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CVE-2026-98752

tty: port: fix tty_port_tty_vhangup() race

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, 20:55:32 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

10 ranges
Linux version evidence

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

affected

7ca0ff9ab3218ec443a7a9ad247e4650373ed41e → before a78910f6d78cc1415cbc9b4fb621c3f4f6945be2

git versions

7ca0ff9ab3218ec443a7a9ad247e4650373ed41e → before 2e16ae1464a4f435425c6f6ff1e293db850a624c

git versions

7ca0ff9ab3218ec443a7a9ad247e4650373ed41e → before a776d603d1e1bba2837295817b0a39394707b10d

git versions

7ca0ff9ab3218ec443a7a9ad247e4650373ed41e → before ce220b4cdf62f73db0c1940f968eb33b9899fdd0

git versions

7ca0ff9ab3218ec443a7a9ad247e4650373ed41e → before 6d1a984afc3ca477dab3e51ec806671d443ad524

git versions

7ca0ff9ab3218ec443a7a9ad247e4650373ed41e → before 6b7be3b9b857947e9c1338d4919d4ebd3b75e907

git versions

7ca0ff9ab3218ec443a7a9ad247e4650373ed41e → before 017b18addbe8dcace1a569a00d40ed1ba1e03f4c

git versions

7ca0ff9ab3218ec443a7a9ad247e4650373ed41e → before b48820de8c1a596c5b99775524dfce73c6576c5d

git versions

4260dc792fabfd20c8644fa9414b2ae48372365f

git versions

2.6.31.2 → before 2.6.32

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

2.6.32

unaffected

0 → before 2.6.32

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:

tty: port: fix tty_port_tty_vhangup() race

Drivers rely on tty_port_tty_vhangup() to synchronously hang up their ports before tearing down resources as part of deregistration (e.g. on physical disconnect).

If tty_port_tty_vhangup() races with another hangup it may however return before the port has been shut down. This is in turn can lead to use-after-free and NULL-pointer dereferences in racing ioctls (including a synchronous hangup) and in processing of racing asynchronous hangups (carrier loss).

Add the missing serialisation to tty_port_tty_vhangup() and tty_port_hangup() so that the former does not return until the port has been shut down also when there is a racing hangup.

Note that serial core does not use tty_port_hangup(), but it already holds the port mutex when clearing port->tty and shutting down the port in uart_hangup().

References

8 sources
git.kernel.org/stable/c/a78910f6d78cc1415cbc9b4fb621c3f4f6945be2
Source referenceLinux
git.kernel.org/stable/c/2e16ae1464a4f435425c6f6ff1e293db850a624c
Source referenceLinux
git.kernel.org/stable/c/a776d603d1e1bba2837295817b0a39394707b10d
Source referenceLinux
git.kernel.org/stable/c/ce220b4cdf62f73db0c1940f968eb33b9899fdd0
Source referenceLinux
git.kernel.org/stable/c/6d1a984afc3ca477dab3e51ec806671d443ad524
Source referenceLinux
git.kernel.org/stable/c/6b7be3b9b857947e9c1338d4919d4ebd3b75e907
Source referenceLinux
View 2 more references
git.kernel.org/stable/c/017b18addbe8dcace1a569a00d40ed1ba1e03f4c
Source referenceLinux
git.kernel.org/stable/c/b48820de8c1a596c5b99775524dfce73c6576c5d
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-2026-98752

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): 2.6.32

Before: 5.10.273

Vulnerable product

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

From (inclusive): 2.6.32

Before: 5.15.224

Vulnerable product

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

From (inclusive): 2.6.32

Before: 6.1.191

Vulnerable product

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

From (inclusive): 2.6.32

Before: 6.6.160

Vulnerable product

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

From (inclusive): 2.6.32

Before: 6.12.113

Vulnerable product

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

From (inclusive): 2.6.32

Before: 6.18.56

Vulnerable product

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

From (inclusive): 2.6.32

Before: 7.2.10

Vulnerable product

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

From (inclusive): 2.6.32

Before: 7.3

Vulnerable product

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

From (inclusive): 2.6.31.2

Applicability preview
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    "nodes": [
      {
        "operator": "OR",
        "negate": false,
        "cpeMatch": [
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            "vulnerable": true,
            "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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            "vulnerable": true,
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            "versionStartIncluding": "2.6.31.2"
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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.