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Linux KernelOperating system · Linux

CVE-2024-27001

MEDIUM · 5.5 CVSS v3.1 Published 2024-05-01
Fix available
A fix is available. Upgrade to 4.19.313 / 5.4.275 or later.
See remediation →
57/100
Remediation priority · Elevated
Zero-click Patch available

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
In the Linux kernel, the following vulnerability has been resolved: comedi: vmk80xx: fix incomplete endpoint checking While vmk80xx does have endpoint checking implemented, some things can fall through the cracks. Depending on the hardware model, URBs can have either bulk or interrupt type, and current version of vmk80xx_find_usb_endpoints() function does not take that fully into account. While this warning does not seem to be too harmful, at the very least it will crash systems with 'panic_on_warn' set on them. Fix the issue found by Syzkaller [1] by somewhat simplifying the endpoint checking process with usb_find_common_endpoints() and ensuring that only expected endpoint types are present. This patch has not been tested on real hardware. [1] Syzkaller report: usb 1-1: BOGUS urb xfer, pipe 1 != type 3 WARNING: CPU: 0 PID: 781 at drivers/usb/core/urb.c:504 usb_submit_urb+0xc4e/0x18c0 drivers/usb/core/urb.c:503 ... Call Trace: <TASK> usb_start_wait_urb+0x113/0x520 drivers/usb/core/message.c:59 vmk80xx_reset_device drivers/comedi/drivers/vmk80xx.c:227 [inline] vmk80xx_auto_attach+0xa1c/0x1a40 drivers/comedi/drivers/vmk80xx.c:818 comedi_auto_config+0x238/0x380 drivers/comedi/drivers.c:1067 usb_probe_interface+0x5cd/0xb00 drivers/usb/core/driver.c:399 ... Similar issue also found by Syzkaller:

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis

A detailed technical summary for this CVE is being prepared.

Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.

NVD · CPE data
Linux KernelOperating system
Affected:>= 3.9, < 4.19.313>= 4.20, < 5.4.275>= 5.5, < 5.10.216>= 5.11, < 5.15.157>= 5.16, < 6.1.88>= 6.2, < 6.6.29>= 6.7, < 6.8.8= 6.9
Debian LinuxOperating system
Affected:= 10.0
FedoraOperating system
Affected:= 38= 39= 40

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

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

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

dbcve · scoped
Upgrade available Upgrade to 4.19.313 / 5.4.275 / 5.10.216 or later
Fixed in 4.19.3135.4.2755.10.216
Vendor patch git.kernel.org →
Recommended fix High confidence

Linux kernel >= 5.15.157 (LTS) or 5.10.216, 5.4.275, 4.19.313 depending on branch; Debian 10 requires kernel >= 5.10.216; Fedora 38/39/40 via standard dnf update

  1. 1. For Linux kernel from source: Apply vendor patch commit 3a63ae0348d990e137cca04eced5b08379969ea9, which replaces the incomplete endpoint checking in drivers/comedi/drivers/vmk80xx.c with proper use of usb_find_common_endpoints()
  2. 2. For Debian 10 (Buster): Upgrade the kernel package to a version incorporating the fix (check linux-image-* packages for version >= 5.10.216 or backported fix)
  3. 3. For Fedora 38/39/40: Run 'dnf update kernel' to install a kernel version containing the fix
  4. 4. After updating, reboot the system to load the fixed kernel
  5. 5. Verify the fix is applied by checking that the vmk80xx module loads without 'BOGUS urb xfer' warnings in dmesg
Caveat Kernel upgrades carry standard risk; ensure backups and test in non-production first; check for any custom vmk80xx driver modifications

Generated from the published advisory — verify against the referenced sources before acting.

We can perform the upgrade in your staging environment and verify nothing breaks — typical engagement from $1,600. Get the upgrade done

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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

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