VulnerabilityPublished 6 Oct 2026Updated 19 Oct 2026

CVE-2026-98232: Linux kernel · scsi: core: Validate MODE SENSE lengths in scsi_cdl_enable()

Affects Linux kernelSource CVE Database V5

Not known to be exploited · fixed in 39491a1ae93054fea10b4030180e5c797b2c0343 : patch Linux kernel soon.

Data as of 26 Oct 2026, 14:05 UTC

Severity

High

Rated High by Threat Radar's AI analysis · CVSS not yet scored by NVD

EPSS: 0.1% chance of exploitation in 30 days – higher than 6% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in 39491a1ae93054fea10b4030180e5c797b2c0343, 6233d0b3ef4623df0d6934dc8b93b161e9854f6b, 99a6e4a9176da456904b67dcbae6e77d122782b7 +2

Exploitation evidence

Disclosed: evidence found.
CVE published 6 Oct 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ 1b22cfb14142aba7742d307c4f8d7006f919308c, < 39491a1ae93054fea10b4030180e5c797b2c0343	Fixed in 39491a1ae93054fea10b4030180e5c797b2c0343
LinuxLinux	Affected ≥ 1b22cfb14142aba7742d307c4f8d7006f919308c, < 6233d0b3ef4623df0d6934dc8b93b161e9854f6b	Fixed in 6233d0b3ef4623df0d6934dc8b93b161e9854f6b
LinuxLinux	Affected ≥ 1b22cfb14142aba7742d307c4f8d7006f919308c, < 99a6e4a9176da456904b67dcbae6e77d122782b7	Fixed in 99a6e4a9176da456904b67dcbae6e77d122782b7
LinuxLinux	Affected ≥ 1b22cfb14142aba7742d307c4f8d7006f919308c, < 60b0b8ce803e3c2b2a9e5485ab3f88599fb4c7a4	Fixed in 60b0b8ce803e3c2b2a9e5485ab3f88599fb4c7a4
LinuxLinux	Affected ≥ 1b22cfb14142aba7742d307c4f8d7006f919308c, < 3d676e458fe0c566f5a62753dc696b6a862fc412	Fixed in 3d676e458fe0c566f5a62753dc696b6a862fc412
LinuxLinux	Affected =6.5	Fixed in–

AI-suggested

A fix is available and has been applied in the Linux kernel as of commit cee9395acd80 (Linux 7.3-rc1). The patch caps the available length to the buffer size and validates mode header and block descriptor lengths before accessing the ATA feature mode page. Users should update to the fixed kernel versions containing these commits to remediate the vulnerability.

Description

A vulnerability in the Linux kernel's SCSI core component (scsi_cdl_enable) allows a specially crafted USB storage device that identifies as an ATA device with CDL support to cause out-of-bounds reads from the kernel stack. This occurs due to improper validation of MODE SENSE length fields, leading to potential disclosure of kernel stack contents during device enumeration without requiring filesystem mount or user access.

Impact

An attacker controlling a USB storage device that identifies as an ATA device with CDL support can exploit this vulnerability to read kernel stack memory contents during device enumeration. This disclosure occurs without any user or filesystem interaction, potentially leaking sensitive kernel data. There is no indication of remote code execution or privilege escalation from the provided data.

Summary

The Linux kernel's scsi_cdl_enable() function uses length fields returned by MODE SENSE commands to locate the ATA feature mode page in a fixed 64-byte stack buffer. A target device can report a total length shorter than its mode header and block descriptors, causing unsigned subtraction to wrap and buf_data to point beyond the buffer. During automatic scanning, this leads to a read-modify-write operation on an out-of-bounds stack byte and subsequent copying of up to 64 bytes from outside the buffer into the MODE SELECT payload. This vulnerability is exploitable during enumeration of a USB storage device that claims ATA and CDL support, without requiring filesystem or user interaction. The issue was fixed by capping the length to the buffer size, validating mode header and block descriptor lengths before use, and requiring sufficient bytes to access the CDL field.

References

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 26 Oct 2026, 12:09 UTC

Technical details

References

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