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CVE-2025-21738— ata: libata-sff: Ensure that we cannot write outside the allocated buffer

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于ata_pio_sector函数中未检查缓冲区边界，可能导致越界写入。

CVSS 7.8 · High EPSS 0.22% · P12

Affected Version Matrix 12

VendorProduct Version RangeStatus
Linux Linux 5a5dbd18a7496ed403f6f54bb20c955c65482fa5< a8f8cf87059ed1905c2a5c72f8b39a4f57b11b4c affected
5a5dbd18a7496ed403f6f54bb20c955c65482fa5< d5e6e3000309359eae2a17117aa6e3c44897bf6c affected
5a5dbd18a7496ed403f6f54bb20c955c65482fa5< 0dd5aade301a10f4b329fa7454fdcc2518741902 affected
5a5dbd18a7496ed403f6f54bb20c955c65482fa5< 0a17a9944b8d89ef03946121241870ac53ddaf45 affected
5a5dbd18a7496ed403f6f54bb20c955c65482fa5< 6e74e53b34b6dec5a50e1404e2680852ec6768d2 affected
2.6.22 affected
< 2.6.22 unaffected
6.1.129≤ 6.1.* unaffected
… +4 more rows
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I. Basic Information for CVE-2025-21738

Vulnerability Information
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Vulnerability Title
ata: libata-sff: Ensure that we cannot write outside the allocated buffer
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于ata_pio_sector函数中未检查缓冲区边界，可能导致越界写入。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux 5a5dbd18a7496ed403f6f54bb20c955c65482fa5 ~ a8f8cf87059ed1905c2a5c72f8b39a4f57b11b4c -
Linux Linux 2.6.22 -

II. Public POCs for CVE-2025-21738

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III. Intelligence Information for CVE-2025-21738

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Patches & Fixes for CVE-2025-21738 (5)

Same Patch Batch · Linux · 2025-02-27 · 177 CVEs total

CVE-2025-21805 9.8 CRITICAL RDMA/rtrs: Add missing deinit() call
CVE-2025-21707 9.8 CRITICAL mptcp: consolidate suboption status
CVE-2025-21796 9.8 CRITICAL nfsd: clear acl_access/acl_default after releasing them
CVE-2025-21748 9.8 CRITICAL ksmbd: fix integer overflows on 32 bit systems
CVE-2024-58006 9.6 CRITICAL PCI: dwc: ep: Prevent changing BAR size/flags in pci_epc_set_bar()
CVE-2024-57997 8.8 HIGH wifi: wcn36xx: fix channel survey memory allocation size
CVE-2024-57995 8.8 HIGH wifi: ath12k: fix read pointer after free in ath12k_mac_assign_vif_to_vdev()
CVE-2024-57999 8.8 HIGH powerpc/pseries/iommu: IOMMU incorrectly marks MMIO range in DDW
CVE-2025-21735 8.8 HIGH NFC: nci: Add bounds checking in nci_hci_create_pipe()
CVE-2025-21710 8.2 HIGH tcp: correct handling of extreme memory squeeze
CVE-2025-21760 8.1 HIGH ndisc: extend RCU protection in ndisc_send_skb()
CVE-2024-57973 8.1 HIGH rdma/cxgb4: Prevent potential integer overflow on 32bit
CVE-2025-21766 8.1 HIGH ipv4: use RCU protection in __ip_rt_update_pmtu()
CVE-2025-21762 8.1 HIGH arp: use RCU protection in arp_xmit()
CVE-2025-21765 8.1 HIGH ipv6: use RCU protection in ip6_default_advmss()
CVE-2025-21751 7.8 HIGH net/mlx5: HWS, change error flow on matcher disconnect
CVE-2025-21729 7.8 HIGH wifi: rtw89: fix race between cancel_hw_scan and hw_scan completion
CVE-2025-21730 7.8 HIGH wifi: rtw89: avoid to init mgnt_entry list twice when WoWLAN failed
CVE-2025-21785 7.8 HIGH arm64: cacheinfo: Avoid out-of-bounds write to cacheinfo array
CVE-2025-21722 7.8 HIGH nilfs2: do not force clear folio if buffer is referenced

Showing top 20 of 177 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2025-21738

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