CVE-2025-21738
- 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
- 2025-02-27T02:12:13Z
- Modified
- 2026-08-12T03:30:11Z
- Severity
-
- 7.8 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
- 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 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.
- Database specific
{ "cna_assigner": "Linux", "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/21xxx/CVE-2025-21738.json" }- References
-
- https://git.kernel.org/stable/c/0a17a9944b8d89ef03946121241870ac53ddaf45
- https://git.kernel.org/stable/c/0dd5aade301a10f4b329fa7454fdcc2518741902
- https://git.kernel.org/stable/c/6e74e53b34b6dec5a50e1404e2680852ec6768d2
- https://git.kernel.org/stable/c/a8f8cf87059ed1905c2a5c72f8b39a4f57b11b4c
- https://git.kernel.org/stable/c/d5e6e3000309359eae2a17117aa6e3c44897bf6c
- https://lists.debian.org/debian-lts-announce/2025/03/msg00028.html
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/21xxx/CVE-2025-21738.json
- https://nvd.nist.gov/vuln/detail/CVE-2025-21738
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
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
-
Introduced5a5dbd18a7496ed403f6f54bb20c955c65482fa5Fixeda8f8cf87059ed1905c2a5c72f8b39a4f57b11b4cFixedd5e6e3000309359eae2a17117aa6e3c44897bf6cFixed0dd5aade301a10f4b329fa7454fdcc2518741902Fixed0a17a9944b8d89ef03946121241870ac53ddaf45Fixed6e74e53b34b6dec5a50e1404e2680852ec6768d2