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CVE-2026-98742

ALSA: seq: Serialize compat port-info ioctls

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

22 ranges
Linux version evidence

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

affected

b3defb791b26ea0683a93a4f49c77ec45ec96f10 → before 14e178c60ba1cea49186fcfccac93d66aa94e9e0

git versions

b3defb791b26ea0683a93a4f49c77ec45ec96f10 → before 4980768c5d092493be0deb20d1ee86aa661466f8

git versions

b3defb791b26ea0683a93a4f49c77ec45ec96f10 → before 2c0cce3a5a660270d65729b0f318d4e01470479d

git versions

b3defb791b26ea0683a93a4f49c77ec45ec96f10 → before 2db234e163f0d211b69a4eebbec8aacc5a54a80e

git versions

b3defb791b26ea0683a93a4f49c77ec45ec96f10 → before 413211dd31cb2ef2fc99fb0aa1a037a97509502c

git versions

b3defb791b26ea0683a93a4f49c77ec45ec96f10 → before fc5c52848e405b6efb073db5035bb9ebaed11ec4

git versions

b3defb791b26ea0683a93a4f49c77ec45ec96f10 → before 702d92f361f65d9698c473c7599d471395dc4341

git versions

b3defb791b26ea0683a93a4f49c77ec45ec96f10 → before 95b2e0361c88753afa030c10698be0a1a5b67650

git versions

d6693160906d55ba376bf0b88b7c129762170162

git versions

02cbce8576a31df8fca54aaec91ee081076bd79d

git versions

6aab3aa52366a0051e5abf8aae4616c42053fd8e

git versions

f8a38ab4cd9624fc5ac8a7f965c7b20f5b62c03c

git versions

623e5c8ae32b39cc8baea83478695dc624935318

git versions

e4ff9f294629b65df3f7982cd4faf86b2856b9d7

git versions

c3162384aed4cfe3f1a1f40041f3ba8cd7704d88

git versions

3.2.99 → before 3.3

semver versions

3.16.54 → before 3.17

semver versions

3.18.94 → before 3.19

semver versions

4.1.50 → before 4.2

semver versions

4.4.115 → before 4.5

semver versions

4.9.78 → before 4.10

semver versions

4.14.15 → before 4.15

semver 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

4.15

unaffected

0 → before 4.15

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

6.12.113 → through 6.12.*

semver versions

6.18.56 → through 6.18.*

semver versions

7.2.10 → 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:

ALSA: seq: Serialize compat port-info ioctls

The native sequencer ioctl path serializes handler calls with client->ioctl_mutex, but the translated port-info compat path invokes the same handlers through snd_seq_kernel_client_ctl() without taking that mutex.

This lets concurrent compat CREATE_PORT requests pass the port-count check before any request reaches the serialized insertion. The computed integer port index can then exceed the address field range and wrap to an existing index. Subsequent subscriber teardown can resolve the duplicate address to the wrong port and access a freed subscriber.

Take ioctl_mutex while dispatching converted port-info requests, matching the native ioctl path. All translated port-info commands share this helper, so their accesses to the client port state are serialized as well.

References

8 sources
git.kernel.org/stable/c/14e178c60ba1cea49186fcfccac93d66aa94e9e0
Source referenceLinux
git.kernel.org/stable/c/4980768c5d092493be0deb20d1ee86aa661466f8
Source referenceLinux
git.kernel.org/stable/c/2c0cce3a5a660270d65729b0f318d4e01470479d
Source referenceLinux
git.kernel.org/stable/c/2db234e163f0d211b69a4eebbec8aacc5a54a80e
Source referenceLinux
git.kernel.org/stable/c/413211dd31cb2ef2fc99fb0aa1a037a97509502c
Source referenceLinux
git.kernel.org/stable/c/fc5c52848e405b6efb073db5035bb9ebaed11ec4
Source referenceLinux
View 2 more references
git.kernel.org/stable/c/702d92f361f65d9698c473c7599d471395dc4341
Source referenceLinux
git.kernel.org/stable/c/95b2e0361c88753afa030c10698be0a1a5b67650
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-2026-98742

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): 4.15

Before: 5.10.273

Vulnerable product

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

From (inclusive): 4.15

Before: 5.15.224

Vulnerable product

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

From (inclusive): 4.15

Before: 6.1.191

Vulnerable product

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

From (inclusive): 4.15

Before: 6.6.160

Vulnerable product

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

From (inclusive): 4.15

Before: 6.12.113

Vulnerable product

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

From (inclusive): 4.15

Before: 6.18.56

Vulnerable product

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

From (inclusive): 4.15

Before: 7.2.10

Vulnerable product

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

From (inclusive): 4.15

Before: 7.3

Vulnerable product

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

From (inclusive): 3.2.99

Vulnerable product

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

From (inclusive): 3.16.54

Vulnerable product

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

From (inclusive): 3.18.94

Vulnerable product

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

From (inclusive): 4.1.50

Vulnerable product

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

From (inclusive): 4.4.115

Vulnerable product

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

From (inclusive): 4.9.78

Vulnerable product

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

From (inclusive): 4.14.15

Applicability preview
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            "vulnerable": true,
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            "versionStartIncluding": "3.2.99"
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            "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
            "versionStartIncluding": "3.16.54"
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            "vulnerable": true,
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            "versionStartIncluding": "3.18.94"
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            "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
            "versionStartIncluding": "4.4.115"
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          {
            "vulnerable": true,
            "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
            "versionStartIncluding": "4.9.78"
          },
          {
            "vulnerable": true,
            "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
            "versionStartIncluding": "4.14.15"
          }
        ]
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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.