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NVD / CVE Program· CNA Linux

CVE-2026-23145: ext4: fix iloc.bh leak in ext4_xattr_inode_update_ref

Noroxi assessment

Priority: Monitor (action score 22/100)

  • 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: 0.14% (FIRST EPSS).
  • Someone with local access to the system can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: Linux Linux 06e26287f2e349a28ad363941ffd9076bfed8b2e, 0b06cde92f2f960f4ebe3c988c69f2711f2a24dc, 3b00c16e42428a1ecd3a5eb9cc37f8ad9bd47626.

Low priority for now. Upgrade to Linux Linux 06e26287f2e349a28ad363941ffd9076bfed8b2e, 0b06cde92f2f960f4ebe3c988c69f2711f2a24dc, 3b00c16e42428a1ecd3a5eb9cc37f8ad9bd47626 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: ext4: fix iloc.bh leak in ext4_xattr_inode_update_ref The error branch for ext4_xattr_inode_update_ref forget to release the refcount for iloc.bh. Find this when review code.

MediumCVSS 5.5 · v3.1—No exploit Fix available
Published
Feb 14, 2026
Updated
Oct 19, 2026
EPSS
0.1% · 3th percentile

Report tools

JSON

Action score

22

Monitor

Low priority for now.

CVSS
22 / 40 · 5.5 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.1%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

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-2026-23145

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.

VendorProduct
linuxlinux kernel

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • linux linux kernel5.4.301 and later · before 5.5
  • linux linux kernel5.10.246 and later · before 5.10.249
  • linux linux kernel5.15.195 and later · before 5.15.199
  • linux linux kernel6.1.157 and later · before 6.1.162
  • linux linux kernel6.6.113 and later · before 6.6.122
  • linux linux kernel6.12.54 and later · before 6.12.67
  • linux linux kernel6.17.4 and later · before 6.18.7
  • linux linux kernel6.19

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

    • ea39e712c2f5ae148ee5515798ae03523673e002, 440b003f449a4ff2a00b08c8eab9ba5cd28f3943, 6.18affected
    • 1cfb3e4ddbdc8e02e637b8852540bd4718bf4814 and later · before 7c9f059c3d531a12d7ad96cd34a44b8af7c00d5faffected · git
    • 505e69f76ac497e788f4ea0267826ec7266b40c8 and later · before 6241cd1d0acc2363016ac55b8773ba1332dd59d7affected · git
    • 3d6269028246f4484bfed403c947a114bb583631 and later · before 3b00c16e42428a1ecd3a5eb9cc37f8ad9bd47626affected · git
    • 79ea7f3e11effe1bd9e753172981d9029133a278 and later · before 0b06cde92f2f960f4ebe3c988c69f2711f2a24dcaffected · git
    • 6b879c4c6bbaab03c0ad2a983953bd1410bb165e and later · before 8e8542c539927ae3898a4d02941f84e252e2dea1affected · git
    • 57295e835408d8d425bef58da5253465db3d6888 and later · before 06e26287f2e349a28ad363941ffd9076bfed8b2eaffected · git
    • 57295e835408d8d425bef58da5253465db3d6888 and later · before d250bdf531d9cd4096fedbb9f172bb2ca660c868affected · git
    • 5.10.246 and later · before 5.10.249affected · semver
    • 5.15.195 and later · before 5.15.199affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.162-16.1.162-1
Debian:13linuxbefore 6.12.69-16.12.69-1
Debian:14linuxbefore 6.18.8-16.18.8-1

Same product

linux: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-31431crypto: algif_aead - Revert to operating out-of-placeKEV
    90Now
  • CVE-2022-0847A flaw was found in the way the "flags" member of the new pipe buffer structure was lacking proper initialization in copy_page_to_iter_pipe KEV
    89Now
  • CVE-2021-22555Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACEKEV
    85Now

Published before and after this one in the same product

  • ← EarlierCVE-2026-23143Feb 14, 2026 · virtio_net: Fix misalignment bug in struct virtnet_info
    22Monitor
  • ← EarlierCVE-2026-23144Feb 14, 2026 · mm/damon/sysfs: cleanup attrs subdirs on context dir setup failure
    22Monitor
  • Later →CVE-2026-23146Feb 14, 2026 · Bluetooth: hci_uart: fix null-ptr-deref in hci_uart_write_work
    22Monitor

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 Linux06e26287f2e349a28ad363941ffd9076bfed8b2eVendor (CNA)
Linux Linux0b06cde92f2f960f4ebe3c988c69f2711f2a24dcVendor (CNA)
Linux Linux3b00c16e42428a1ecd3a5eb9cc37f8ad9bd47626Vendor (CNA)
Linux Linux5.10.249Vendor (CNA)
Linux Linux5.15.199Vendor (CNA)
Linux Linux5.5Vendor (CNA)
Linux Linux6.1.162Vendor (CNA)
Linux Linux6.12.67Vendor (CNA)
Linux Linux6.18Vendor (CNA)
Linux Linux6.6.122Vendor (CNA)
Linux Linux6241cd1d0acc2363016ac55b8773ba1332dd59d7Vendor (CNA)
Linux Linux7c9f059c3d531a12d7ad96cd34a44b8af7c00d5fVendor (CNA)
Linux Linux8e8542c539927ae3898a4d02941f84e252e2dea1Vendor (CNA)
Linux Linuxd250bdf531d9cd4096fedbb9f172bb2ca660c868Vendor (CNA)
debian:linux6.1.162-1 · 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.

No history yet (it accumulates with the daily EPSS job).

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

Attack conditions

  • Someone with local access to the system can trigger it.
  • A low-privileged account is enough.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
none
Integrity
none
Availability
high · the service can be disrupted
Attack vector
Local
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality impact
None
Integrity impact
None
Availability impact
High

Weakness class (CWE)

CWE-401 · Missing Release of Memory after Effective Lifetime

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

nvd-primary

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