CVE-2026-98232
scsi: core: Validate MODE SENSE lengths in scsi_cdl_enable()
No known exploitation. EPSS puts it in the 7th percentile. Fixed versions are out.
What to do
Find your product and version, then upgrade to the build on the right.
- LinuxAffected: ≥ 1b22cfb14142aba7742d307c4f8d7006f919308c, < 39491a1ae93054fea10b4030180e5c797b2c0343Upgrade to: 39491a1ae93054fea10b4030180e5c797b2c0343Affected: ≥ 1b22cfb14142aba7742d307c4f8d7006f919308c, < 60b0b8ce803e3c2b2a9e5485ab3f88599fb4c7a4Upgrade to: 60b0b8ce803e3c2b2a9e5485ab3f88599fb4c7a4Affected: ≥ 1b22cfb14142aba7742d307c4f8d7006f919308c, < 6233d0b3ef4623df0d6934dc8b93b161e9854f6bUpgrade to: 6233d0b3ef4623df0d6934dc8b93b161e9854f6bAffected: ≥ 1b22cfb14142aba7742d307c4f8d7006f919308c, < 99a6e4a9176da456904b67dcbae6e77d122782b7Upgrade to: 99a6e4a9176da456904b67dcbae6e77d122782b7 + 1 more branchStated by: CVE record
Versions as the sources state them. Full version matrix after sign-in
What it is
From the CVE record
In the Linux kernel, the following vulnerability has been resolved: scsi: core: Validate MODE SENSE lengths in scsi_cdl_enable() scsi_cdl_enable() uses length fields returned by MODE SENSE to locate the ATA feature mode page in a 64-byte stack buffer. A target can report a total length shorter than its mode header and block descriptors. The unsigned subtraction used for the MODE SELECT length can wrap, and the separately computed buf_data can point beyond buf. During automatic scan, enable is false, so the read-modify-write of buf_data[4] can clear the low two bits of a target-selected out-of-bounds stack byte. scsi_mode_select() can then copy up to 64 bytes from outside the buffer into the outgoing MODE SELECT payload, disclosing stack contents to the target. This is reachable while scanning a USB storage device that identifies as an ATA device and advertises CDL support. No filesystem mount or userspace access to the block device is required. On upstream commit cee9395acd80 ("Linux 7.3-rc1"), a build-specific, one-vCPU QEMU/Raw Gadget proof using QEMU-only multi-UDC allocator sampling executed a fixed proof command inside the guest and created a UID-0-owned marker during automatic enumeration, with KASLR and NX enabled. The issue was independently found during security research at Drivesec S.r.l. Cap the available length to the buffer size. Validate and consume the mode header and block descriptor lengths before using the page, and require the five bytes needed to access the CDL field.
In plain language
No plain-language summary for this CVE yet.
Exploitation
Where each signal puts this CVE on the scale from published to confirmed exploited.
- CISA KEV
Not in the catalog. CISA has not confirmed exploitation.
- Public exploits
No public exploit or proof of concept found in the sources we track.
- EPSS
0.2% chance of exploitation activity in the next 30 days, which ranks it in the 7th percentile of scored CVEs.
Exploit Prediction Scoring System, FIRST.org. A probability, not a confirmation.
Lifecycle
2 events over 0 days, from the signal feeds we watch.
- Publishedrecord updated
Affected products
Sources
References in the record
- git.kernel.org/stable/c/39491a1ae93054fea10b4030180e5c797b2c0343
- git.kernel.org/stable/c/60b0b8ce803e3c2b2a9e5485ab3f88599fb4c7a4
- git.kernel.org/stable/c/6233d0b3ef4623df0d6934dc8b93b161e9854f6b
And 2 more references. See all after sign-in
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