CVE-2025-21738

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Source
https://cve.org/CVERecord?id=CVE-2025-21738
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2025-21738.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2025-21738
Downstream
Related
Published
2025-02-27T02:12:13.942Z
Modified
2026-03-20T12:41:08.867210Z
Summary
ata: libata-sff: Ensure that we cannot write outside the allocated buffer
Details

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 SCSIIOCTLSENDCOMMAND ioctl with outlen set to 0xd42, SCSI command set to ATA16 PASS-THROUGH, ATA command set to ATANOP, and protocol set to ATAPROTPIO, can cause atapiosector() to write outside the allocated buffer, overwriting random memory.

While a ATA device is supposed to abort a ATANOP 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 atasffhsmmove(). Anyway, that is most likely a separate bug.

Looking at __atapipiobytes(), it already has a safety check to ensure that __atapipiobytes() cannot write outside the allocated buffer.

Add a similar check to atapiosector(), such that also atapiosector() cannot write outside the allocated buffer.

Database specific 
{
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/21xxx/CVE-2025-21738.json"
}
References

Affected packages

Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git

Affected ranges

Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
5a5dbd18a7496ed403f6f54bb20c955c65482fa5
Fixed
a8f8cf87059ed1905c2a5c72f8b39a4f57b11b4c
Fixed
d5e6e3000309359eae2a17117aa6e3c44897bf6c
Fixed
0dd5aade301a10f4b329fa7454fdcc2518741902
Fixed
0a17a9944b8d89ef03946121241870ac53ddaf45
Fixed
6e74e53b34b6dec5a50e1404e2680852ec6768d2

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2025-21738.json"