CVE-2026-93073 (GCVE-0-2026-93073)
Vulnerability from cvelistv5 – Published: 2026-09-17 16:10 – Updated: 2026-09-17 16:10
VLAI
EPSS
VEX
Title
dax: read holder_ops once in dax_holder_notify_failure()
Summary
In the Linux kernel, the following vulnerability has been resolved:
dax: read holder_ops once in dax_holder_notify_failure()
dax_holder_notify_failure() reads dax_dev->holder_ops twice without
READ_ONCE() -- once for the NULL check and once for the indirect
notify_failure() call. A concurrent fs_put_dax() can clear holder_ops
between the two reads, so the check can observe a non-NULL pointer while
the call dereferences NULL. (kill_dax() also clears holder_ops, but only
after synchronize_srcu(), so it cannot race a reader that is inside
dax_read_lock(); fs_put_dax() does no such synchronization.)
Fetch holder_ops once into a local with READ_ONCE() so the NULL check and
the indirect call observe the same value.
Severity
No CVSS data available.
Assigner
References
6 references
Impacted products
2 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Linux | Linux |
Affected:
8012b866085523758780850087102421dbcce522 , < 1661b9bf78def01a8c96409569772d9b2592f4ba
(git)
Affected: 8012b866085523758780850087102421dbcce522 , < 0a42180d5410c98829ee72d1d426fb7faf9e6873 (git) Affected: 8012b866085523758780850087102421dbcce522 , < ee1251621d1c7cf3155c6704542cbb358d799968 (git) Affected: 8012b866085523758780850087102421dbcce522 , < 6a37acecc7c29136235cbc446a1b89e81414344b (git) Affected: 8012b866085523758780850087102421dbcce522 , < eb412f80311fc7ab6eb3203091a3fe59a5e9fd30 (git) Affected: 8012b866085523758780850087102421dbcce522 , < 7ae9d15bdcde0f2955ae13b6a95587f9e23b2359 (git) |
guessed | |
| Linux | Linux |
Affected:
6.0
Unaffected: 0 , < 6.0 (semver) Unaffected: 6.1.188 , ≤ 6.1.* (semver) Unaffected: 6.6.157 , ≤ 6.6.* (semver) Unaffected: 6.12.110 , ≤ 6.12.* (semver) Unaffected: 6.18.52 , ≤ 6.18.* (semver) Unaffected: 7.2.6 , ≤ 7.2.* (semver) Unaffected: 7.3-rc1 , ≤ * (original_commit_for_fix) |
guessed |
{
"containers": {
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"product": "Linux",
"programFiles": [
"drivers/dax/super.c"
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"versionType": "git"
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{
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},
{
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"product": "Linux",
"programFiles": [
"drivers/dax/super.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "6.0"
},
{
"lessThan": "6.0",
"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
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"status": "unaffected",
"version": "6.1.188",
"versionType": "semver"
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{
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"status": "unaffected",
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"versionType": "semver"
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{
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"version": "6.12.110",
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},
{
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"version": "6.18.52",
"versionType": "semver"
},
{
"lessThanOrEqual": "7.2.*",
"status": "unaffected",
"version": "7.2.6",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "7.3-rc1",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.1.188",
"versionStartIncluding": "6.0",
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},
{
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{
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},
{
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}
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"descriptions": [
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndax: read holder_ops once in dax_holder_notify_failure()\n\ndax_holder_notify_failure() reads dax_dev-\u003eholder_ops twice without\nREAD_ONCE() -- once for the NULL check and once for the indirect\nnotify_failure() call. A concurrent fs_put_dax() can clear holder_ops\nbetween the two reads, so the check can observe a non-NULL pointer while\nthe call dereferences NULL. (kill_dax() also clears holder_ops, but only\nafter synchronize_srcu(), so it cannot race a reader that is inside\ndax_read_lock(); fs_put_dax() does no such synchronization.)\n\nFetch holder_ops once into a local with READ_ONCE() so the NULL check and\nthe indirect call observe the same value."
}
],
"providerMetadata": {
"dateUpdated": "2026-09-17T16:10:56.405Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/1661b9bf78def01a8c96409569772d9b2592f4ba"
},
{
"url": "https://git.kernel.org/stable/c/0a42180d5410c98829ee72d1d426fb7faf9e6873"
},
{
"url": "https://git.kernel.org/stable/c/ee1251621d1c7cf3155c6704542cbb358d799968"
},
{
"url": "https://git.kernel.org/stable/c/6a37acecc7c29136235cbc446a1b89e81414344b"
},
{
"url": "https://git.kernel.org/stable/c/eb412f80311fc7ab6eb3203091a3fe59a5e9fd30"
},
{
"url": "https://git.kernel.org/stable/c/7ae9d15bdcde0f2955ae13b6a95587f9e23b2359"
}
],
"title": "dax: read holder_ops once in dax_holder_notify_failure()",
"x_generator": {
"engine": "bippy-1.2.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2026-93073",
"datePublished": "2026-09-17T16:10:56.405Z",
"dateReserved": "2026-09-17T15:57:05.661Z",
"dateUpdated": "2026-09-17T16:10:56.405Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
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"versionType": "semver"
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{
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{
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"version": "7.3-rc1",
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"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndax: read holder_ops once in dax_holder_notify_failure()\n\ndax_holder_notify_failure() reads dax_dev-\u003eholder_ops twice without\nREAD_ONCE() -- once for the NULL check and once for the indirect\nnotify_failure() call. A concurrent fs_put_dax() can clear holder_ops\nbetween the two reads, so the check can observe a non-NULL pointer while\nthe call dereferences NULL. (kill_dax() also clears holder_ops, but only\nafter synchronize_srcu(), so it cannot race a reader that is inside\ndax_read_lock(); fs_put_dax() does no such synchronization.)\n\nFetch holder_ops once into a local with READ_ONCE() so the NULL check and\nthe indirect call observe the same value."
}
],
"id": "CVE-2026-93073",
"lastModified": "2026-09-17T17:18:01.207",
"metrics": {},
"published": "2026-09-17T17:18:01.207",
"references": [
{
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"url": "https://git.kernel.org/stable/c/0a42180d5410c98829ee72d1d426fb7faf9e6873"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/1661b9bf78def01a8c96409569772d9b2592f4ba"
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{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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{
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{
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{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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],
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"vulnStatus": "Received"
}
},
"suse_vex": {
"aggregate_severity": "not set",
"current_release_date": "2026-09-18T00:12:41Z",
"cve": "CVE-2026-93073",
"id": "CVE-2026-93073",
"initial_release_date": "2026-09-18T00:12:41Z",
"source": "SUSE CSAF VEX",
"status": "interim",
"title": "SUSE CVE CVE-2026-93073",
"url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-93073.json",
"version": "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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