CVE-2025-68763

Service interruption via scatterlist count wraparound

Published Jan 5, 2026 · Updated Jan 5, 2026

Buffer overflow in the StarFive crypto hash driver in Linux Kernel allows local users to interrupt service via an undersized scatterlist. The starfive_hash_digest function stores a negative sg_nents_for_len error in an unsigned scatterlist-count field, converting it into a large positive iteration count. Reachability requires the StarFive JH7110 crypto driver and a hash request whose declared byte count exceeds the supplied scatterlist.

CVSS severity5.5
Medium
EPSS probability0.20%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

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Summary

What happened

Buffer overflow in the StarFive crypto hash driver in Linux Kernel allows local users to interrupt service via an undersized scatterlist. The starfive_hash_digest function stores a negative sg_nents_for_len error in an unsigned scatterlist-count field, converting it into a large positive iteration count. Reachability requires the StarFive JH7110 crypto driver and a hash request whose declared byte count exceeds the supplied scatterlist.

The record

CVE
CVE-2025-68763
Published
Jan 5, 2026
Updated
Jan 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
T1499
Attack vector
Unavailable
Privileges
Unavailable

Timeline

How it unfolded

  1. Jan 5, 2026CVE publishedPublication date reported by the CVE source.
  2. Jan 5, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=6.5
  2. Affected versionversion=7883d1b28a2b0e62edcacea22de6b36a1918b15a <0c3854d65cc4402cb8c52d4d773450a06efecab6
  3. Affected versionversion=7883d1b28a2b0e62edcacea22de6b36a1918b15a <1af5c973dd744e29fa22121f43e8646b7a7a71a7
  4. Affected versionversion=7883d1b28a2b0e62edcacea22de6b36a1918b15a <9b3f71cf02e04cfaa482155e3078707fe7f8aef4
  5. Affected versionversion=7883d1b28a2b0e62edcacea22de6b36a1918b15a <e9eb52037a529fbb307c290e9951a62dd728b03d

What conditions does exploitation require?

Attack vectorUnavailable in this record.
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linux Kernelversion=6.5; version=7883d1b28a2b0e62edcacea22de6b36a1918b15a <0c3854d65cc4402cb8c52d4d773450a06efecab6; version=7883d1b28a2b0e62edcacea22de6b36a1918b15a <1af5c973dd744e29fa22121f43e8646b7a7a71a7; version=7883d1b28a2b0e62edcacea22de6b36a1918b15a <9b3f71cf02e04cfaa482155e3078707fe7f8aef4; version=7883d1b28a2b0e62edcacea22de6b36a1918b15a <e9eb52037a529fbb307c290e9951a62dd728b03d

Published CVSS scores

4.6TenableAV:L/AC:L/Au:S/C:N/I:N/A:C
5.5TenableCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
VectorUnavailable
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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