CVE-2026-72014 (GCVE-0-2026-72014)
Vulnerability from cvelistv5
Published
2026-08-15 05:51
Modified
2026-08-17 05:39
Severity ?
VLAI Severity ?
EPSS score ?
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 | ||
|---|---|---|---|---|
| Linux | Linux |
Version: b411b3637fa71fce9cf2acf0639009500f5892fe Version: b411b3637fa71fce9cf2acf0639009500f5892fe Version: b411b3637fa71fce9cf2acf0639009500f5892fe Version: b411b3637fa71fce9cf2acf0639009500f5892fe Version: b411b3637fa71fce9cf2acf0639009500f5892fe Version: b411b3637fa71fce9cf2acf0639009500f5892fe Version: b411b3637fa71fce9cf2acf0639009500f5892fe Version: b411b3637fa71fce9cf2acf0639009500f5892fe |
||
{
"containers": {
"cna": {
"affected": [
{
"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"
},
{
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"status": "affected",
"version": "b411b3637fa71fce9cf2acf0639009500f5892fe",
"versionType": "git"
},
{
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"status": "affected",
"version": "b411b3637fa71fce9cf2acf0639009500f5892fe",
"versionType": "git"
},
{
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"status": "affected",
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"versionType": "git"
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{
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"versionType": "git"
},
{
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"status": "affected",
"version": "b411b3637fa71fce9cf2acf0639009500f5892fe",
"versionType": "git"
},
{
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"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"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "5.10.261",
"versionStartIncluding": "2.6.33",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "5.15.212",
"versionStartIncluding": "2.6.33",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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{
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"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.12.97",
"versionStartIncluding": "2.6.33",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.18.40",
"versionStartIncluding": "2.6.33",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "7.1.5",
"versionStartIncluding": "2.6.33",
"vulnerable": true
},
{
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"versionEndExcluding": "7.2",
"versionStartIncluding": "2.6.33",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"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."
}
],
"metrics": [
{
"cvssV3_1": {
"baseScore": 9.8,
"baseSeverity": "CRITICAL",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
"scenarios": [
{
"lang": "en",
"value": "AV:N - Exploitation is delivered over the DRBD replication TCP protocol when a victim node receives a malicious P_DATA_REPLY from its peer or a man-in-the-middle on that link; recv_dless_read() is reached from drbdd() without any local syscall or ioctl on the victim.\nAC:L - The peer fully controls the wire length in the P_DATA_REPLY header, and two independent triggers (unsigned-to-signed overflow or digest subtraction underflow) deterministically force expect negative so drbd_recv_all_warn() receives SIZE_MAX bytes whenever the victim issues a remote read.\nPR:N - No account, capability, or administrative access on the victim host is required; a malicious DRBD peer or network man-in-the-middle on the replication link can send the crafted reply after connection setup, and cram-hmac-alg peer authentication is optional.\nUI:N - No end-user action is needed because diskless-primary and read-balancing configurations automatically send P_DATA_REQUEST packets to the peer, and the malicious P_DATA_REPLY is processed in the kernel receiver thread during normal I/O.\nS:U - The out-of-bounds socket receive corrupts kernel memory on the same host that runs DRBD; successful exploitation yields kernel compromise on that node but does not by itself cross a VM, container, or IOMMU security boundary.\nC:H - Receiving up to SIZE_MAX attacker-controlled bytes past the mapped bio page is an out-of-bounds kernel write that can corrupt adjacent heap or page data and be leveraged for arbitrary kernel memory disclosure, not merely a bounded leak.\nI:H - The bug copies attacker-chosen network data beyond the allocated bio buffer boundary, providing a kernel out-of-bounds write primitive that can corrupt kernel structures and enable arbitrary code execution or privilege escalation.\nA:H - Writing gigabytes past a bio page can immediately corrupt critical kernel memory and cause oops or panic, and repeated malicious replies can keep the node unavailable even before full exploitation."
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-08-17T05:39:26.031Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/bca33f5442c3094511719d9db792ce3165d87e76"
},
{
"url": "https://git.kernel.org/stable/c/741a682535deffe9ab7e5c89caf83571efbc9dd9"
},
{
"url": "https://git.kernel.org/stable/c/f14e87d7b166490bceb9603b39310e51595d05b9"
},
{
"url": "https://git.kernel.org/stable/c/f16866c62656865854106b79bcf6e4ca97a51a92"
},
{
"url": "https://git.kernel.org/stable/c/5f59a8142000f0b8f75c432209ead73c424a745d"
},
{
"url": "https://git.kernel.org/stable/c/38cc4867540ae8beedfe41a1a1a6ed37052c77d6"
},
{
"url": "https://git.kernel.org/stable/c/648d4317326e6aa3f8c05cbf0fd14cc2eba6ca99"
},
{
"url": "https://git.kernel.org/stable/c/bd910a7660d280595ef94cb6d193951d855d330f"
}
],
"title": "drbd: reject data replies with an out-of-range payload size",
"x_generator": {
"engine": "bippy-1.2.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2026-72014",
"datePublished": "2026-08-15T05:51:42.741Z",
"dateReserved": "2026-08-09T03:40:39.899Z",
"dateUpdated": "2026-08-17T05:39:26.031Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
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