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NVD / CVE Program· CNA Linux

CVE-2026-89837: f2fs: fix dentry folio leak in find_in_level

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: 0.22% (FIRST EPSS).
  • Fixed version: Linux Linux 3b8593f7965fcb22672d98b55ae2e9410ea3d9f7, 93a3e6a4c9e726a13a935963e8dc43d181db1527, aefb4b0f465b6f95fe02b52d1822a3fb4a9ae922; azl3 kernel 6.6.152.1-1 on Azure Linux 3.0 Release Notes; 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 3b8593f7965fcb22672d98b55ae2e9410ea3d9f7, 93a3e6a4c9e726a13a935963e8dc43d181db1527, aefb4b0f465b6f95fe02b52d1822a3fb4a9ae922; azl3 kernel 6.6.152.1-1 on Azure Linux 3.0 Release Notes; 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: f2fs: fix dentry folio leak in find_in_level find_in_level() gets a dentry folio with f2fs_find_data_folio() before calling find_in_block(). If find_in_block() returns an error, the function stores the error in res_folio and breaks out of the loop without dropping the dentry folio. This leaks the folio reference on the find_in_block() error path. Drop the dentry folio before returning the error to the caller.

—No exploit Fix available
Published
Sep 16, 2026
Updated
Oct 30, 2026
EPSS
0.2% · 13th 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 · 0.2%

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

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  • when exploit code appears or is weaponized
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  • 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

    • 5.11affected
    • 7ad08a58bf67594057362e45cbddd3e27e53e557 and later · before d2011b371fcb9247b2ef4ea2d852401a6c82ab88affected · git
    • 7ad08a58bf67594057362e45cbddd3e27e53e557 and later · before 3b8593f7965fcb22672d98b55ae2e9410ea3d9f7affected · git
    • 7ad08a58bf67594057362e45cbddd3e27e53e557 and later · before b6c0e77d950bf80ab357e2b4b9667f4389ed417caffected · git
    • 7ad08a58bf67594057362e45cbddd3e27e53e557 and later · before af9cc316d31371824de8d409260a2ab9759dd51caffected · git
    • 7ad08a58bf67594057362e45cbddd3e27e53e557 and later · before aefb4b0f465b6f95fe02b52d1822a3fb4a9ae922affected · git
    • 7ad08a58bf67594057362e45cbddd3e27e53e557 and later · before 93a3e6a4c9e726a13a935963e8dc43d181db1527affected · git
    • 7ad08a58bf67594057362e45cbddd3e27e53e557 and later · before cca7d3e30bf30333314e31bc70b9a739f1342167affected · git
    • before 5.11not affected · semver
    • 5.15.224 and later · up to and including 5.15.*not 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:12linux-6.12before 6.12.113-1~deb12u16.12.113-1~deb12u1
Debian:13linuxbefore 6.12.113-16.12.113-1
Debian:14linuxbefore 7.2.6-17.2.6-1

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-2026-89835Sep 16, 2026 · f2fs: avoid NULL checkpoint thread access in sysfs
    0Monitor
  • ← EarlierCVE-2026-89836Sep 16, 2026 · f2fs: fix folio_nr_pages() race after put in large folio invalidate
    31Monitor
  • Later →CVE-2026-89838Sep 16, 2026 · f2fs: limit recovery filename logging to stored length
    28Monitor

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 Linux3b8593f7965fcb22672d98b55ae2e9410ea3d9f7Vendor (CNA)
Linux Linux93a3e6a4c9e726a13a935963e8dc43d181db1527Vendor (CNA)
Linux Linuxaefb4b0f465b6f95fe02b52d1822a3fb4a9ae922Vendor (CNA)
Linux Linuxaf9cc316d31371824de8d409260a2ab9759dd51cVendor (CNA)
Linux Linuxb6c0e77d950bf80ab357e2b4b9667f4389ed417cVendor (CNA)
Linux Linuxcca7d3e30bf30333314e31bc70b9a739f1342167Vendor (CNA)
Linux Linuxd2011b371fcb9247b2ef4ea2d852401a6c82ab88Vendor (CNA)
azl3 kernel 6.6.150.1-1 on Azure Linux 3.0—Microsoft (MSRC)
azl3 kernel 6.6.152.1-1 on Azure Linux 3.0Release NotesMicrosoft (MSRC)
azl3 kernel 6.6.157.1-1 on Azure Linux 3.0Release NotesMicrosoft (MSRC)
azl3 kernel 6.6.159.1-1 on Azure Linux 3.06.6.161.1-1 · Release NotesMicrosoft (MSRC)
debian:linux6.12.113-1 · Debian:13Package registry (OSV)
debian:linux7.2.6-1 · Debian:14Package 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.

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.

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. Fix✗ → ✓

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

References

Show all references (6 more)

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

All records