStartIncluding\": \"5.18\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.5.3\", \"versionStartIncluding\": \"5.18\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.6\", \"versionStartIncluding\": \"5.18\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2026-05-11T19:40:24.649Z\"}}}",
"cveMetadata": "{\"cveId\": \"CVE-2023-53210\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-05-11T19:40:24.649Z\", \"dateReserved\": \"2025-09-15T13:59:19.069Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2025-09-15T14:21:38.534Z\", \"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.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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