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

CVE-2026-99067: btrfs: scrub: fix local_root reference leak in scrub_print_warning_inode()

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 12ba7d8b9cd45a2c6aa8f37c3f4b8a50422fb549, 1fd742c7479961da6d0bb794ef8ac6b7b9442847, 41cabfbf3532e2a2a17be9e4876042a5393b5c8d; azl3 kernel 6.6.157.1-1 on Azure Linux 3.0 Release Notes.
  • Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to Linux Linux 12ba7d8b9cd45a2c6aa8f37c3f4b8a50422fb549, 1fd742c7479961da6d0bb794ef8ac6b7b9442847, 41cabfbf3532e2a2a17be9e4876042a5393b5c8d; 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: btrfs: scrub: fix local_root reference leak in scrub_print_warning_inode() When paths_from_inode() fails, scrub_print_warning_inode() jumps to err without dropping the reference taken by btrfs_get_fs_root(), leaking a reference to the root every time path resolution fails while printing scrub warnings. Every other error and success path of the function drops the reference. Drop the reference on the paths_from_inode() failure path too.

—No exploit Fix available
Published
Oct 23, 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

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When you'll hear from us

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  • when exploit code appears or is weaponized
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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

    • 3.2affected
    • 558540c17771eaf89b1a3be39aa2c8bc837da1a6 and later · before caebda739a724f0db57753351c01eaf2bf610576affected · git
    • 558540c17771eaf89b1a3be39aa2c8bc837da1a6 and later · before fc6d6b17584de7fb616b011e01f008ec3328063faffected · git
    • 558540c17771eaf89b1a3be39aa2c8bc837da1a6 and later · before e8d5cdd2b2e88177334326b002a58a5fae6e380caffected · git
    • 558540c17771eaf89b1a3be39aa2c8bc837da1a6 and later · before 41cabfbf3532e2a2a17be9e4876042a5393b5c8daffected · git
    • 558540c17771eaf89b1a3be39aa2c8bc837da1a6 and later · before 452a435b74f7f598a343c51f7c89c5d2244384b6affected · git
    • 558540c17771eaf89b1a3be39aa2c8bc837da1a6 and later · before 12ba7d8b9cd45a2c6aa8f37c3f4b8a50422fb549affected · git
    • 558540c17771eaf89b1a3be39aa2c8bc837da1a6 and later · before a7e5992bc37088f9b00e531955022aef69de3dc7affected · git
    • 558540c17771eaf89b1a3be39aa2c8bc837da1a6 and later · before 1fd742c7479961da6d0bb794ef8ac6b7b9442847affected · git
    • before 3.2not affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxfrom 0—
Debian:13linuxbefore 6.12.113-16.12.113-1
Debian:14linuxbefore 7.2.11-17.2.11-1

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-2026-99065Oct 23, 2026 · cgroup/cpuset: Handle cpu hotplug race in guarantee_active_cpus()
    0Monitor
  • ← EarlierCVE-2026-99066Oct 23, 2026 · can: dev: init_can_skb(): restore skb header initialization
    0Monitor
  • Later →CVE-2026-99068Oct 23, 2026 · ALSA: ctxfi: Fix memory leakage when clearing DAO input mappers
    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 Linux12ba7d8b9cd45a2c6aa8f37c3f4b8a50422fb549Vendor (CNA)
Linux Linux1fd742c7479961da6d0bb794ef8ac6b7b9442847Vendor (CNA)
Linux Linux41cabfbf3532e2a2a17be9e4876042a5393b5c8dVendor (CNA)
Linux Linux452a435b74f7f598a343c51f7c89c5d2244384b6Vendor (CNA)
Linux Linuxa7e5992bc37088f9b00e531955022aef69de3dc7Vendor (CNA)
Linux Linuxcaebda739a724f0db57753351c01eaf2bf610576Vendor (CNA)
Linux Linuxe8d5cdd2b2e88177334326b002a58a5fae6e380cVendor (CNA)
Linux Linuxfc6d6b17584de7fb616b011e01f008ec3328063fVendor (CNA)
azl3 kernel 6.6.157.1-1 on Azure Linux 3.0Release NotesMicrosoft (MSRC)
debian:linux6.12.113-1 · Debian:13Package 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 2, 2026+10 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).

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

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 (4 more)

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

All records