CVE-2026-98545
In the Linux kernel, the following vulnerability has been resolved:
ata: libata-scsi: bound the ATA passthru sense descriptor writes
When an ATA PASS-THROUGH command to an ATAPI device fails, the sense buffer holds the device's REQUEST SENSE reply, and ata_scsi_set_passthru_sense_fields() trusts its additional length byte, sb[7], when adding the ATA Status Return descriptor. A faulty or malicious device can use that to make the kernel read and write past the 96-byte buffer in three ways:
- scsi_sense_desc_find() is passed sb[7] + 8 as the buffer length, so its clamp against sb[7] does nothing and the walk runs off the end. - A type-9 descriptor found near the end is filled in unchecked. - A new descriptor at sb[8 + len] needs len + 22 bytes, not len + 14, so len 75..82 writes up to 8 bytes past the end.
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Reproduced with KASAN under qemu, with the emulated ATAPI REQUEST SENSE reply patched:
Both are gone with this patch, and a valid descriptor is still filled in.
Technical details traces, logs and code from the original report
BUG: KASAN: slab-out-of-bounds in scsi_sense_desc_find+0x1a5/0x210 BUG: KASAN: slab-out-of-bounds in ata_scsi_qc_complete+0x1a15/0x1a50
CVSS
NVD hasn't assigned a CVSS score to this CVE (common since the April 2026 policy change).
Exploitation probability (EPSS)
- Probability of exploitation in the next 30 days
- 0.20 %
- Percentile among all scored CVEs
- 9
- Score date
- 10/20/2026
EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).
Affected technologies (1)
⚠ AI-inferred from the description — NVD hasn't analyzed this CVE yet, these aren't verified CPEs.
References
Show 5 references
- https://git.kernel.org/stable/c/1603abb0c50420e97cf4a1feddbd5e183c5fdf86
- https://git.kernel.org/stable/c/80320b278fea07ffcda3f57b67b61658e0a4e1ca
- https://git.kernel.org/stable/c/80fbb0bc4d11683c88f2f9d3997ea02fcada5408
- https://git.kernel.org/stable/c/c698f6deabf680f8f4a1727ef2dc80fe78815fbf
- https://git.kernel.org/stable/c/d9a7147b93624660626cd7c3b1143715699e1f5c
Raw JSON (NVD)
Show
{
"id": "CVE-2026-98545",
"cveTags": [],
"metrics": {},
"affected": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"affectedData": [
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "ce477199c53e3db5a096981c565e232498ddeae4",
"lessThan": "c698f6deabf680f8f4a1727ef2dc80fe78815fbf",
"versionType": "git"
},
{
"status": "affected",
"version": "97981926224afe17ba3e22e0c2b7dd8b516ee574",
"lessThan": "d9a7147b93624660626cd7c3b1143715699e1f5c",
"versionType": "git"
},
{
"status": "affected",
"version": "97981926224afe17ba3e22e0c2b7dd8b516ee574",
"lessThan": "1603abb0c50420e97cf4a1feddbd5e183c5fdf86",
"versionType": "git"
},
{
"status": "affected",
"version": "97981926224afe17ba3e22e0c2b7dd8b516ee574",
"lessThan": "80fbb0bc4d11683c88f2f9d3997ea02fcada5408",
"versionType": "git"
},
{
"status": "affected",
"version": "97981926224afe17ba3e22e0c2b7dd8b516ee574",
"lessThan": "80320b278fea07ffcda3f57b67b61658e0a4e1ca",
"versionType": "git"
},
{
"status": "affected",
"version": "67d9d0b6ae4aaf2c4cef103a96a145c7fdfb15f8",
"versionType": "git"
},
{
"status": "affected",
"version": "6.6.44",
"lessThan": "6.6.158",
"versionType": "semver"
},
{
"status": "affected",
"version": "6.10.3",
"lessThan": "6.11",
"versionType": "semver"
}
],
"programFiles": [
"drivers/ata/libata-scsi.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "6.11"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "6.11",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.6.158",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.112",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.55",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.9",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/ata/libata-scsi.c"
],
"defaultStatus": "affected"
}
]
}
],
"published": "2026-10-18T16:17:06.403",
"references": [
{
"url": "https://git.kernel.org/stable/c/1603abb0c50420e97cf4a1feddbd5e183c5fdf86",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/80320b278fea07ffcda3f57b67b61658e0a4e1ca",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/80fbb0bc4d11683c88f2f9d3997ea02fcada5408",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/c698f6deabf680f8f4a1727ef2dc80fe78815fbf",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/d9a7147b93624660626cd7c3b1143715699e1f5c",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}
],
"vulnStatus": "Received",
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nata: libata-scsi: bound the ATA passthru sense descriptor writes\n\nWhen an ATA PASS-THROUGH command to an ATAPI device fails, the sense\nbuffer holds the device's REQUEST SENSE reply, and\nata_scsi_set_passthru_sense_fields() trusts its additional length\nbyte, sb[7], when adding the ATA Status Return descriptor. A faulty\nor malicious device can use that to make the kernel read and write\npast the 96-byte buffer in three ways:\n\n- scsi_sense_desc_find() is passed sb[7] + 8 as the buffer length, so\n its clamp against sb[7] does nothing and the walk runs off the end.\n- A type-9 descriptor found near the end is filled in unchecked.\n- A new descriptor at sb[8 + len] needs len + 22 bytes, not len + 14,\n so len 75..82 writes up to 8 bytes past the end.\n\nReproduced with KASAN under qemu, with the emulated ATAPI REQUEST SENSE\nreply patched:\n\n BUG: KASAN: slab-out-of-bounds in scsi_sense_desc_find+0x1a5/0x210\n BUG: KASAN: slab-out-of-bounds in ata_scsi_qc_complete+0x1a15/0x1a50\n\nBoth are gone with this patch, and a valid descriptor is still filled\nin."
}
],
"lastModified": "2026-10-19T10:19:10.470",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}