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NVD / CVE Program· CNA Linux

CVE-2026-68216: media: pwc: Return queued buffers on start_streaming() failure

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: 0.17% (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 0362ae30b61b3053ee3095c1b8f179197ec4f539, 5d7cc2634c3843a1414a0f6407aa17f1f91dee60, 975b2ee20e569d47821e4f6c9761b4664d48a6a4; azl3 kernel 6.6.143.1-1 on Azure Linux 3.0 6.6.150.1-1.
  • Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to Linux Linux 0362ae30b61b3053ee3095c1b8f179197ec4f539, 5d7cc2634c3843a1414a0f6407aa17f1f91dee60, 975b2ee20e569d47821e4f6c9761b4664d48a6a4; azl3 kernel 6.6.143.1-1 on Azure Linux 3.0 6.6.150.1-1 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: media: pwc: Return queued buffers on start_streaming() failure The vb2 framework hands buffers to the driver via buf_queue() before calling start_streaming(). If start_streaming() returns an error without first returning those buffers via vb2_buffer_done(), vb2_start_streaming() fires WARN_ON(owned_by_drv_count) and the queued buffers leak. pwc's start_streaming() had two early returns that hit this trap: -ENODEV when the USB device was already disconnected, and -ERESTARTSYS when mutex_lock_interruptible() was interrupted by a signal. Call the existing pwc_cleanup_queued_bufs() helper with VB2_BUF_STATE_QUEUED before returning (matching the state already used by the pwc_isoc_init() error path in the same function). This mirrors the uvcvideo fix in commit 4cf3b6fd54eb ("media: uvcvideo: Return queued buffers on start_streaming() failure").

HighCVSS 7.8 · v3.1—No exploit Fix available
Published
Aug 10, 2026
Updated
Oct 19, 2026
EPSS
0.1% · 7th 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

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

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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.

—

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

    • 3.5affected
    • ceede9fa8939e40ad0ddb4ad1355f45c6f1d3478 and later · before d552852bf76b7dfb35b4593fc874d8dd2f1b1bf3affected · git
    • ceede9fa8939e40ad0ddb4ad1355f45c6f1d3478 and later · before 0362ae30b61b3053ee3095c1b8f179197ec4f539affected · git
    • ceede9fa8939e40ad0ddb4ad1355f45c6f1d3478 and later · before fa78e590852751d3ad32f33f6b4e210fe6ccbe9baffected · git
    • ceede9fa8939e40ad0ddb4ad1355f45c6f1d3478 and later · before f2f9fcacd81953dde6cb86312ab13ca13e689664affected · git
    • ceede9fa8939e40ad0ddb4ad1355f45c6f1d3478 and later · before 5d7cc2634c3843a1414a0f6407aa17f1f91dee60affected · git
    • ceede9fa8939e40ad0ddb4ad1355f45c6f1d3478 and later · before cb16b79a2be2cec9c3ebe4147490817c4d8b1de3affected · git
    • ceede9fa8939e40ad0ddb4ad1355f45c6f1d3478 and later · before a4f8f629983f643333e49df90557805469bcbb25affected · git
    • ceede9fa8939e40ad0ddb4ad1355f45c6f1d3478 and later · before 975b2ee20e569d47821e4f6c9761b4664d48a6a4affected · git
    • before 3.5not affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.187-16.1.187-1
Debian:12linux-6.12before 6.12.101-1~deb12u16.12.101-1~deb12u1
Debian:13linuxbefore 6.12.101-16.12.101-1
Debian:14linuxbefore 7.1.6-17.1.6-1

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-2026-68211Aug 10, 2026 · media: stm32-dcmipp: Return queued buffers on start_streaming() failure
    0Monitor
  • ← EarlierCVE-2026-68213Aug 10, 2026 · media: rtl2832_sdr: Return queued buffers on start_streaming() failure
    31Monitor
  • Later →CVE-2026-68233Aug 10, 2026 · drm/vc4: Shut down BO cache timer before teardown
    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 Linux0362ae30b61b3053ee3095c1b8f179197ec4f539Vendor (CNA)
Linux Linux5d7cc2634c3843a1414a0f6407aa17f1f91dee60Vendor (CNA)
Linux Linux975b2ee20e569d47821e4f6c9761b4664d48a6a4Vendor (CNA)
Linux Linuxa4f8f629983f643333e49df90557805469bcbb25Vendor (CNA)
Linux Linuxcb16b79a2be2cec9c3ebe4147490817c4d8b1de3Vendor (CNA)
Linux Linuxd552852bf76b7dfb35b4593fc874d8dd2f1b1bf3Vendor (CNA)
Linux Linuxf2f9fcacd81953dde6cb86312ab13ca13e689664Vendor (CNA)
Linux Linuxfa78e590852751d3ad32f33f6b4e210fe6ccbe9bVendor (CNA)
azl3 kernel 6.6.143.1-1 on Azure Linux 3.06.6.150.1-1 · CBL-Mariner ReleasesMicrosoft (MSRC)
debian:linux6.1.187-1 · Debian:12Package registry (OSV)
debian:linux-6.126.12.101-1~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.

No dated events beyond publication.

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.

  • CVE-2026-682400 days apartdrm/gpusvm: publish dpagemap early to avoid device mapping leak on error
    35Monitor
  • CVE-2026-682130 days apartmedia: rtl2832_sdr: Return queued buffers on start_streaming() failure
    31Monitor
  • CVE-2026-682980 days apartdrm/xe/vm: Fix SVM leak on resv obj alloc failure in xe_vm_create()
    31Monitor
  • CVE-2026-6446316 days apartusb: typec: tcpci_rt1711h: unregister TCPCI port with devres
    31Monitor
  • CVE-2026-6448516 days apartALSA: compress: Fix task creation error unwind
    31Monitor
  • CVE-2026-23038191 days apartpnfs/flexfiles: Fix memory leak in nfs4_ff_alloc_deviceid_node()
    0Monitor

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).

National notice (Türkiye Cybersecurity Directorate / USOM)

Official security notices citing this record; remediation advice is on the agency's page.

All national notices →

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-401 · Missing Release of Memory after Effective Lifetime

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 (7 more)

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

All records