FKIE_CVE-2026-72014
Vulnerability from fkie_nvd - Published: 2026-08-15 06:21 - Updated: 2026-08-17 06:17
Severity
Summary
In the Linux kernel, the following vulnerability has been resolved:
drbd: reject data replies with an out-of-range payload size
recv_dless_read() receives a P_DATA_REPLY from a peer into the bio of an
outstanding read request. The peer-supplied payload length reaches it as
the signed int data_size, and two peer-controlled inputs can make it
negative. With a negotiated data-integrity-alg the digest length is
subtracted first, so a reply whose payload is smaller than the digest
underflows data_size. With no integrity algorithm (the default) data_size
is assigned from the unsigned h95/h100 wire length and drbdd() never
bounds it for a payload-carrying command, so a length above INT_MAX casts
it negative; this path needs no non-default feature. The bio receive loop
then computes expect = min_t(int, data_size, bv_len), which is negative,
and drbd_recv_all_warn(mapped, expect) receives with a size_t of SIZE_MAX
into the first mapped page.
The sibling receive path read_in_block() is not affected: it uses an
unsigned size and rejects it against DRBD_MAX_BIO_SIZE before receiving.
Reject a data reply whose size is negative after the optional digest
subtraction, covering both triggers.
Impact: a malicious or man-in-the-middle DRBD peer copies attacker-chosen
bytes past a bio page in the receiver, corrupting kernel memory. A node
that reads from its peer (a diskless node, or read-balancing to the peer)
is exposed in the default configuration; data-integrity-alg is not
required.
References
Impacted products
| Vendor | Product | Version |
|---|
{
"affected": [
{
"affectedData": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"drivers/block/drbd/drbd_receiver.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"lessThan": "bca33f5442c3094511719d9db792ce3165d87e76",
"status": "affected",
"version": "b411b3637fa71fce9cf2acf0639009500f5892fe",
"versionType": "git"
},
{
"lessThan": "741a682535deffe9ab7e5c89caf83571efbc9dd9",
"status": "affected",
"version": "b411b3637fa71fce9cf2acf0639009500f5892fe",
"versionType": "git"
},
{
"lessThan": "f14e87d7b166490bceb9603b39310e51595d05b9",
"status": "affected",
"version": "b411b3637fa71fce9cf2acf0639009500f5892fe",
"versionType": "git"
},
{
"lessThan": "f16866c62656865854106b79bcf6e4ca97a51a92",
"status": "affected",
"version": "b411b3637fa71fce9cf2acf0639009500f5892fe",
"versionType": "git"
},
{
"lessThan": "5f59a8142000f0b8f75c432209ead73c424a745d",
"status": "affected",
"version": "b411b3637fa71fce9cf2acf0639009500f5892fe",
"versionType": "git"
},
{
"lessThan": "38cc4867540ae8beedfe41a1a1a6ed37052c77d6",
"status": "affected",
"version": "b411b3637fa71fce9cf2acf0639009500f5892fe",
"versionType": "git"
},
{
"lessThan": "648d4317326e6aa3f8c05cbf0fd14cc2eba6ca99",
"status": "affected",
"version": "b411b3637fa71fce9cf2acf0639009500f5892fe",
"versionType": "git"
},
{
"lessThan": "bd910a7660d280595ef94cb6d193951d855d330f",
"status": "affected",
"version": "b411b3637fa71fce9cf2acf0639009500f5892fe",
"versionType": "git"
}
]
},
{
"defaultStatus": "affected",
"product": "Linux",
"programFiles": [
"drivers/block/drbd/drbd_receiver.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "2.6.33"
},
{
"lessThan": "2.6.33",
"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.10.*",
"status": "unaffected",
"version": "5.10.261",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"version": "5.15.212",
"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\ndrbd: reject data replies with an out-of-range payload size\n\nrecv_dless_read() receives a P_DATA_REPLY from a peer into the bio of an\noutstanding read request. The peer-supplied payload length reaches it as\nthe signed int data_size, and two peer-controlled inputs can make it\nnegative. With a negotiated data-integrity-alg the digest length is\nsubtracted first, so a reply whose payload is smaller than the digest\nunderflows data_size. With no integrity algorithm (the default) data_size\nis assigned from the unsigned h95/h100 wire length and drbdd() never\nbounds it for a payload-carrying command, so a length above INT_MAX casts\nit negative; this path needs no non-default feature. The bio receive loop\nthen computes expect = min_t(int, data_size, bv_len), which is negative,\nand drbd_recv_all_warn(mapped, expect) receives with a size_t of SIZE_MAX\ninto the first mapped page.\n\nThe sibling receive path read_in_block() is not affected: it uses an\nunsigned size and rejects it against DRBD_MAX_BIO_SIZE before receiving.\nReject a data reply whose size is negative after the optional digest\nsubtraction, covering both triggers.\n\nImpact: a malicious or man-in-the-middle DRBD peer copies attacker-chosen\nbytes past a bio page in the receiver, corrupting kernel memory. A node\nthat reads from its peer (a diskless node, or read-balancing to the peer)\nis exposed in the default configuration; data-integrity-alg is not\nrequired."
}
],
"id": "CVE-2026-72014",
"lastModified": "2026-08-17T06:17:58.877",
"metrics": {
"cvssMetricV31": [
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 9.8,
"baseSeverity": "CRITICAL",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
"exploitabilityScore": 3.9,
"impactScore": 5.9,
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"type": "Secondary"
}
]
},
"published": "2026-08-15T06:21:00.173",
"references": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/38cc4867540ae8beedfe41a1a1a6ed37052c77d6"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/5f59a8142000f0b8f75c432209ead73c424a745d"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/648d4317326e6aa3f8c05cbf0fd14cc2eba6ca99"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/741a682535deffe9ab7e5c89caf83571efbc9dd9"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/bca33f5442c3094511719d9db792ce3165d87e76"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/bd910a7660d280595ef94cb6d193951d855d330f"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/f14e87d7b166490bceb9603b39310e51595d05b9"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/f16866c62656865854106b79bcf6e4ca97a51a92"
}
],
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"vulnStatus": "Received"
}
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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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