ata: libata-sff: Ensure that we cannot write outside the allocated buffer
In the Linux kernel, the following vulnerability has been resolved: ata: libata-sff: Ensure that we cannot write outside the allocated buffer reveliofuzzing reported that a SCSI_IOCTL_SEND_COMMAND ioctl with out_len set to 0xd42, SCSI command set to ATA_16 PASS-THROUGH, ATA command set to ATA_NOP, and protocol set to ATA_PROT_PIO, can cause ata_pio_sector() to write outside the allocated buffer, overwriting random memory. While a ATA device is supposed to abort a ATA_NOP command, there does seem to be a bug either in libata-sff or QEMU, where either this status is not set, or the status is cleared before read by ata_sff_hsm_move(). Anyway, that is most likely a separate bug. Looking at __atapi_pio_bytes(), it already has a safety check to ensure that __atapi_pio_bytes() cannot write outside the allocated buffer. Add a similar check to ata_pio_sector(), such that also ata_pio_sector() cannot write outside the allocated buffer.
CVE-2025-21738
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-2025-21738
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": "5a5dbd18a7496ed403f6f54bb20c955c65482fa5",
"lessThan": "a8f8cf87059ed1905c2a5c72f8b39a4f57b11b4c",
"versionType": "git"
},
{
"status": "affected",
"version": "5a5dbd18a7496ed403f6f54bb20c955c65482fa5",
"lessThan": "d5e6e3000309359eae2a17117aa6e3c44897bf6c",
"versionType": "git"
},
{
"status": "affected",
"version": "5a5dbd18a7496ed403f6f54bb20c955c65482fa5",
"lessThan": "0dd5aade301a10f4b329fa7454fdcc2518741902",
"versionType": "git"
},
{
"status": "affected",
"version": "5a5dbd18a7496ed403f6f54bb20c955c65482fa5",
"lessThan": "0a17a9944b8d89ef03946121241870ac53ddaf45",
"versionType": "git"
},
{
"status": "affected",
"version": "5a5dbd18a7496ed403f6f54bb20c955c65482fa5",
"lessThan": "6e74e53b34b6dec5a50e1404e2680852ec6768d2",
"versionType": "git"
}
],
"programFiles": [
"drivers/ata/libata-sff.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "2.6.22"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "2.6.22",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.1.129",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.78",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.14",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.13.3",
"versionType": "semver",
"lessThanOrEqual": "6.13.*"
},
{
"status": "unaffected",
"version": "6.14",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/ata/libata-sff.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2025-21738
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #26928 · Revision 1
- Added to Heist Feed
- Publisher date