Skip to content
Noroxi
NVD / CVE Program· CNA Linux

CVE-2025-68820: ext4: xattr: fix null pointer deref in ext4_raw_inode()

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: 0.23% (FIRST EPSS).
  • Fixed version: Linux Linux 190ad0f22ba49f1101182b80e3af50ca2ddfe72f, 3d8d22e75f7edfa0b30ff27330fd6a1285d594c3, 5.10.248.

Low priority for now. Upgrade to Linux Linux 190ad0f22ba49f1101182b80e3af50ca2ddfe72f, 3d8d22e75f7edfa0b30ff27330fd6a1285d594c3, 5.10.248 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: xattr: fix null pointer deref in ext4_raw_inode() If ext4_get_inode_loc() fails (e.g. if it returns -EFSCORRUPTED), iloc.bh will remain set to NULL. Since ext4_xattr_inode_dec_ref_all() lacks error checking, this will lead to a null pointer dereference in ext4_raw_inode(), called right after ext4_get_inode_loc(). Found by Linux Verification Center (linuxtesting.org) with SVACE.

—No exploit Fix available
Published
Jan 13, 2026
Updated
Oct 19, 2026
EPSS
0.2% · 14th percentile

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%

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-2025-68820

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

One daily email digest (06:00 UTC); connect a webhook for KEV listings and weaponized exploits instantly.

Your free account also gets you

Running WordPress? Scan your site free with WP Lens

  • Stack alerts: add the products and versions you run, get the new CVEs that affect them
  • Uptime monitoring: 1 site, instant email when it goes down
  • Add your domain: subdomains and takeover risk scanned every week (1 domain)
  • 10 scans an hour on the security tools (3 a day without an account), an API key and MCP
  • All your scans in one panel: findings, what changed in the last scan, a report per domain or per client (PDF, share link)
All free tools

Sign up with email · Have an account? Sign in

Free account, no card. Unfollow any time.

Don't want an account? Get "Exploited this week" by email every MondayDon't want an account? RSS feed for linux records

Running WordPress? Scan your site free with WP Lens

Is your version affected? Check it

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.

We use this product, ask for help

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

    • 6aff941cb0f7d0c897c3698ad2e30672709135e3, 3bc6317033f365ce578eb6039445fb66162722fd, 836e625b03a666cf93ff5be328c8cb30336db872, 6.15affected
    • 76c365fa7e2a8bb85f0190cdb4b8cdc99b2fdce3 and later · before b72a3476f0c97d02f63a6e9fff127348d55436f6affected · git
    • f737418b6de31c962c7192777ee4018906975383 and later · before 3d8d22e75f7edfa0b30ff27330fd6a1285d594c3affected · git
    • cf9291a3449b04688b81e32621e88de8f4314b54 and later · before 190ad0f22ba49f1101182b80e3af50ca2ddfe72faffected · git
    • 362a90cecd36e8a5c415966d0b75b04a0270e4dd and later · before b5d942922182e82724b7152cb998f540132885ecaffected · git
    • eb59cc31b6ea076021d14b04e7faab1636b87d0e and later · before 5b154e901fda2e98570b8f426a481f5740097dc2affected · git
    • c8e008b60492cf6fd31ef127aea6d02fd3d314cd and later · before ce5f54c065a4a7cbb92787f4f140917112350142affected · git
    • c8e008b60492cf6fd31ef127aea6d02fd3d314cd and later · before b97cb7d6a051aa6ebd57906df0e26e9e36c26d14affected · git
    • 5.10.237 and later · before 5.10.248affected · semver
    • 5.15.181 and later · before 5.15.198affected · 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 6.18.3-16.18.3-1

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-2025-68818Jan 13, 2026 · scsi: Revert "scsi: qla2xxx: Perform lockless command completion in abort path"
    35Monitor
  • ← EarlierCVE-2025-68819Jan 13, 2026 · media: dvb-usb: dtv5100: fix out-of-bounds in dtv5100_i2c_msg()
    31Monitor
  • Later →CVE-2025-68822Jan 13, 2026 · Input: alps - fix use-after-free bugs caused by dev3_register_work
    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 Linux190ad0f22ba49f1101182b80e3af50ca2ddfe72fVendor (CNA)
Linux Linux3d8d22e75f7edfa0b30ff27330fd6a1285d594c3Vendor (CNA)
Linux Linux5.10.248Vendor (CNA)
Linux Linux5.15.198Vendor (CNA)
Linux Linux5.5Vendor (CNA)
Linux Linux5b154e901fda2e98570b8f426a481f5740097dc2Vendor (CNA)
Linux Linux6.1.160Vendor (CNA)
Linux Linux6.12.64Vendor (CNA)
Linux Linux6.14Vendor (CNA)
Linux Linux6.15Vendor (CNA)
Linux Linux6.6.120Vendor (CNA)
Linux Linuxb5d942922182e82724b7152cb998f540132885ecVendor (CNA)
Linux Linuxb72a3476f0c97d02f63a6e9fff127348d55436f6Vendor (CNA)
Linux Linuxb97cb7d6a051aa6ebd57906df0e26e9e36c26d14Vendor (CNA)
Linux Linuxce5f54c065a4a7cbb92787f4f140917112350142Vendor (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.

  • CVE-2026-68136209 days apartnet: gro: fix double aggregation of flush-marked skbs
    39Monitor
  • CVE-2026-68385209 days aparts390/checksum: Fix csum_partial() without vector facility
    39Monitor
  • CVE-2025-688180 days apartscsi: Revert "scsi: qla2xxx: Perform lockless command completion in abort path"
    35Monitor
  • CVE-2026-68354209 days apartfirewire: net: Fix fragmented datagram reassembly
    35Monitor
  • CVE-2026-72035214 days apartnet/sched: sch_taprio: Replace direct dequeue call with peek and qdisc_dequeue_peeked
    32Monitor
  • CVE-2026-68305209 days apartdrm/xe/vf: Add drm_dev guards when detaching CCS read/write buffers
    31Monitor

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)

CWE-476 · NULL Pointer Dereference

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 (8 more)

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

All records