CVE-2025-21738 (GCVE-0-2025-21738)

Vulnerability from cvelistv5 – Published: 2025-02-27 02:12 – Updated: 2026-01-02 15:28
VLAI?
Title
ata: libata-sff: Ensure that we cannot write outside the allocated buffer
Summary
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.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 5a5dbd18a7496ed403f6f54bb20c955c65482fa5 , < a8f8cf87059ed1905c2a5c72f8b39a4f57b11b4c (git)
Affected: 5a5dbd18a7496ed403f6f54bb20c955c65482fa5 , < d5e6e3000309359eae2a17117aa6e3c44897bf6c (git)
Affected: 5a5dbd18a7496ed403f6f54bb20c955c65482fa5 , < 0dd5aade301a10f4b329fa7454fdcc2518741902 (git)
Affected: 5a5dbd18a7496ed403f6f54bb20c955c65482fa5 , < 0a17a9944b8d89ef03946121241870ac53ddaf45 (git)
Affected: 5a5dbd18a7496ed403f6f54bb20c955c65482fa5 , < 6e74e53b34b6dec5a50e1404e2680852ec6768d2 (git)
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    Linux Linux Affected: 2.6.22
Unaffected: 0 , < 2.6.22 (semver)
Unaffected: 6.1.129 , ≤ 6.1.* (semver)
Unaffected: 6.6.78 , ≤ 6.6.* (semver)
Unaffected: 6.12.14 , ≤ 6.12.* (semver)
Unaffected: 6.13.3 , ≤ 6.13.* (semver)
Unaffected: 6.14 , ≤ * (original_commit_for_fix)
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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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