CVE-2026-63967 (GCVE-0-2026-63967)
Vulnerability from cvelistv5 – Published: 2026-07-19 14:55 – Updated: 2026-07-19 14:55
VLAI
EPSS
VEX
Title
iio: imu: st_lsm6dsx: fix stack leak in tagged FIFO buffer
Summary
In the Linux kernel, the following vulnerability has been resolved:
iio: imu: st_lsm6dsx: fix stack leak in tagged FIFO buffer
The tagged FIFO path declares iio_buff on the stack with __aligned(8)
but no initializer, but there is a hole in the structure, which will
then leak to userspace as ST_LSM6DSX_SAMPLE_SIZE bytes (6) will be
copied, but the space between that and the timestamp are not
initialized.
Commit c14edb4d0bdc ("iio:imu:st_lsm6dsx Fix alignment and data leak
issues") moved the untagged FIFO path to a kzalloc'd buffer in hw->scan,
but for the tagged path it only added the alignment qualifier and not
the initializer :(
Fix this by just zero-initializing the structure on the stack.
Severity
No CVSS data available.
Assigner
References
8 references
Impacted products
2 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Linux | Linux |
Affected:
c14edb4d0bdc53f969ea84c7f384472c28b1a9f8 , < ff8d3c088b77b11782f2c3b97e37425be050e8de
(git)
Affected: c14edb4d0bdc53f969ea84c7f384472c28b1a9f8 , < fe1a7f99e72ebd2880515332b79b8c256be22aca (git) Affected: c14edb4d0bdc53f969ea84c7f384472c28b1a9f8 , < babf1943a40bb5669db57d30ca16c22504b18e07 (git) Affected: c14edb4d0bdc53f969ea84c7f384472c28b1a9f8 , < d42ac0bfb6a16617c62a59d53706579c7fadbfa6 (git) Affected: c14edb4d0bdc53f969ea84c7f384472c28b1a9f8 , < 3147b303b8c7d9f91da4b849ece33b45048f5eaf (git) Affected: c14edb4d0bdc53f969ea84c7f384472c28b1a9f8 , < e6bb3a49c5f9de870ea95e69775df785728e3366 (git) Affected: c14edb4d0bdc53f969ea84c7f384472c28b1a9f8 , < 890d0312d5f94be43eac21f5a34d3bccc60d051b (git) Affected: c14edb4d0bdc53f969ea84c7f384472c28b1a9f8 , < c9d8e9adaa63150ef7e833480b799d0bab83a276 (git) Affected: a42ca3b182ccb766666a0be1053921cba190e2de (git) Affected: 5.9.5 , < 5.10 (semver) |
guessed | |
| Linux | Linux |
Affected:
5.10
Unaffected: 0 , < 5.10 (semver) Unaffected: 5.10.259 , ≤ 5.10.* (semver) Unaffected: 5.15.210 , ≤ 5.15.* (semver) Unaffected: 6.1.176 , ≤ 6.1.* (semver) Unaffected: 6.6.143 , ≤ 6.6.* (semver) Unaffected: 6.12.93 , ≤ 6.12.* (semver) Unaffected: 6.18.35 , ≤ 6.18.* (semver) Unaffected: 7.0.12 , ≤ 7.0.* (semver) Unaffected: 7.1 , ≤ * (original_commit_for_fix) |
guessed |
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},
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"versionType": "semver"
},
{
"lessThanOrEqual": "7.0.*",
"status": "unaffected",
"version": "7.0.12",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "7.1",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
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{
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"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\niio: imu: st_lsm6dsx: fix stack leak in tagged FIFO buffer\n\nThe tagged FIFO path declares iio_buff on the stack with __aligned(8)\nbut no initializer, but there is a hole in the structure, which will\nthen leak to userspace as ST_LSM6DSX_SAMPLE_SIZE bytes (6) will be\ncopied, but the space between that and the timestamp are not\ninitialized.\n\nCommit c14edb4d0bdc (\"iio:imu:st_lsm6dsx Fix alignment and data leak\nissues\") moved the untagged FIFO path to a kzalloc\u0027d buffer in hw-\u003escan,\nbut for the tagged path it only added the alignment qualifier and not\nthe initializer :(\n\nFix this by just zero-initializing the structure on the stack."
}
],
"providerMetadata": {
"dateUpdated": "2026-07-19T14:55:54.999Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
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"url": "https://git.kernel.org/stable/c/ff8d3c088b77b11782f2c3b97e37425be050e8de"
},
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"url": "https://git.kernel.org/stable/c/fe1a7f99e72ebd2880515332b79b8c256be22aca"
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{
"url": "https://git.kernel.org/stable/c/babf1943a40bb5669db57d30ca16c22504b18e07"
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"url": "https://git.kernel.org/stable/c/d42ac0bfb6a16617c62a59d53706579c7fadbfa6"
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"url": "https://git.kernel.org/stable/c/e6bb3a49c5f9de870ea95e69775df785728e3366"
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{
"url": "https://git.kernel.org/stable/c/890d0312d5f94be43eac21f5a34d3bccc60d051b"
},
{
"url": "https://git.kernel.org/stable/c/c9d8e9adaa63150ef7e833480b799d0bab83a276"
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"cveId": "CVE-2026-63967",
"datePublished": "2026-07-19T14:55:54.999Z",
"dateReserved": "2026-07-19T07:54:57.024Z",
"dateUpdated": "2026-07-19T14:55:54.999Z",
"state": "PUBLISHED"
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"date": "2026-10-01",
"epss": "0.0022",
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]
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}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\niio: imu: st_lsm6dsx: fix stack leak in tagged FIFO buffer\n\nThe tagged FIFO path declares iio_buff on the stack with __aligned(8)\nbut no initializer, but there is a hole in the structure, which will\nthen leak to userspace as ST_LSM6DSX_SAMPLE_SIZE bytes (6) will be\ncopied, but the space between that and the timestamp are not\ninitialized.\n\nCommit c14edb4d0bdc (\"iio:imu:st_lsm6dsx Fix alignment and data leak\nissues\") moved the untagged FIFO path to a kzalloc\u0027d buffer in hw-\u003escan,\nbut for the tagged path it only added the alignment qualifier and not\nthe initializer :(\n\nFix this by just zero-initializing the structure on the stack."
}
],
"id": "CVE-2026-63967",
"lastModified": "2026-07-30T14:51:11.223",
"metrics": {},
"published": "2026-07-19T16:17:15.700",
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"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"vulnStatus": "Awaiting Analysis"
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},
"redhat_vex": {
"aggregate_severity": "None",
"current_release_date": "2026-08-07T13:50:24+00:00",
"cve": "CVE-2026-63967",
"id": "CVE-2026-63967",
"initial_release_date": "2026-07-19T00:00:00+00:00",
"product_status:known_not_affected": "274",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "kernel: iio: imu: st_lsm6dsx: fix stack leak in tagged FIFO buffer",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-63967.json",
"version": "3"
},
"suse_vex": {
"aggregate_severity": "moderate",
"current_release_date": "2026-10-01T00:47:16Z",
"cve": "CVE-2026-63967",
"id": "CVE-2026-63967",
"initial_release_date": "2026-07-21T13:02:33Z",
"product_status:known_affected": "530",
"product_status:known_not_affected": "193",
"product_status:recommended": "250",
"source": "SUSE CSAF VEX",
"status": "interim",
"title": "SUSE CVE CVE-2026-63967",
"url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-63967.json",
"version": "12"
}
}
}
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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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