scsi: libiscsi: Fix stale-data leak into the SCSI sense buffer
In the Linux kernel, the following vulnerability has been resolved: scsi: libiscsi: Fix stale-data leak into the SCSI sense buffer iscsi_scsi_cmd_rsp() copies the sense data of a SCSI Response from the target-supplied data segment. The segment carries a 2-byte sense length followed by the sense bytes, so it must hold 2 + senselen bytes, but the bounds check only requires datalen >= senselen: senselen = get_unaligned_be16(data); if (datalen < senselen) goto invalid_datalen; memcpy(sc->sense_buffer, data + 2, min_t(uint16_t, senselen, SCSI_SENSE_BUFFERSIZE)); A target that returns a SCSI Response whose datalen equals senselen (with senselen <= SCSI_SENSE_BUFFERSIZE) makes the memcpy() from data + 2 read up to two bytes past the received data. Those bytes are stale conn->data contents and end up in the command's sense buffer, which is returned to userspace. Account for the 2-byte sense length prefix in the check.
CVE-2026-74557
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-2026-74557
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": "7996a778ff8c717cb1a7a294475c59cc8f1e9fb8",
"lessThan": "812f1ae95b22419422972748f173b0916ee4d621",
"versionType": "git"
},
{
"status": "affected",
"version": "7996a778ff8c717cb1a7a294475c59cc8f1e9fb8",
"lessThan": "fef6167e8149896cd81bea333fd51b1c91239149",
"versionType": "git"
},
{
"status": "affected",
"version": "7996a778ff8c717cb1a7a294475c59cc8f1e9fb8",
"lessThan": "baa04572673125e4d5bc309b4077d1cb46cc78d1",
"versionType": "git"
},
{
"status": "affected",
"version": "7996a778ff8c717cb1a7a294475c59cc8f1e9fb8",
"lessThan": "7567f06abdefb1caf2d836107c4d08c5185c650e",
"versionType": "git"
},
{
"status": "affected",
"version": "7996a778ff8c717cb1a7a294475c59cc8f1e9fb8",
"lessThan": "60499924faf4ef97e84228c20515218ef121facf",
"versionType": "git"
},
{
"status": "affected",
"version": "7996a778ff8c717cb1a7a294475c59cc8f1e9fb8",
"lessThan": "3ef209ca0b4b68c75e9a814d90cc916026b5a6ac",
"versionType": "git"
},
{
"status": "affected",
"version": "7996a778ff8c717cb1a7a294475c59cc8f1e9fb8",
"lessThan": "1f07a897d43c63e6c9458bf77450defef39b5833",
"versionType": "git"
},
{
"status": "affected",
"version": "7996a778ff8c717cb1a7a294475c59cc8f1e9fb8",
"lessThan": "98b87885de4b7f605533a2860685f5689fce8e82",
"versionType": "git"
}
],
"programFiles": [
"drivers/scsi/libiscsi.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "2.6.18"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "2.6.18",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.10.265",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.216",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.183",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.151",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.103",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.44",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.1.8",
"versionType": "semver",
"lessThanOrEqual": "7.1.*"
},
{
"status": "unaffected",
"version": "7.2",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/scsi/libiscsi.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-74557
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #33205 · Revision 1
- Added to Heist Feed
- Publisher date