CVE-2026-72437 (GCVE-0-2026-72437)
Vulnerability from cvelistv5 – Published: 2026-08-15 05:56 – Updated: 2026-08-17 05:14
VLAI
EPSS
VEX
Title
md/raid1: free r1_bio when REQ_NOWAIT is set and read would block on retry
Summary
In the Linux kernel, the following vulnerability has been resolved:
md/raid1: free r1_bio when REQ_NOWAIT is set and read would block on retry
When a read is retried, raid1_read_request() may be called with a
pre-allocated r1_bio. If wait_read_barrier() fails for a REQ_NOWAIT
read, the bio is completed and the function returns immediately. In this
case the existing r1_bio is leaked.
This fixes a leak of pre-allocated r1_bio structures for retried reads.
Severity
No CVSS data available.
Assigner
References
6 references
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Linux | Linux |
Affected:
5aa705039c4fca84575539bfa2b8a28454a3d2ca , < d1eda529a4bf6b866d02755723ee0eb1f037a5ed
(git)
Affected: 5aa705039c4fca84575539bfa2b8a28454a3d2ca , < c66ed3e6371f5dba8f5d8ab810d6683ddc99201e (git) Affected: 5aa705039c4fca84575539bfa2b8a28454a3d2ca , < db58075bc9c2ad2731f9c063859b47104bc2e7ef (git) Affected: 5aa705039c4fca84575539bfa2b8a28454a3d2ca , < 6d92dbd73d19a0622f60352ce9d9379f7a760112 (git) Affected: 5aa705039c4fca84575539bfa2b8a28454a3d2ca , < c6e6354295845698d2fdfa20b71fc404786f7e93 (git) Affected: 5aa705039c4fca84575539bfa2b8a28454a3d2ca , < 69ad6ce47f9bf2b9fe0ed69b042db993d33bbf12 (git) |
|
| Linux | Linux |
Affected:
5.17
Unaffected: 0 , < 5.17 (semver) Unaffected: 6.1.178 , ≤ 6.1.* (semver) Unaffected: 6.6.145 , ≤ 6.6.* (semver) Unaffected: 6.12.97 , ≤ 6.12.* (semver) Unaffected: 6.18.40 , ≤ 6.18.* (semver) Unaffected: 7.1.5 , ≤ 7.1.* (semver) Unaffected: 7.2 , ≤ * (original_commit_for_fix) |
{
"containers": {
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"drivers/md/raid1.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"lessThan": "d1eda529a4bf6b866d02755723ee0eb1f037a5ed",
"status": "affected",
"version": "5aa705039c4fca84575539bfa2b8a28454a3d2ca",
"versionType": "git"
},
{
"lessThan": "c66ed3e6371f5dba8f5d8ab810d6683ddc99201e",
"status": "affected",
"version": "5aa705039c4fca84575539bfa2b8a28454a3d2ca",
"versionType": "git"
},
{
"lessThan": "db58075bc9c2ad2731f9c063859b47104bc2e7ef",
"status": "affected",
"version": "5aa705039c4fca84575539bfa2b8a28454a3d2ca",
"versionType": "git"
},
{
"lessThan": "6d92dbd73d19a0622f60352ce9d9379f7a760112",
"status": "affected",
"version": "5aa705039c4fca84575539bfa2b8a28454a3d2ca",
"versionType": "git"
},
{
"lessThan": "c6e6354295845698d2fdfa20b71fc404786f7e93",
"status": "affected",
"version": "5aa705039c4fca84575539bfa2b8a28454a3d2ca",
"versionType": "git"
},
{
"lessThan": "69ad6ce47f9bf2b9fe0ed69b042db993d33bbf12",
"status": "affected",
"version": "5aa705039c4fca84575539bfa2b8a28454a3d2ca",
"versionType": "git"
}
]
},
{
"defaultStatus": "affected",
"product": "Linux",
"programFiles": [
"drivers/md/raid1.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "5.17"
},
{
"lessThan": "5.17",
"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"version": "6.1.178",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"version": "6.6.145",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.12.*",
"status": "unaffected",
"version": "6.12.97",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.18.*",
"status": "unaffected",
"version": "6.18.40",
"versionType": "semver"
},
{
"lessThanOrEqual": "7.1.*",
"status": "unaffected",
"version": "7.1.5",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "7.2",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.1.178",
"versionStartIncluding": "5.17",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.6.145",
"versionStartIncluding": "5.17",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.12.97",
"versionStartIncluding": "5.17",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.18.40",
"versionStartIncluding": "5.17",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "7.1.5",
"versionStartIncluding": "5.17",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "7.2",
"versionStartIncluding": "5.17",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmd/raid1: free r1_bio when REQ_NOWAIT is set and read would block on retry\n\nWhen a read is retried, raid1_read_request() may be called with a\npre-allocated r1_bio. If wait_read_barrier() fails for a REQ_NOWAIT\nread, the bio is completed and the function returns immediately. In this\ncase the existing r1_bio is leaked.\n\nThis fixes a leak of pre-allocated r1_bio structures for retried reads."
}
],
"providerMetadata": {
"dateUpdated": "2026-08-17T05:14:37.742Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/d1eda529a4bf6b866d02755723ee0eb1f037a5ed"
},
{
"url": "https://git.kernel.org/stable/c/c66ed3e6371f5dba8f5d8ab810d6683ddc99201e"
},
{
"url": "https://git.kernel.org/stable/c/db58075bc9c2ad2731f9c063859b47104bc2e7ef"
},
{
"url": "https://git.kernel.org/stable/c/6d92dbd73d19a0622f60352ce9d9379f7a760112"
},
{
"url": "https://git.kernel.org/stable/c/c6e6354295845698d2fdfa20b71fc404786f7e93"
},
{
"url": "https://git.kernel.org/stable/c/69ad6ce47f9bf2b9fe0ed69b042db993d33bbf12"
}
],
"title": "md/raid1: free r1_bio when REQ_NOWAIT is set and read would block on retry",
"x_generator": {
"engine": "bippy-1.2.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2026-72437",
"datePublished": "2026-08-15T05:56:50.732Z",
"dateReserved": "2026-08-09T03:40:39.929Z",
"dateUpdated": "2026-08-17T05:14:37.742Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"epss": {
"cve": "CVE-2026-72437",
"date": "2026-10-02",
"epss": "0.00215",
"percentile": "0.10733"
},
"nvd": {
"cve": {
"affected": [
{
"affectedData": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"drivers/md/raid1.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"lessThan": "d1eda529a4bf6b866d02755723ee0eb1f037a5ed",
"status": "affected",
"version": "5aa705039c4fca84575539bfa2b8a28454a3d2ca",
"versionType": "git"
},
{
"lessThan": "c66ed3e6371f5dba8f5d8ab810d6683ddc99201e",
"status": "affected",
"version": "5aa705039c4fca84575539bfa2b8a28454a3d2ca",
"versionType": "git"
},
{
"lessThan": "db58075bc9c2ad2731f9c063859b47104bc2e7ef",
"status": "affected",
"version": "5aa705039c4fca84575539bfa2b8a28454a3d2ca",
"versionType": "git"
},
{
"lessThan": "6d92dbd73d19a0622f60352ce9d9379f7a760112",
"status": "affected",
"version": "5aa705039c4fca84575539bfa2b8a28454a3d2ca",
"versionType": "git"
},
{
"lessThan": "c6e6354295845698d2fdfa20b71fc404786f7e93",
"status": "affected",
"version": "5aa705039c4fca84575539bfa2b8a28454a3d2ca",
"versionType": "git"
},
{
"lessThan": "69ad6ce47f9bf2b9fe0ed69b042db993d33bbf12",
"status": "affected",
"version": "5aa705039c4fca84575539bfa2b8a28454a3d2ca",
"versionType": "git"
}
]
},
{
"defaultStatus": "affected",
"product": "Linux",
"programFiles": [
"drivers/md/raid1.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "5.17"
},
{
"lessThan": "5.17",
"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"version": "6.1.178",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"version": "6.6.145",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.12.*",
"status": "unaffected",
"version": "6.12.97",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.18.*",
"status": "unaffected",
"version": "6.18.40",
"versionType": "semver"
},
{
"lessThanOrEqual": "7.1.*",
"status": "unaffected",
"version": "7.1.5",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "7.2",
"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\nmd/raid1: free r1_bio when REQ_NOWAIT is set and read would block on retry\n\nWhen a read is retried, raid1_read_request() may be called with a\npre-allocated r1_bio. If wait_read_barrier() fails for a REQ_NOWAIT\nread, the bio is completed and the function returns immediately. In this\ncase the existing r1_bio is leaked.\n\nThis fixes a leak of pre-allocated r1_bio structures for retried reads."
}
],
"id": "CVE-2026-72437",
"lastModified": "2026-08-17T06:19:11.080",
"metrics": {},
"published": "2026-08-15T06:22:17.560",
"references": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/69ad6ce47f9bf2b9fe0ed69b042db993d33bbf12"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/6d92dbd73d19a0622f60352ce9d9379f7a760112"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/c66ed3e6371f5dba8f5d8ab810d6683ddc99201e"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/c6e6354295845698d2fdfa20b71fc404786f7e93"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/d1eda529a4bf6b866d02755723ee0eb1f037a5ed"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/db58075bc9c2ad2731f9c063859b47104bc2e7ef"
}
],
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"vulnStatus": "Received"
}
},
"redhat_vex": {
"aggregate_severity": "Low",
"current_release_date": "2026-08-19T17:53:56+00:00",
"cve": "CVE-2026-72437",
"id": "CVE-2026-72437",
"initial_release_date": "2026-08-15T00:00:00+00:00",
"product_status:known_affected": "246",
"product_status:known_not_affected": "28",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "kernel: md/raid1: free r1_bio when REQ_NOWAIT is set and read would block on retry",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-72437.json",
"version": "3"
},
"suse_vex": {
"aggregate_severity": "low",
"current_release_date": "2026-10-03T00:28:02Z",
"cve": "CVE-2026-72437",
"id": "CVE-2026-72437",
"initial_release_date": "2026-09-01T17:13:49Z",
"product_status:known_affected": "179",
"product_status:known_not_affected": "185",
"product_status:recommended": "145",
"source": "SUSE CSAF VEX",
"status": "interim",
"title": "SUSE CVE CVE-2026-72437",
"url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-72437.json",
"version": "6"
}
}
}
Loading…
Loading…
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.
Loading…
Loading…
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.
Loading…
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.
Loading…