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NVD / CVE Program· CNA Linux

CVE-2026-53242: ALSA: PCM: Fix wait queue list corruption in snd_pcm_drain() on linked streams

Noroxi assessment

Priority: Monitor (action score 31/100)

  • 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: 0.10% (FIRST EPSS).
  • Someone with local access to the system can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: Linux Linux 06eca2235a3fd281dddf25b0a97772b25b5bb573, 5.10.259, 6.1.176; azl3 kernel 6.6.141.1-1 on Azure Linux 3.0 6.6.143.1-1.

Low priority for now. Upgrade to Linux Linux 06eca2235a3fd281dddf25b0a97772b25b5bb573, 5.10.259, 6.1.176; azl3 kernel 6.6.141.1-1 on Azure Linux 3.0 6.6.143.1-1 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: PCM: Fix wait queue list corruption in snd_pcm_drain() on linked streams snd_pcm_drain() uses init_waitqueue_entry which does not clear entry.prev/next, and add_wait_queue with a conditional remove_wait_queue that is skipped when to_check is no longer in the group after concurrent UNLINK. The orphaned wait entry remains on the unlinked substream sleep queue. On the next drain iteration, add_wait_queue adds the entry to a new queue while still linked on the old one, corrupting both lists. A subsequent wake_up dereferences NULL at the func pointer (mapped from the spinlock at offset 0 of the misinterpreted wait_queue_head_t), causing a kernel panic. Replace init_waitqueue_entry/add_wait_queue/conditional remove_wait_queue with init_wait_entry/prepare_to_wait/ finish_wait. init_wait_entry clears prev/next via INIT_LIST_HEAD on each iteration and sets autoremove_wake_function which auto-removes the entry on wake-up. finish_wait safely handles both the already-removed and still-queued cases.

HighCVSS 7.8 · v3.1—No exploit Fix available
Published
Jun 25, 2026
Updated
Oct 19, 2026
EPSS
0.1% · 0th percentile

Report tools

JSON

Action score

31

Monitor

Low priority for now.

CVSS
31 / 40 · 7.8 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.1%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
total

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · Linux
7.8
NVD has not scored this yet; the score shown is the CNA’s.

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

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

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Follow CVE-2026-53242

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

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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.

VendorProduct
linuxlinux kernel

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • linux linux kernel5.10.253 and later · before 5.10.259
  • linux linux kernel6.1.167 and later · before 6.1.176
  • linux linux kernel6.6.130 and later · before 6.6.143
  • linux linux kernel6.12.78 and later · before 6.12.94
  • linux linux kernel6.18.19 and later · before 6.18.36
  • linux linux kernel6.19.9 and later · before 7.0
  • linux linux kernel7.0.1 and later · before 7.0.13
  • linux linux kernel7.0
  • linux linux kernel7.1

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

    • c2f64e05a0587a83ec42dbd6b7a7ded79b2ff694, 7.0affected
    • 9baee36e8c5443411c4629afabafaff8a46a23fd and later · before cac5bf3500ee6422cf64e0df0b5daeecfed42917affected · git
    • f2cb2e0d27fb925c73a78f0ce7d6dbf68d3747c1 and later · before 06eca2235a3fd281dddf25b0a97772b25b5bb573affected · git
    • fc71f888994569f87d5bee20b1ac6c9c1e3a7a79 and later · before d842f26a167e77a36f3ed333b9fa99d36ef99fe6affected · git
    • 629cf09464cf98670996ea5c191dc9743e6f3f00 and later · before d68b621bb5a48051932f1017a6e1bc9b18f854d0affected · git
    • ae8f8d30d334bad5b1b3cdb1eb8a0b771f55e432 and later · before b053fcd8912f06c30f932f5b8ec41c72de474695affected · git
    • 4a758e9a1f5ed722f83c4dd35f867fe811553bcb and later · before cd98837db15f323463b8df07282ac723bd5c3fedaffected · git
    • 9b1dbd69ba6f8f8c69bc7b77c2ce3b9c6ed05ba6 and later · before 7c71a9522555ff137a9ca36b15d759ca04d84788affected · git
    • 9b1dbd69ba6f8f8c69bc7b77c2ce3b9c6ed05ba6 and later · before 88fe2e3658726cb21ff2dcf9770bf672f9b9d31baffected · git
    • 5.10.253 and later · before 5.10.259affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.176-16.1.176-1
Debian:13linuxbefore 6.12.94-16.12.94-1
Debian:14linuxbefore 7.0.13-17.0.13-1

Same product

linux: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-31431crypto: algif_aead - Revert to operating out-of-placeKEV
    90Now
  • CVE-2022-0847A flaw was found in the way the "flags" member of the new pipe buffer structure was lacking proper initialization in copy_page_to_iter_pipe KEV
    89Now
  • CVE-2021-22555Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACEKEV
    85Now

Published before and after this one in the same product

  • ← EarlierCVE-2026-53239Jun 25, 2026 · xfrm: policy: fix use-after-free on inexact bin in xfrm_policy_bysel_ctx()
    31Monitor
  • ← EarlierCVE-2026-53241Jun 25, 2026 · ALSA: seq: dummy: fix UMP event stack overread
    22Monitor
  • Later →CVE-2026-53245Jun 25, 2026 · net/802/mrp: fix vector attribute parsing in mrp_pdu_parse_vecattr
    22Monitor

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 Linux06eca2235a3fd281dddf25b0a97772b25b5bb573Vendor (CNA)
Linux Linux5.10.259Vendor (CNA)
Linux Linux6.1.176Vendor (CNA)
Linux Linux6.12.94Vendor (CNA)
Linux Linux6.18.36Vendor (CNA)
Linux Linux6.20Vendor (CNA)
Linux Linux6.6.143Vendor (CNA)
Linux Linux7c71a9522555ff137a9ca36b15d759ca04d84788Vendor (CNA)
Linux Linux88fe2e3658726cb21ff2dcf9770bf672f9b9d31bVendor (CNA)
Linux Linuxb053fcd8912f06c30f932f5b8ec41c72de474695Vendor (CNA)
Linux Linuxcac5bf3500ee6422cf64e0df0b5daeecfed42917Vendor (CNA)
Linux Linuxcd98837db15f323463b8df07282ac723bd5c3fedVendor (CNA)
Linux Linuxd68b621bb5a48051932f1017a6e1bc9b18f854d0Vendor (CNA)
Linux Linuxd842f26a167e77a36f3ed333b9fa99d36ef99fe6Vendor (CNA)
azl3 kernel 6.6.141.1-1 on Azure Linux 3.06.6.143.1-1 · CBL-Mariner ReleasesMicrosoft (MSRC)
debian:linux6.1.176-1 · 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.

No dated events beyond publication.

No history yet (it accumulates with the daily EPSS job).

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

Attack conditions

  • Someone with local access to the system can trigger it.
  • A low-privileged account is enough.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
high · data can be read
Integrity
high · data or configuration can be modified
Availability
high · the service can be disrupted
Attack vector
Local
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
High
Availability impact
High

Weakness class (CWE)

CWE-476 · NULL Pointer Dereference

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

nvd-secondary

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. SSVC exploitation— → none
  2. Fix✗ → ✓

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

References

Show all references (8 more)

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

All records