Skip to content
Noroxi
CVE.org (no NVD analysis yet)· CNA Linux

CVE-2026-98742: ALSA: seq: Serialize compat port-info ioctls

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 14e178c60ba1cea49186fcfccac93d66aa94e9e0, 2c0cce3a5a660270d65729b0f318d4e01470479d, 2db234e163f0d211b69a4eebbec8aacc5a54a80e; azl3 kernel 6.6.157.1-1 on Azure Linux 3.0 Release Notes.

Low priority for now. Upgrade to Linux Linux 14e178c60ba1cea49186fcfccac93d66aa94e9e0, 2c0cce3a5a660270d65729b0f318d4e01470479d, 2db234e163f0d211b69a4eebbec8aacc5a54a80e; azl3 kernel 6.6.157.1-1 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: 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.

—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

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2026-98742

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

One daily email digest (06:00 UTC); connect a webhook for KEV listings and weaponized exploits instantly.

Your free account also gets you

Running WordPress? Scan your site free with WP Lens

  • Stack alerts: add the products and versions you run, get the new CVEs that affect them
  • Uptime monitoring: 1 site, instant email when it goes down
  • Add your domain: subdomains and takeover risk scanned every week (1 domain)
  • 10 scans an hour on the security tools (3 a day without an account), an API key and MCP
  • All your scans in one panel: findings, what changed in the last scan, a report per domain or per client (PDF, share link)
All free tools

Sign up with email · Have an account? Sign in

Free account, no card. Unfollow any time.

Don't want an account? Get "Exploited this week" by email every MondayDon't want an account? RSS feed for linux records

Running WordPress? Scan your site free with WP Lens

Is your version affected? Check it

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.

We use this product, ask for help

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

    • d6693160906d55ba376bf0b88b7c129762170162, 02cbce8576a31df8fca54aaec91ee081076bd79d, 6aab3aa52366a0051e5abf8aae4616c42053fd8e, f8a38ab4cd9624fc5ac8a7f965c7b20f5b62c03c, 623e5c8ae32b39cc8baea83478695dc624935318, e4ff9f294629b65df3f7982cd4faf86b2856b9d7, c3162384aed4cfe3f1a1f40041f3ba8cd7704d88, 4.15affected
    • b3defb791b26ea0683a93a4f49c77ec45ec96f10 and later · before 14e178c60ba1cea49186fcfccac93d66aa94e9e0affected · git
    • b3defb791b26ea0683a93a4f49c77ec45ec96f10 and later · before 4980768c5d092493be0deb20d1ee86aa661466f8affected · git
    • b3defb791b26ea0683a93a4f49c77ec45ec96f10 and later · before 2c0cce3a5a660270d65729b0f318d4e01470479daffected · git
    • b3defb791b26ea0683a93a4f49c77ec45ec96f10 and later · before 2db234e163f0d211b69a4eebbec8aacc5a54a80eaffected · git
    • b3defb791b26ea0683a93a4f49c77ec45ec96f10 and later · before 413211dd31cb2ef2fc99fb0aa1a037a97509502caffected · git
    • b3defb791b26ea0683a93a4f49c77ec45ec96f10 and later · before fc5c52848e405b6efb073db5035bb9ebaed11ec4affected · git
    • b3defb791b26ea0683a93a4f49c77ec45ec96f10 and later · before 702d92f361f65d9698c473c7599d471395dc4341affected · git
    • b3defb791b26ea0683a93a4f49c77ec45ec96f10 and later · before 95b2e0361c88753afa030c10698be0a1a5b67650affected · git
    • 3.2.99 and later · before 3.3affected · 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-2026-98740Oct 18, 2026 · EDAC/altera: Drop __init from ECC setup paths for re-probe safety
    0Monitor
  • ← EarlierCVE-2026-98741Oct 18, 2026 · ALSA: ua101: reject mismatched capture/playback packet sizes
    0Monitor
  • Later →CVE-2026-98743Oct 18, 2026 · ASoC: codecs: rt1017-sdca-sdw: fix uninitialized stream_config->type
    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 Linux14e178c60ba1cea49186fcfccac93d66aa94e9e0Vendor (CNA)
Linux Linux2c0cce3a5a660270d65729b0f318d4e01470479dVendor (CNA)
Linux Linux2db234e163f0d211b69a4eebbec8aacc5a54a80eVendor (CNA)
Linux Linux3.17Vendor (CNA)
Linux Linux3.19Vendor (CNA)
Linux Linux3.3Vendor (CNA)
Linux Linux4.10Vendor (CNA)
Linux Linux4.15Vendor (CNA)
Linux Linux4.2Vendor (CNA)
Linux Linux4.5Vendor (CNA)
Linux Linux413211dd31cb2ef2fc99fb0aa1a037a97509502cVendor (CNA)
Linux Linux4980768c5d092493be0deb20d1ee86aa661466f8Vendor (CNA)
Linux Linux702d92f361f65d9698c473c7599d471395dc4341Vendor (CNA)
Linux Linux95b2e0361c88753afa030c10698be0a1a5b67650Vendor (CNA)
Linux Linuxfc5c52848e405b6efb073db5035bb9ebaed11ec4Vendor (CNA)
azl3 kernel 6.6.157.1-1 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 7, 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.

All records