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NVD / CVE Program· CNA Linux

CVE-2026-68474: powerpc/spufs: fix out-of-bounds access in spufs_mem_mmap_access()

Noroxi assessment

Priority: Monitor (action score 31/100)

  • 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 3c1e92f75e11a11492b8cb901fceeb9f16ae6415, 47b87f469a35b5ffc81c16eee6b13a9b6c8d55c6, 4efa313b15925bdd864784865d6585174979294b.

Low priority for now. Upgrade to Linux Linux 3c1e92f75e11a11492b8cb901fceeb9f16ae6415, 47b87f469a35b5ffc81c16eee6b13a9b6c8d55c6, 4efa313b15925bdd864784865d6585174979294b 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: powerpc/spufs: fix out-of-bounds access in spufs_mem_mmap_access() spufs_mem_mmap_access() computes the local store offset as address - vma->vm_start, but bounds-checks it against vma->vm_end instead of the local store size. On 64-bit, offset is always well below vma->vm_end, so the clamp never fires and len stays unbounded against the LS_SIZE buffer returned by ctx->ops->get_ls(). Reject offsets at or beyond LS_SIZE and clamp len to the remaining space, mirroring the guard already used by spufs_mem_mmap_fault() and spufs_ps_fault().

HighCVSS 7.8 · v3.1—No exploit Fix available
Published
Aug 15, 2026
Updated
Aug 17, 2026
EPSS
0.1% · 5th percentile
CWE
—

Report tools

JSON

Action score

31

Monitor

Low priority for now.

CVSS
31 / 40 · 7.8 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.1%

CNA vs NVD score

NVD
—
CNA · Linux
7.8
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.

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-2026-68474

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.

—

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

    • 2.6.27affected
    • a352894d07059649398c4769dc8b645e1a1dad88 and later · before aa7aa8ba40c089762d821e3987aaae19e1f5705caffected · git
    • a352894d07059649398c4769dc8b645e1a1dad88 and later · before d479a7711f8ff127946467b910d947bd971b94edaffected · git
    • a352894d07059649398c4769dc8b645e1a1dad88 and later · before 9d3569bfdceda69d5ffd5148901e57b69954d9efaffected · git
    • a352894d07059649398c4769dc8b645e1a1dad88 and later · before d97a8f3668949a8a9d1f6202f8c53446f2d89aa7affected · git
    • a352894d07059649398c4769dc8b645e1a1dad88 and later · before 913feef74354c653f10ecd4631df7618a95c49c2affected · git
    • a352894d07059649398c4769dc8b645e1a1dad88 and later · before 3c1e92f75e11a11492b8cb901fceeb9f16ae6415affected · git
    • a352894d07059649398c4769dc8b645e1a1dad88 and later · before 4efa313b15925bdd864784865d6585174979294baffected · git
    • a352894d07059649398c4769dc8b645e1a1dad88 and later · before 47b87f469a35b5ffc81c16eee6b13a9b6c8d55c6affected · git
    • before 2.6.27not affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.180-16.1.180-1
Debian:13linuxbefore 6.12.100-16.12.100-1
Debian:14linuxbefore 7.1.5-17.1.5-1

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-2026-68469Aug 15, 2026 · wifi: mwifiex: fix permanently busy scans after multiple roam iterations
    0Monitor
  • ← EarlierCVE-2026-68473Aug 15, 2026 · powerpc/uaccess: correct check for CONFIG_PPC_E500 in mask_user_address()
    31Monitor
  • Later →CVE-2026-68475Aug 15, 2026 · reset: sunxi: fix memory region leak on ioremap failure
    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 Linux3c1e92f75e11a11492b8cb901fceeb9f16ae6415Vendor (CNA)
Linux Linux47b87f469a35b5ffc81c16eee6b13a9b6c8d55c6Vendor (CNA)
Linux Linux4efa313b15925bdd864784865d6585174979294bVendor (CNA)
Linux Linux913feef74354c653f10ecd4631df7618a95c49c2Vendor (CNA)
Linux Linux9d3569bfdceda69d5ffd5148901e57b69954d9efVendor (CNA)
Linux Linuxaa7aa8ba40c089762d821e3987aaae19e1f5705cVendor (CNA)
Linux Linuxd479a7711f8ff127946467b910d947bd971b94edVendor (CNA)
Linux Linuxd97a8f3668949a8a9d1f6202f8c53446f2d89aa7Vendor (CNA)
debian:linux6.1.180-1 · 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.

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.

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

Weakness class (CWE)

—

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/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.

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 (7 more)

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

All records