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NVD / CVE Program· CNA Linux

CVE-2026-90420: nilfs2: fix infinite loop in nilfs_clean_segments()

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 1fc6df85b4954b6fda9c351843aaca3c06f66d8d, 217b967ad7887a3e1ebc08f46f6484e081acd4b4, 3bcdbdaac884a4baa59716cf9bd9470c75276e2d.

Low priority for now. Upgrade to Linux Linux 1fc6df85b4954b6fda9c351843aaca3c06f66d8d, 217b967ad7887a3e1ebc08f46f6484e081acd4b4, 3bcdbdaac884a4baa59716cf9bd9470c75276e2d 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: nilfs2: fix infinite loop in nilfs_clean_segments() syzbot reported a hung task in nilfs_transaction_begin(). This occurs because the cleaner ioctl falls into an infinite loop if nilfs_segctor_construct() repeatedly returns -EROFS (e.g. the device is remounted as read-only after an I/O error). Currently in nilfs_clean_segments(), if err is non-zero, it logs the error and sleeps but doesn't abort when it encounters a terminal error like -EROFS. This causes the thread to loop forever. Fix this by breaking out of the loop if nilfs_segctor_construct() returns -EROFS. This matches the behaviour in nilfs_segctor_write_out(), which also handles -EROFS.

—No exploit Fix available
Published
Sep 17, 2026
Updated
Oct 19, 2026
EPSS
0.2% · 12th 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%

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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

    • 2.6.30affected
    • 9ff05123e3bfbb1d2b68ba1d9bf1f7d1dffc1453 and later · before e3e9367dae1a6392cbb14ab0b2ab5edbf39735c3affected · git
    • 9ff05123e3bfbb1d2b68ba1d9bf1f7d1dffc1453 and later · before 217b967ad7887a3e1ebc08f46f6484e081acd4b4affected · git
    • 9ff05123e3bfbb1d2b68ba1d9bf1f7d1dffc1453 and later · before 3bcdbdaac884a4baa59716cf9bd9470c75276e2daffected · git
    • 9ff05123e3bfbb1d2b68ba1d9bf1f7d1dffc1453 and later · before d7afca8e4efbf4c455b4663c29ae59fde2f1b671affected · git
    • 9ff05123e3bfbb1d2b68ba1d9bf1f7d1dffc1453 and later · before c07e5ad6539e7e9350d5c65cbf8adb69d1711b15affected · git
    • 9ff05123e3bfbb1d2b68ba1d9bf1f7d1dffc1453 and later · before 1fc6df85b4954b6fda9c351843aaca3c06f66d8daffected · git
    • 9ff05123e3bfbb1d2b68ba1d9bf1f7d1dffc1453 and later · before 8cea0bc78ac64cb88da49c07f80bf2cf9fb7aff8affected · git
    • 9ff05123e3bfbb1d2b68ba1d9bf1f7d1dffc1453 and later · before ce5a5ad1a8330a2fcfdd9ec2ab341be739e89a18affected · git
    • before 2.6.30not affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.190-16.1.190-1
Debian:12linux-6.12before 6.12.111-1~deb12u16.12.111-1~deb12u1
Debian:13linuxbefore 6.12.111-16.12.111-1
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-2026-90418Sep 17, 2026 · nilfs2: fix BUG in nilfs_copy_dirty_pages() on dirty state mismatch
    0Monitor
  • ← EarlierCVE-2026-90419Sep 17, 2026 · nilfs2: prevent out-of-bounds read in super root block parsing
    28Monitor
  • Later →CVE-2026-90421Sep 17, 2026 · PCI: Fix UAF when probe runs concurrent to dyn ID removal
    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 Linux1fc6df85b4954b6fda9c351843aaca3c06f66d8dVendor (CNA)
Linux Linux217b967ad7887a3e1ebc08f46f6484e081acd4b4Vendor (CNA)
Linux Linux3bcdbdaac884a4baa59716cf9bd9470c75276e2dVendor (CNA)
Linux Linux8cea0bc78ac64cb88da49c07f80bf2cf9fb7aff8Vendor (CNA)
Linux Linuxc07e5ad6539e7e9350d5c65cbf8adb69d1711b15Vendor (CNA)
Linux Linuxce5a5ad1a8330a2fcfdd9ec2ab341be739e89a18Vendor (CNA)
Linux Linuxd7afca8e4efbf4c455b4663c29ae59fde2f1b671Vendor (CNA)
Linux Linuxe3e9367dae1a6392cbb14ab0b2ab5edbf39735c3Vendor (CNA)
debian:linux6.1.190-1 · Debian:12Package registry (OSV)
debian:linux6.12.111-1 · Debian:13Package registry (OSV)
debian:linux-6.126.12.111-1~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).

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✗ → ✓

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References

Show all references (7 more)

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

All records