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NVD / CVE Program· CNA Linux

CVE-2026-90434: isofs: release zisofs block pointer buffer head

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: 0.21% (FIRST EPSS).
  • Fixed version: Linux Linux 0c2c54a7d174edc845f7bae24179fe72a926d10f, 106e1a3b2b3454fbda63a59e9290cb9a253f81aa, 2f7dd9b86fe4076059e6a4a2a2c5d565afd76b9e.

Low priority for now. Upgrade to Linux Linux 0c2c54a7d174edc845f7bae24179fe72a926d10f, 106e1a3b2b3454fbda63a59e9290cb9a253f81aa, 2f7dd9b86fe4076059e6a4a2a2c5d565afd76b9e 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: isofs: release zisofs block pointer buffer head zisofs_fill_pages() reads the compressed block pointer table. The error paths release the current buffer_head, the loop also releases the old buffer_head when it advances. However, the success path leaves the last buffer_head referenced. Release it before returning success.

—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%

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.

Follow CVE-2026-90434

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

    • 2.6.33affected
    • 59bc055211b8d266ab6089158058bf8268e02006 and later · before dbcc7d1b818162aeab2e97fd217d86546d9fde15affected · git
    • 59bc055211b8d266ab6089158058bf8268e02006 and later · before ec33e6b7a1de20d7e623b12633191a855445657daffected · git
    • 59bc055211b8d266ab6089158058bf8268e02006 and later · before 0c2c54a7d174edc845f7bae24179fe72a926d10faffected · git
    • 59bc055211b8d266ab6089158058bf8268e02006 and later · before 5677737c2cedf417c0fcf61540b9cef0e62273d4affected · git
    • 59bc055211b8d266ab6089158058bf8268e02006 and later · before f2a1611065c700a374b31c5cc8a7587f5e3bfe73affected · git
    • 59bc055211b8d266ab6089158058bf8268e02006 and later · before 106e1a3b2b3454fbda63a59e9290cb9a253f81aaaffected · git
    • 59bc055211b8d266ab6089158058bf8268e02006 and later · before 3371d30a97a257b7b5f2c8009612e9d452180f0aaffected · git
    • 59bc055211b8d266ab6089158058bf8268e02006 and later · before 2f7dd9b86fe4076059e6a4a2a2c5d565afd76b9eaffected · git
    • before 2.6.33not 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-2026-90432Sep 17, 2026 · sched_ext: Abort directly from the hardlockup handler
    0Monitor
  • ← EarlierCVE-2026-90433Sep 17, 2026 · spi: oc-tiny: switch to managed controller allocation
    0Monitor
  • Later →CVE-2026-90435Sep 17, 2026 · RDMA/mlx5: Fix integer overflow of user QP buffer size
    31Monitor

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 Linux0c2c54a7d174edc845f7bae24179fe72a926d10fVendor (CNA)
Linux Linux106e1a3b2b3454fbda63a59e9290cb9a253f81aaVendor (CNA)
Linux Linux2f7dd9b86fe4076059e6a4a2a2c5d565afd76b9eVendor (CNA)
Linux Linux3371d30a97a257b7b5f2c8009612e9d452180f0aVendor (CNA)
Linux Linux5677737c2cedf417c0fcf61540b9cef0e62273d4Vendor (CNA)
Linux Linuxdbcc7d1b818162aeab2e97fd217d86546d9fde15Vendor (CNA)
Linux Linuxec33e6b7a1de20d7e623b12633191a855445657dVendor (CNA)
Linux Linuxf2a1611065c700a374b31c5cc8a7587f5e3bfe73Vendor (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