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CVE-2026-45899· NVD / CVE Program· CNA Linux

ext4: drop extent cache when splitting extent fails

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: 0.16% (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 120c6bd7ca9d3e80a968b758cbb3fbd67570f132, 31bf37cf53ede8145e2bc62da803d4506da92975, 337506dc652383c80839edb8d8dcdd8ff2129b4f.

Low priority for now. Upgrade to Linux Linux 120c6bd7ca9d3e80a968b758cbb3fbd67570f132, 31bf37cf53ede8145e2bc62da803d4506da92975, 337506dc652383c80839edb8d8dcdd8ff2129b4f 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: drop extent cache when splitting extent fails When the split extent fails, we might leave some extents still being processed and return an error directly, which will result in stale extent entries remaining in the extent status tree. So drop all of the remaining potentially stale extents if the splitting fails.

MediumCVSS 5.5 · v3.1—No exploit Fix available
Published
May 27, 2026
Updated
Jun 25, 2026
EPSS
0.1% · 5th percentile
CWE
—

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%

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-2026-45899

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 kernel3.12 and later · before 5.10.253
  • linux linux kernel5.11 and later · before 5.15.203
  • linux linux kernel5.16 and later · before 6.6.130
  • linux linux kernel6.7 and later · before 6.12.75
  • linux linux kernel6.13 and later · before 6.18.14
  • linux linux kernel6.19 and later · before 6.19.4

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

    • 3.12affected
    • 107a7bd31ac003e42c0f966aa8e5b26947de6024 and later · before 6e54f8dfee359bbd58086c883ea8cffd5312999daffected · git
    • 107a7bd31ac003e42c0f966aa8e5b26947de6024 and later · before 337506dc652383c80839edb8d8dcdd8ff2129b4faffected · git
    • 107a7bd31ac003e42c0f966aa8e5b26947de6024 and later · before dc7c9b9d03a59a7fe483574531327e650a4b4adcaffected · git
    • 107a7bd31ac003e42c0f966aa8e5b26947de6024 and later · before 120c6bd7ca9d3e80a968b758cbb3fbd67570f132affected · git
    • 107a7bd31ac003e42c0f966aa8e5b26947de6024 and later · before 808f3191498f300174523c54cab101e18795ae4eaffected · git
    • 107a7bd31ac003e42c0f966aa8e5b26947de6024 and later · before 31bf37cf53ede8145e2bc62da803d4506da92975affected · git
    • 107a7bd31ac003e42c0f966aa8e5b26947de6024 and later · before 79b592e8f1b435796cbc2722190368e3e8ffd7a1affected · git
    • before 3.12not affected · semver
    • 5.10.253 and later · up to and including 5.10.*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:13linuxbefore 6.12.85-16.12.85-1
Debian:14linuxbefore 6.18.14-16.18.14-1

Same product

linux: all records

Other highest-scoring records for the same primary product.

  • 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
  • CVE-2016-5195Race condition in mm/gup.c in the Linux kernel 2.x through 4.x before 4.8.3 allows local users to gain privileges by leveraging incorrect haKEV
    83Now

Published before and after this one in the same product

  • ← EarlierCVE-2026-45896May 27, 2026 · mtd: intel-dg: Fix accessing regions before setting nregions
    31Monitor
  • ← EarlierCVE-2026-45897May 27, 2026 · netfilter: nft_counter: serialize reset with spinlock
    22Monitor
  • Later →CVE-2026-45900May 27, 2026 · crypto: caam - fix netdev memory leak in dpaa2_caam_probe
    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 Linux120c6bd7ca9d3e80a968b758cbb3fbd67570f132Vendor (CNA)
Linux Linux31bf37cf53ede8145e2bc62da803d4506da92975Vendor (CNA)
Linux Linux337506dc652383c80839edb8d8dcdd8ff2129b4fVendor (CNA)
Linux Linux6e54f8dfee359bbd58086c883ea8cffd5312999dVendor (CNA)
Linux Linux79b592e8f1b435796cbc2722190368e3e8ffd7a1Vendor (CNA)
Linux Linux808f3191498f300174523c54cab101e18795ae4eVendor (CNA)
Linux Linuxdc7c9b9d03a59a7fe483574531327e650a4b4adcVendor (CNA)
debian:linux6.12.85-1 · Debian:13Package 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

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)

—

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