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CVE-2026-93200

i3c: master: Fix use-after-free of master->this

Products / packages Linux

Published

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Severity and exploitation

Not in CISA KEVNo CVSS score

KEV coverage does not rule out exploitation.

KEV checked 14/11/2026, 21:25:33 UTC

Severity

unknown

CVSS measures technical severity, not the likelihood of an attack.

Known exploitation

Not listed in the checked CISA KEV catalog

Absence from CISA KEV does not rule out attacks.

Public exploit

Not established by this record

Missing evidence does not mean no public exploit exists.

Remediation

Fix status not established

No structured fix or guidance is available here. Check the latest publisher advisory.

What this means

In the Linux kernel, the following vulnerability has been resolved:

Source excerpt · Linux

Attack conditions

No attack-condition excerpt has been identified here. Review the full source description and references for authentication, network access, and configuration requirements.

Review supporting sources →

Affected versions

Check the exact model, release, and any platform requirements against your installation.

Linux · Linux

Linux

8 ranges
Linux version evidence

Compare with this publisher’s ranges. This does not inspect your installation.

affected

3a379bbcea0af6280e1ca0d1edfcf4e68cde6ee0 → before a9b9cae0bd887ef0d438887f20b0a417491e45f0

git versions

3a379bbcea0af6280e1ca0d1edfcf4e68cde6ee0 → before 94af669037d129914828a851d8b2a79b4537b73f

git versions

3a379bbcea0af6280e1ca0d1edfcf4e68cde6ee0 → before e766605a0490723df7b61e6abd0c392889732dd7

git versions

3a379bbcea0af6280e1ca0d1edfcf4e68cde6ee0 → before 027679d613ea73b8a00831369ec34eea804ce1bd

git versions

3a379bbcea0af6280e1ca0d1edfcf4e68cde6ee0 → before 23a1c4288a60e253a05a882bd8928ed61beb4a48

git versions

3a379bbcea0af6280e1ca0d1edfcf4e68cde6ee0 → before 4f3145db05fede36b35f8249b8acde5bd5d54864

git versions

3a379bbcea0af6280e1ca0d1edfcf4e68cde6ee0 → before 50034d8d0f797c3a7a599f750a7d3e792e80dea5

git versions

3a379bbcea0af6280e1ca0d1edfcf4e68cde6ee0 → before feb0ed76601f3c2f91f08688c5a7d8b9d382f720

git versions

unaffected

unknown

Other versions: unaffected

Linux · Linux

Linux

10 ranges
Linux version evidence

Compare with this publisher’s ranges. This does not inspect your installation.

affected

5.0

unaffected

0 → before 5.0

semver versions

5.10.273 → through 5.10.*

semver versions

5.15.224 → through 5.15.*

semver versions

6.1.191 → through 6.1.*

semver versions

6.6.160 → through 6.6.*

semver versions

6.12.112 → through 6.12.*

semver versions

6.18.52 → through 6.18.*

semver versions

7.2.6 → through 7.2.*

semver versions

7.3 → through *

original_commit_for_fix versions

unknown

Other versions: affected

Automatic dependency matching is unavailable for this record. Use the product evidence and publisher’s instructions to check your installation.

What to do

Compare your installed product and version with the affected versions above. A matching product name alone does not confirm exposure.

No structured fix or remediation guidance is available here. Check the full source description and vendor’s latest advisory for a patch or workaround; do not assume another version is safe.

cve.new guidance unless attributed to a publisher. This page does not inspect your installation.

Public exploit evidence

No public exploit reference is identified in the imported evidence. This is not a claim that no exploit exists.

Original source description

Read the full publisher description

In the Linux kernel, the following vulnerability has been resolved:

i3c: master: Fix use-after-free of master->this

sysfs attribute callbacks for the master controller device dereference master->this. However, master->this is freed in i3c_master_detach_free_devs() before the master device itself is released.

As a result, sysfs accesses can dereference a freed master->this pointer, leading to a use-after-free.

Keep master->this alive until i3c_masterdev_release(), which is called after the master device and its sysfs state are being torn down. Do not free master->this as part of the normal device detach path.

On the error path in i3c_master_set_info(), reset master->this and bus.cur_master to NULL before freeing the allocated device.

References

8 sources
git.kernel.org/stable/c/a9b9cae0bd887ef0d438887f20b0a417491e45f0
Source referenceLinux
git.kernel.org/stable/c/94af669037d129914828a851d8b2a79b4537b73f
Source referenceLinux
git.kernel.org/stable/c/e766605a0490723df7b61e6abd0c392889732dd7
Source referenceLinux
git.kernel.org/stable/c/027679d613ea73b8a00831369ec34eea804ce1bd
Source referenceLinux
git.kernel.org/stable/c/23a1c4288a60e253a05a882bd8928ed61beb4a48
Source referenceLinux
git.kernel.org/stable/c/4f3145db05fede36b35f8249b8acde5bd5d54864
Source referenceLinux
View 2 more references
git.kernel.org/stable/c/50034d8d0f797c3a7a599f750a7d3e792e80dea5
Source referenceLinux
git.kernel.org/stable/c/feb0ed76601f3c2f91f08688c5a7d8b9d382f720
Source referenceLinux

Inside the record

Evidence available

Package identity · not supplied
Version evidence
Remediation guidance · not supplied
Weakness classification · not supplied
Additional publishers · not supplied

Describes the evidence in this view, not whether the product is safe.

Original records

CVE-2026-93200

View the latest unmodified CVE JSON from the official source. It may be newer than this imported page.

cve.new JSON →

Environment requirements

These conditions apply together as specified by the publisher. A matching product name alone does not establish exposure.

Linux · platform conditions

Any condition may hold

Vulnerable product

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

From (inclusive): 5.0

Before: 5.10.273

Vulnerable product

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

From (inclusive): 5.0

Before: 5.15.224

Vulnerable product

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

From (inclusive): 5.0

Before: 6.1.191

Vulnerable product

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

From (inclusive): 5.0

Before: 6.6.160

Vulnerable product

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

From (inclusive): 5.0

Before: 6.12.112

Vulnerable product

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

From (inclusive): 5.0

Before: 6.18.52

Vulnerable product

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

From (inclusive): 5.0

Before: 7.2.6

Vulnerable product

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

From (inclusive): 5.0

Before: 7.3

Applicability preview
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  {
    "nodes": [
      {
        "operator": "OR",
        "negate": false,
        "cpeMatch": [
          {
            "vulnerable": true,
            "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
            "versionStartIncluding": "5.0",
            "versionEndExcluding": "5.10.273"
          },
          {
            "vulnerable": true,
            "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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          {
            "vulnerable": true,
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            "versionStartIncluding": "5.0",
            "versionEndExcluding": "6.18.52"
          },
          {
            "vulnerable": true,
            "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
            "versionStartIncluding": "5.0",
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          },
          {
            "vulnerable": true,
            "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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  }
]
Contributing organizations · 1
Linux

Assigning organization

2026-10-30

Timeline

All times UTC

  1. Advisory published

    Publication date supplied by the source.

  2. Source updated

    Latest modification date supplied by the source.

  3. Last imported by cve.new

    Latest catalog import, not the date we first saw this advisory.

What changed

Follow changes
No substantive changes have been recorded here yet. History starts when cve.new observes a change after tracking is enabled; earlier edits are not reconstructed.

Large field values are marked as truncated previews. Original source snapshots remain retained.