CVE-2025-21738

Advisory lineage Upstream: 0 Downstream: 58
Modified
Published: 27 Feb 2025, 02:12
Last modified:11 May 2026, 21:05

Vulnerability Summary

Overall Risk (default)
low
22/100
CVSS Score
5.5 MEDIUM
v3.1 (nvd)
EPSS Score
0.2% LOW
0% probability +0.16%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

27 Feb 2025, 02:12
Published
Vulnerability first disclosed
11 May 2026, 21:05
Last Modified
Vulnerability information updated

Description

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.

CVSS Metrics

  • v3.1•MEDIUM•Score: 5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

EPSS Trends

Current EPSS score: 0.20%• Percentile: 10%

Affected Systems

  • linux•linux

    ≥ 5a5dbd18a7496ed403f6f54bb20c955c65482fa5, < a8f8cf87059ed1905c2a5c72f8b39a4f57b11b4c | ≥ 5a5dbd18a7496ed403f6f54bb20c955c65482fa5, < d5e6e3000309359eae2a17117aa6e3c44897bf6c | ≥ 5a5dbd18a7496ed403f6f54bb20c955c65482fa5, < 0dd5aade301a10f4b329fa7454fdcc2518741902 | ≥ 5a5dbd18a7496ed403f6f54bb20c955c65482fa5, < 0a17a9944b8d89ef03946121241870ac53ddaf45 | ≥ 5a5dbd18a7496ed403f6f54bb20c955c65482fa5, < 6e74e53b34b6dec5a50e1404e2680852ec6768d2 | 2.6.22

  • linux•linux kernel

    < 6.1.129 | ≥ 6.2, < 6.6.78 | ≥ 6.7, < 6.12.14 | ≥ 6.13, < 6.13.3

References (6)