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NVD / CVE Program· CNA Linux

CVE-2025-68794: iomap: adjust read range correctly for non-block-aligned positions

Noroxi assessment

Priority: Monitor (action score 39/100)

  • 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: 0.68% (FIRST EPSS); higher than 52.6% of all records.
  • Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
  • According to CISA the attack is automatable: targets can be found by mass scanning.
  • Fixed version: Linux Linux 12053695c8ef5410e8cc6c9ed4c0db9cd9c82b3e, 142194fb21afe964d2d194cab1fc357cbf87e899, 275b37a1e5c2c8abd313e8075f6aec9a349f291b; azl3 kernel 6.6.119.3-3 on Azure Linux 3.0 6.6.121.1-1.

Low priority for now. Upgrade to Linux Linux 12053695c8ef5410e8cc6c9ed4c0db9cd9c82b3e, 142194fb21afe964d2d194cab1fc357cbf87e899, 275b37a1e5c2c8abd313e8075f6aec9a349f291b; azl3 kernel 6.6.119.3-3 on Azure Linux 3.0 6.6.121.1-1 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: iomap: adjust read range correctly for non-block-aligned positions iomap_adjust_read_range() assumes that the position and length passed in are block-aligned. This is not always the case however, as shown in the syzbot generated case for erofs. This causes too many bytes to be skipped for uptodate blocks, which results in returning the incorrect position and length to read in. If all the blocks are uptodate, this underflows length and returns a position beyond the folio. Fix the calculation to also take into account the block offset when calculating how many bytes can be skipped for uptodate blocks.

CriticalCVSS 9.8 · v3.1—No exploit Fix available
Published
Jan 13, 2026
Updated
Oct 19, 2026
EPSS
0.6% · 52th percentile

Report tools

JSON

Action score

39

Monitor

Low priority for now.

CVSS
39 / 40 · 9.8 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.6%

CISA SSVC decision

Exploitation
none
Automatable
yes
Technical impact
total

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · Linux
9.8
NVD has not scored this yet; the score shown is the CNA’s.

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

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  • 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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  • 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

    • 4.19affected
    • 9dc55f1389f9569acf9659e58dd836a9c70df217 and later · before ce20f49ac9194cf81a77f01d1c316d7c17ae753caffected · git
    • 9dc55f1389f9569acf9659e58dd836a9c70df217 and later · before 275b37a1e5c2c8abd313e8075f6aec9a349f291baffected · git
    • 9dc55f1389f9569acf9659e58dd836a9c70df217 and later · before b8c9f25fd84328c5fcc4f70c6d1e8f1d4787eaacaffected · git
    • 9dc55f1389f9569acf9659e58dd836a9c70df217 and later · before 82b60ffbb532d919959702768dca04c3c0500ae5affected · git
    • 9dc55f1389f9569acf9659e58dd836a9c70df217 and later · before 12053695c8ef5410e8cc6c9ed4c0db9cd9c82b3eaffected · git
    • 9dc55f1389f9569acf9659e58dd836a9c70df217 and later · before 142194fb21afe964d2d194cab1fc357cbf87e899affected · git
    • 9dc55f1389f9569acf9659e58dd836a9c70df217 and later · before 7aa6bc3e8766990824f66ca76c19596ce10daf3eaffected · git
    • before 4.19not affected · semver
    • 5.10.267 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:12linuxbefore 6.1.187-16.1.187-1
Debian:13linuxbefore 6.12.69-16.12.69-1
Debian:14linuxbefore 6.18.3-16.18.3-1
openSUSE:Leap 16.0dtb-aarch64before 6.12.0-160000.28.16.12.0-160000.28.1
openSUSE:Leap 16.0kernel-64kbbefore 6.12.0-160000.28.16.12.0-160000.28.1
openSUSE:Leap 16.0kernel-azurebefore 6.12.0-160000.28.16.12.0-160000.28.1
openSUSE:Leap 16.0kernel-defaultbefore 6.12.0-160000.28.16.12.0-160000.28.1
openSUSE:Leap 16.0kernel-default-basebefore 6.12.0-160000.27.1.160000.2.86.12.0-160000.27.1.160000.2.8
openSUSE:Leap 16.0kernel-docsbefore 6.12.0-160000.28.16.12.0-160000.28.1
openSUSE:Leap 16.0kernel-kvmsmallbefore 6.12.0-160000.28.16.12.0-160000.28.1
openSUSE:Leap 16.0kernel-obs-buildbefore 6.12.0-160000.28.16.12.0-160000.28.1
openSUSE:Leap 16.0kernel-obs-qabefore 6.12.0-160000.28.16.12.0-160000.28.1
openSUSE:Leap 16.0kernel-rtbefore 6.12.0-160000.28.16.12.0-160000.28.1
openSUSE:Leap 16.0kernel-sourcebefore 6.12.0-160000.28.16.12.0-160000.28.1
openSUSE:Leap 16.0kernel-symsbefore 6.12.0-160000.28.16.12.0-160000.28.1
openSUSE:Leap 16.0kernel-zfcpdumpbefore 6.12.0-160000.28.16.12.0-160000.28.1
SUSE:Linux Enterprise Live Patching 15 SP7kernel-livepatch-SLE15-SP7-RT_Update_11before 1-150700.1.3.11-150700.1.3.1
SUSE:Linux Micro 6.1kernel-defaultbefore 6.4.0-41.16.4.0-41.1
SUSE:Linux Micro 6.1kernel-default-basebefore 6.4.0-41.1.21.186.4.0-41.1.21.18
SUSE:Linux Micro 6.1kernel-kvmsmallbefore 6.4.0-41.16.4.0-41.1
SUSE:Linux Micro 6.1kernel-rtbefore 6.4.0-41.16.4.0-41.1
SUSE:Linux Micro 6.1kernel-sourcebefore 6.4.0-41.16.4.0-41.1
SUSE:Linux Micro 6.1kernel-source-rtbefore 6.4.0-41.16.4.0-41.1
SUSE:Linux Micro 6.2gdk-pixbufbefore 2.42.12-160000.4.12.42.12-160000.4.1

+10

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-2025-68788Jan 13, 2026 · fsnotify: do not generate ACCESS/MODIFY events on child for special files
    0Monitor
  • ← EarlierCVE-2025-68793Jan 13, 2026 · drm/amdgpu: fix a job->pasid access race in gpu recovery
    31Monitor
  • Later →CVE-2025-68795Jan 13, 2026 · ethtool: Avoid overflowing userspace buffer on stats query
    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 Linux12053695c8ef5410e8cc6c9ed4c0db9cd9c82b3eVendor (CNA)
Linux Linux142194fb21afe964d2d194cab1fc357cbf87e899Vendor (CNA)
Linux Linux275b37a1e5c2c8abd313e8075f6aec9a349f291bVendor (CNA)
Linux Linux7aa6bc3e8766990824f66ca76c19596ce10daf3eVendor (CNA)
Linux Linux82b60ffbb532d919959702768dca04c3c0500ae5Vendor (CNA)
Linux Linuxb8c9f25fd84328c5fcc4f70c6d1e8f1d4787eaacVendor (CNA)
Linux Linuxce20f49ac9194cf81a77f01d1c316d7c17ae753cVendor (CNA)
azl3 kernel 6.6.119.3-3 on Azure Linux 3.06.6.121.1-1 · CBL-Mariner ReleasesMicrosoft (MSRC)
debian:linux6.1.187-1 · Debian:12Package registry (OSV)
opensuse:dtb-aarch646.12.0-160000.28.1 · openSUSE:Leap 16.0Package registry (OSV)
opensuse:kernel-64kb6.12.0-160000.28.1 · openSUSE:Leap 16.0Package registry (OSV)
opensuse:kernel-azure6.12.0-160000.28.1 · openSUSE:Leap 16.0Package registry (OSV)
opensuse:kernel-default6.12.0-160000.28.1 · openSUSE:Leap 16.0Package registry (OSV)
opensuse:kernel-default-base6.12.0-160000.27.1.160000.2.8 · openSUSE:Leap 16.0Package registry (OSV)
opensuse:kernel-docs6.12.0-160000.28.1 · openSUSE:Leap 16.0Package registry (OSV)
opensuse:kernel-kvmsmall6.12.0-160000.28.1 · openSUSE:Leap 16.0Package registry (OSV)
opensuse:kernel-obs-build6.12.0-160000.28.1 · openSUSE:Leap 16.0Package registry (OSV)
opensuse:kernel-obs-qa6.12.0-160000.28.1 · openSUSE:Leap 16.0Package registry (OSV)
opensuse:kernel-rt6.12.0-160000.28.1 · openSUSE:Leap 16.0Package registry (OSV)
opensuse:kernel-source6.12.0-160000.28.1 · openSUSE:Leap 16.0Package registry (OSV)
opensuse:kernel-syms6.12.0-160000.28.1 · openSUSE:Leap 16.0Package registry (OSV)
suse:gdk-pixbuf2.42.12-160000.4.1 · SUSE:Linux Micro 6.2Package registry (OSV)
suse:kernel-64kb6.12.0-160000.28.1 · SUSE:Linux Micro 6.2Package registry (OSV)
suse:kernel-default6.4.0-41.1 · SUSE:Linux Micro 6.1Package registry (OSV)
suse:kernel-default-base6.4.0-41.1.21.18 · SUSE:Linux Micro 6.1Package registry (OSV)
suse:kernel-kvmsmall6.4.0-41.1 · SUSE:Linux Micro 6.1Package registry (OSV)
suse:kernel-livepatch-SLE15-SP7-RT_Update_111-150700.1.3.1 · SUSE:Linux Enterprise Live Patching 15 SP7Package registry (OSV)
suse:kernel-obs-build6.12.0-160000.28.1 · SUSE:Linux Micro Extras 6.2Package registry (OSV)
suse:kernel-rt6.4.0-150700.7.37.2 · SUSE:Real Time Module 15 SP7Package registry (OSV)
suse:kernel-source6.4.0-41.1 · SUSE:Linux Micro 6.1Package registry (OSV)

+3

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-2026-63984187 days apartipv6: rpl: fix hdrlen overflow in ipv6_rpl_srh_decompress()
    39Monitor
  • CVE-2026-68158209 days apartlibceph: Fix multiplication overflow in decode_new_up_state_weight()
    39Monitor
  • CVE-2026-72014214 days apartdrbd: reject data replies with an out-of-range payload size
    39Monitor
  • CVE-2026-64522193 days apartnet/mlx5e: Fix eswitch mode block underflow on IPsec acquire SA
    35Monitor
  • CVE-2026-64598205 days apartsmb/client: Fix error code in smb2_aead_req_alloc()
    35Monitor
  • CVE-2026-68108209 days apartdrm/amdgpu/vce: fix integer overflow in image size
    35Monitor

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

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
high · data can be read
Integrity
high · data or configuration can be modified
Availability
high · the service can be disrupted
Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
High
Availability impact
High

Weakness class (CWE)

CWE-190 · Integer Overflow or Wraparound

CVSS vector

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

nvd-secondary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

ATT&CK techniques

—

Change log

  1. SSVC exploitation— → none
  2. 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