drbd: reject data replies with an out-of-range payload size
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.
CVE-2026-72014
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-72014
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "b411b3637fa71fce9cf2acf0639009500f5892fe",
"lessThan": "bca33f5442c3094511719d9db792ce3165d87e76",
"versionType": "git"
},
{
"status": "affected",
"version": "b411b3637fa71fce9cf2acf0639009500f5892fe",
"lessThan": "741a682535deffe9ab7e5c89caf83571efbc9dd9",
"versionType": "git"
},
{
"status": "affected",
"version": "b411b3637fa71fce9cf2acf0639009500f5892fe",
"lessThan": "f14e87d7b166490bceb9603b39310e51595d05b9",
"versionType": "git"
},
{
"status": "affected",
"version": "b411b3637fa71fce9cf2acf0639009500f5892fe",
"lessThan": "f16866c62656865854106b79bcf6e4ca97a51a92",
"versionType": "git"
},
{
"status": "affected",
"version": "b411b3637fa71fce9cf2acf0639009500f5892fe",
"lessThan": "5f59a8142000f0b8f75c432209ead73c424a745d",
"versionType": "git"
},
{
"status": "affected",
"version": "b411b3637fa71fce9cf2acf0639009500f5892fe",
"lessThan": "38cc4867540ae8beedfe41a1a1a6ed37052c77d6",
"versionType": "git"
},
{
"status": "affected",
"version": "b411b3637fa71fce9cf2acf0639009500f5892fe",
"lessThan": "648d4317326e6aa3f8c05cbf0fd14cc2eba6ca99",
"versionType": "git"
},
{
"status": "affected",
"version": "b411b3637fa71fce9cf2acf0639009500f5892fe",
"lessThan": "bd910a7660d280595ef94cb6d193951d855d330f",
"versionType": "git"
}
],
"programFiles": [
"drivers/block/drbd/drbd_receiver.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "2.6.33"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "2.6.33",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.10.261",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.212",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.178",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.145",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.97",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.40",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.1.5",
"versionType": "semver",
"lessThanOrEqual": "7.1.*"
},
{
"status": "unaffected",
"version": "7.2",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/block/drbd/drbd_receiver.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-72014
Source reference:
/cveMetadata/cveId
Publisher severity
critical
Source reference: /containers/cna/metrics
- Event
- #41739 · Revision 1
- Added to Heist Feed
- Publisher date