Vulnerability-Lookup

SUSE-SU-2026:1060-1

Vulnerability from csaf_suse - Published: 2026-03-26 10:04 - Updated: 2026-09-16 19:11

Summary

Security update for the Linux Kernel (Live Patch 35 for SUSE Linux Enterprise 15 SP5)

Severity

Important

Notes

Title of the patch: Security update for the Linux Kernel (Live Patch 35 for SUSE Linux Enterprise 15 SP5)

Description of the patch: This update for the SUSE Linux Enterprise Kernel 5.14.21-150500.55.136 fixes one security issue The following security issue was fixed: - CVE-2025-21738: ata: libata-sff: ensure that we cannot write outside the allocated buffer (bsc#1257118).

Patchnames: SUSE-2026-1060,SUSE-SLE-Module-Live-Patching-15-SP5-2026-1060

CVE-2025-21738

7.8 (High)


                
                  CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

Recommended 3 products

Product	Version	Remediation
Unresolved product id: SUSE Linux Enterprise Live Patching 15 SP5:kernel-livepatch-5_14_21-150500_55_136-default-2-150500.2.1.ppc64le	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Live Patching 15 SP5:kernel-livepatch-5_14_21-150500_55_136-default-2-150500.2.1.s390x	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Live Patching 15 SP5:kernel-livepatch-5_14_21-150500_55_136-default-2-150500.2.1.x86_64	—	Vendor Fix

Threats

Impact important

References

9 references

URL	Category
https://www.suse.com/support/security/rating/	external
https://ftp.suse.com/pub/projects/security/csaf/s…	self
https://www.suse.com/support/update/announcement/…	self
https://lists.suse.com/pipermail/sle-security-upd…	self
https://bugzilla.suse.com/1257118	self
https://www.suse.com/security/cve/CVE-2025-21738/	self
https://www.suse.com/security/cve/CVE-2025-21738	external
https://bugzilla.suse.com/1238917	external
https://bugzilla.suse.com/1257118	external

JSON

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        {
          "category": "general",
          "text": "In the Linux kernel, the following vulnerability has been resolved:\n\nata: libata-sff: Ensure that we cannot write outside the allocated buffer\n\nreveliofuzzing reported that a SCSI_IOCTL_SEND_COMMAND ioctl with out_len\nset to 0xd42, SCSI command set to ATA_16 PASS-THROUGH, ATA command set to\nATA_NOP, and protocol set to ATA_PROT_PIO, can cause ata_pio_sector() to\nwrite outside the allocated buffer, overwriting random memory.\n\nWhile a ATA device is supposed to abort a ATA_NOP command, there does seem\nto be a bug either in libata-sff or QEMU, where either this status is not\nset, or the status is cleared before read by ata_sff_hsm_move().\nAnyway, that is most likely a separate bug.\n\nLooking at __atapi_pio_bytes(), it already has a safety check to ensure\nthat __atapi_pio_bytes() cannot write outside the allocated buffer.\n\nAdd a similar check to ata_pio_sector(), such that also ata_pio_sector()\ncannot write outside the allocated buffer.",
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      "title": "CVE-2025-21738"
    }
  ]
}

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

Vulnerability from cvelistv5 – Published: 2025-02-27 02:12 – Updated: 2026-08-05 11:54

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

7.8 (High)


                        
                          CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Assigner

Linux mitre root

References

6 references

URL	Tags
https://git.kernel.org/stable/c/a8f8cf87059ed1905…
https://git.kernel.org/stable/c/d5e6e3000309359ea…
https://git.kernel.org/stable/c/0dd5aade301a10f4b…
https://git.kernel.org/stable/c/0a17a9944b8d89ef0…
https://git.kernel.org/stable/c/6e74e53b34b6dec5a…
https://lists.debian.org/debian-lts-announce/2025…

Impacted products

2 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)
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)

Show details on NVD website

JSON

To clipboard

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        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nata: libata-sff: Ensure that we cannot write outside the allocated buffer\n\nreveliofuzzing reported that a SCSI_IOCTL_SEND_COMMAND ioctl with out_len\nset to 0xd42, SCSI command set to ATA_16 PASS-THROUGH, ATA command set to\nATA_NOP, and protocol set to ATA_PROT_PIO, can cause ata_pio_sector() to\nwrite outside the allocated buffer, overwriting random memory.\n\nWhile a ATA device is supposed to abort a ATA_NOP command, there does seem\nto be a bug either in libata-sff or QEMU, where either this status is not\nset, or the status is cleared before read by ata_sff_hsm_move().\nAnyway, that is most likely a separate bug.\n\nLooking at __atapi_pio_bytes(), it already has a safety check to ensure\nthat __atapi_pio_bytes() cannot write outside the allocated buffer.\n\nAdd a similar check to ata_pio_sector(), such that also ata_pio_sector()\ncannot write outside the allocated buffer."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:L - The vulnerability is triggered through the SCSI_IOCTL_SEND_COMMAND (or SG_IO) ioctl issued on a local ATA block device node, requiring local system access. There is no network-facing path into libata\u0027s PIO transfer code.\nAC:L - The attacker deterministically controls both required conditions \u2014 the buffer length (any out_len/in_len that is not a multiple of the 512-byte sector size) and the ATA sector count in the pass-through CDB \u2014 with no race, no memory-layout dependency, and no reliance on the device\u0027s error behaviour when a normal PIO read/write command is used.\nPR:L - The ATA_12 pass-through opcode 0xA1 aliases GPCMD_BLANK in scsi_cmd_allowed(), so it is permitted for any unprivileged user holding a write-opened fd on the block device \u2014 no CAP_SYS_RAWIO is needed \u2014 which is routinely the case for disk-group members, containers with device passthrough, and embedded/appliance images with permissive device nodes.\nUI:N - The attacker triggers the entire sequence from its own process via a single ioctl; no action by any other user or administrator is required.\nS:U - The out-of-bounds write corrupts kernel memory within the same security authority; there is no crossing of a VM, IOMMU, or hypervisor boundary.\nC:H - In the data-out direction (ATA_CMD_PIO_WRITE with an unaligned in_len) the kernel reads far past the end of the kmalloc\u0027d buffer and streams that kernel memory to attacker-chosen disk sectors, which can then simply be read back \u2014 an unbounded kernel-memory disclosure primitive.\nI:H - In the data-in direction the kernel writes up to ~128 KB of device-supplied data (contents of disk sectors the attacker previously wrote, hence fully controlled) past the end of a small slab allocation into adjacent pages, giving a controlled-content heap overflow suitable for control-flow hijacking and privilege escalation.\nA:H - Overwriting arbitrary adjacent kernel pages and slab metadata with attacker data reliably corrupts unrelated kernel structures, producing oopses, slab corruption BUGs, and full system panics."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T11:54:05.569Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/a8f8cf87059ed1905c2a5c72f8b39a4f57b11b4c"
        },
        {
          "url": "https://git.kernel.org/stable/c/d5e6e3000309359eae2a17117aa6e3c44897bf6c"
        },
        {
          "url": "https://git.kernel.org/stable/c/0dd5aade301a10f4b329fa7454fdcc2518741902"
        },
        {
          "url": "https://git.kernel.org/stable/c/0a17a9944b8d89ef03946121241870ac53ddaf45"
        },
        {
          "url": "https://git.kernel.org/stable/c/6e74e53b34b6dec5a50e1404e2680852ec6768d2"
        }
      ],
      "title": "ata: libata-sff: Ensure that we cannot write outside the allocated buffer",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-21738",
    "datePublished": "2025-02-27T02:12:13.942Z",
    "dateReserved": "2024-12-29T08:45:45.757Z",
    "dateUpdated": "2026-08-05T11:54:05.569Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.