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CVE-2026-93055· NVD / CVE Program· CNA Linux

UDF symlink pathComponent header OOB read

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 48b2a74317e15f93983c74a5a07245bc94a00d39, 57371e743398e0d485f0f7beede1ade41f812324, 8da8fd3df9fc14cf79ca3a3978d27ba067985111; azl3 kernel 6.6.152.1-1 on Azure Linux 3.0 6.6.157.1-1.

Low priority for now. Upgrade to Linux Linux 48b2a74317e15f93983c74a5a07245bc94a00d39, 57371e743398e0d485f0f7beede1ade41f812324, 8da8fd3df9fc14cf79ca3a3978d27ba067985111; azl3 kernel 6.6.152.1-1 on Azure Linux 3.0 6.6.157.1-1 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: UDF symlink pathComponent header OOB read udf_symlink_filler() can enter udf_pc_to_char() with a partial pathComponent header. Validate that enough input remains for a complete pathComponent header before accessing it. Reject malformed symlink data that would otherwise make udf_pc_to_char() perform an out-of-bounds read.

—No exploit Fix available
Published
Sep 17, 2026
Updated
Sep 17, 2026
EPSS
0.1% · 6th 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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Follow CVE-2026-93055

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

    • 2.6.12affected
    • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before d9f49c8b55debf1512f912077b6c759cc8b6d2e0affected · git
    • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before 48b2a74317e15f93983c74a5a07245bc94a00d39affected · git
    • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before f44f5f795f1a56249821a05183347ea025855e31affected · git
    • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before 57371e743398e0d485f0f7beede1ade41f812324affected · git
    • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before ee264227b656218bc1b257d8e4f83467f5f17723affected · git
    • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before 8da8fd3df9fc14cf79ca3a3978d27ba067985111affected · git
    • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before b21cb958292ee1e02eb305ff9de09f2f7edd551aaffected · git
    • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before d23eb7380d1594cda31a5dc8487dd2a5c8def8c7affected · git
    • before 2.6.12not 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-2026-93053Sep 17, 2026 · speakup: keyhelp: guard letter_offsets possible out-of-range indexing
    0Monitor
  • ← EarlierCVE-2026-93054Sep 17, 2026 · uio: Fix stale info pointer in failed registration path
    28Monitor
  • Later →CVE-2026-93056Sep 17, 2026 · usb: gadget: f_uac1_legacy: remove broken string configfs attributes
    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 Linux48b2a74317e15f93983c74a5a07245bc94a00d39Vendor (CNA)
Linux Linux57371e743398e0d485f0f7beede1ade41f812324Vendor (CNA)
Linux Linux8da8fd3df9fc14cf79ca3a3978d27ba067985111Vendor (CNA)
Linux Linuxb21cb958292ee1e02eb305ff9de09f2f7edd551aVendor (CNA)
Linux Linuxd23eb7380d1594cda31a5dc8487dd2a5c8def8c7Vendor (CNA)
Linux Linuxd9f49c8b55debf1512f912077b6c759cc8b6d2e0Vendor (CNA)
Linux Linuxee264227b656218bc1b257d8e4f83467f5f17723Vendor (CNA)
Linux Linuxf44f5f795f1a56249821a05183347ea025855e31Vendor (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 3.06.6.157.1-1 · Release NotesMicrosoft (MSRC)
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