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CVE.org (no NVD analysis yet)· CNA Linux

CVE-2026-98752: tty: port: fix tty_port_tty_vhangup() race

Noroxi assessment

Priority: Monitor (action score 0/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.17% (FIRST EPSS).
  • Fixed version: Linux Linux 017b18addbe8dcace1a569a00d40ed1ba1e03f4c, 2.6.32, 2e16ae1464a4f435425c6f6ff1e293db850a624c; azl3 kernel 6.6.157.1-1 on Azure Linux 3.0 Release Notes; azl3 kernel 6.6.159.1-1 on Azure Linux 3.0 Release Notes.

Low priority for now. Upgrade to Linux Linux 017b18addbe8dcace1a569a00d40ed1ba1e03f4c, 2.6.32, 2e16ae1464a4f435425c6f6ff1e293db850a624c; azl3 kernel 6.6.157.1-1 on Azure Linux 3.0 Release Notes; azl3 kernel 6.6.159.1-1 on Azure Linux 3.0 Release Notes or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

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().

—No exploit Fix available
Published
Oct 18, 2026
Updated
Oct 30, 2026
EPSS
0.1% · 7th percentile
CWE
—

Report tools

JSON

Action score

0

Monitor

Low priority for now.

CVSS
0 / 40 · —
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.1%

Get told when this record changes

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  • No public exploit code on record
  • A fix has been released

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

—

Versions reported by the vendor

Affected version ranges reported by the assigning authority (Linux). Independent of NVD's CPE analysis and usually ahead of it.

  • Linux Linux

    • 4260dc792fabfd20c8644fa9414b2ae48372365f, 2.6.32affected
    • 7ca0ff9ab3218ec443a7a9ad247e4650373ed41e and later · before a78910f6d78cc1415cbc9b4fb621c3f4f6945be2affected · git
    • 7ca0ff9ab3218ec443a7a9ad247e4650373ed41e and later · before 2e16ae1464a4f435425c6f6ff1e293db850a624caffected · git
    • 7ca0ff9ab3218ec443a7a9ad247e4650373ed41e and later · before a776d603d1e1bba2837295817b0a39394707b10daffected · git
    • 7ca0ff9ab3218ec443a7a9ad247e4650373ed41e and later · before ce220b4cdf62f73db0c1940f968eb33b9899fdd0affected · git
    • 7ca0ff9ab3218ec443a7a9ad247e4650373ed41e and later · before 6d1a984afc3ca477dab3e51ec806671d443ad524affected · git
    • 7ca0ff9ab3218ec443a7a9ad247e4650373ed41e and later · before 6b7be3b9b857947e9c1338d4919d4ebd3b75e907affected · git
    • 7ca0ff9ab3218ec443a7a9ad247e4650373ed41e and later · before 017b18addbe8dcace1a569a00d40ed1ba1e03f4caffected · git
    • 7ca0ff9ab3218ec443a7a9ad247e4650373ed41e and later · before b48820de8c1a596c5b99775524dfce73c6576c5daffected · git
    • 2.6.31.2 and later · before 2.6.32affected · semver

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:12linuxfrom 0—
Debian:12linux-6.12before 6.12.113-1~deb12u16.12.113-1~deb12u1
Debian:13linuxbefore 6.12.113-16.12.113-1
Debian:14linuxbefore 7.2.10-17.2.10-1

Same product

linux: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-74705udp: fix potential use-after-free in tunnel segmentation
    40Plan
  • CVE-2026-74612veth: fix skb length accounting after XDP frag adjustment
    40Plan
  • CVE-2026-74475vxlan: use neigh_ha_snapshot() in route_shortcircuit()
    40Plan

Published before and after this one in the same product

  • ← EarlierCVE-2026-98750Oct 18, 2026 · tty: fix saved termios reset race
    0Monitor
  • ← EarlierCVE-2026-98751Oct 18, 2026 · tty: abort break signalling on hangup
    0Monitor
  • Later →CVE-2026-98753Oct 18, 2026 · tty: tty_port: restore TTY_IO_ERROR on activation failure
    0Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
Linux Linux017b18addbe8dcace1a569a00d40ed1ba1e03f4cVendor (CNA)
Linux Linux2.6.32Vendor (CNA)
Linux Linux2e16ae1464a4f435425c6f6ff1e293db850a624cVendor (CNA)
Linux Linux6b7be3b9b857947e9c1338d4919d4ebd3b75e907Vendor (CNA)
Linux Linux6d1a984afc3ca477dab3e51ec806671d443ad524Vendor (CNA)
Linux Linuxa776d603d1e1bba2837295817b0a39394707b10dVendor (CNA)
Linux Linuxa78910f6d78cc1415cbc9b4fb621c3f4f6945be2Vendor (CNA)
Linux Linuxb48820de8c1a596c5b99775524dfce73c6576c5dVendor (CNA)
Linux Linuxce220b4cdf62f73db0c1940f968eb33b9899fdd0Vendor (CNA)
azl3 kernel 6.6.157.1-1 on Azure Linux 3.0Release NotesMicrosoft (MSRC)
azl3 kernel 6.6.159.1-1 on Azure Linux 3.0Release NotesMicrosoft (MSRC)
debian:linux6.12.113-1 · Debian:13Package registry (OSV)
debian:linux-6.126.12.113-1~deb12u1 · Debian:12Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

  1. Published
  2. Fix recordedsame day
  3. TodayNov 6, 2026+19 d
EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

No CVSS vector for this record, so attack conditions can't be derived.

Weakness class (CWE)

—

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

  1. Exploit maturity— → none
  2. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (7 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

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