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NVD / CVE Program· CNA Linux

CVE-2025-68251: erofs: avoid infinite loops due to corrupted subpage compact indexes

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 6.6.160, 6.8, 8675447a8794983f2b7e694b378112772c17635e.

Low priority for now. Upgrade to Linux Linux 6.6.160, 6.8, 8675447a8794983f2b7e694b378112772c17635e 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: erofs: avoid infinite loops due to corrupted subpage compact indexes Robert reported an infinite loop observed by two crafted images. The root cause is that `clusterofs` can be larger than `lclustersize` for !NONHEAD `lclusters` in corrupted subpage compact indexes, e.g.: blocksize = lclustersize = 512 lcn = 6 clusterofs = 515 Move the corresponding check for full compress indexes to `z_erofs_load_lcluster_from_disk()` to also cover subpage compact compress indexes. It also fixes the position of `m->type >= Z_EROFS_LCLUSTER_TYPE_MAX` check, since it should be placed right after `z_erofs_load_{compact,full}_lcluster()`.

—No exploit Fix available
Published
Dec 16, 2025
Updated
Oct 21, 2026
EPSS
0.2% · 11th 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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  • A fix has been released

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Noroxi analysis

What does it mean in your environment?

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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

    • 22438a34d383ec2789eaf450728e38abc53051f8, 6.8affected
    • 3f691aa676f29586e83e6c032713554a290418c3 and later · before b18a82503a67a530d48f5a5b429e162749fe2c89affected · git
    • 8d2517aaeea3ab8651bb517bca8f3c8664d318ea and later · before dbfac1b85d0753996ddfef636934d431b588dd1faffected · git
    • 8d2517aaeea3ab8651bb517bca8f3c8664d318ea and later · before 8675447a8794983f2b7e694b378112772c17635eaffected · git
    • 8d2517aaeea3ab8651bb517bca8f3c8664d318ea and later · before e13d315ae077bb7c3c6027cc292401bc0f4ec683affected · git
    • 6.6.16 and later · before 6.6.160affected · semver
    • 6.7.4 and later · before 6.8affected · semver
    • before 6.8not affected · semver
    • 6.6.160 and later · up to and including 6.6.*not affected · semver
    • 6.12.91 and later · up to and including 6.12.*not affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:13linuxbefore 6.12.94-16.12.94-1
Debian:14linuxbefore 6.17.6-16.17.6-1

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-2025-68249Dec 16, 2025 · most: usb: hdm_probe: Fix calling put_device() before device initialization
    0Monitor
  • ← EarlierCVE-2025-68250Dec 16, 2025 · hung_task: fix warnings caused by unaligned lock pointers
    32Monitor
  • Later →CVE-2025-68252Dec 16, 2025 · misc: fastrpc: Fix dma_buf object leak in fastrpc_map_lookup
    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 Linux6.6.160Vendor (CNA)
Linux Linux6.8Vendor (CNA)
Linux Linux8675447a8794983f2b7e694b378112772c17635eVendor (CNA)
Linux Linuxb18a82503a67a530d48f5a5b429e162749fe2c89Vendor (CNA)
Linux Linuxdbfac1b85d0753996ddfef636934d431b588dd1fVendor (CNA)
Linux Linuxe13d315ae077bb7c3c6027cc292401bc0f4ec683Vendor (CNA)
debian:linux6.12.94-1 · 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.

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

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 (3 more)

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

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