CVE-2026-97990Hinoki check available

Oversized RX operations via unchecked pull error

Published Sep 25, 2026 · Updated Sep 25, 2026

Signed-length conversion in the Linux 5.19 vDPA network simulator allows attackers to pass an oversized length into RX handling. The vdpa_sim_net worker adds a negative vringh_iov_pull_iotlb() result to an unsigned byte counter, then converts it to size_t for receive_filter() and vringh_iov_push_iotlb(). This requires an active vDPA simulator network queue and a failed TX pull; published material does not establish a narrower attacker privilege or a resulting crash, disclosure, or code execution.

CVSS severityUnavailable
Unscored
EPSS probability0.12%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Signed-length conversion in the Linux 5.19 vDPA network simulator allows attackers to pass an oversized length into RX handling. The vdpa_sim_net worker adds a negative vringh_iov_pull_iotlb() result to an unsigned byte counter, then converts it to size_t for receive_filter() and vringh_iov_push_iotlb(). This requires an active vDPA simulator network queue and a failed TX pull; published material does not establish a narrower attacker privilege or a resulting crash, disclosure, or code execution.

The record

CVE
CVE-2026-97990
Published
Sep 25, 2026
Updated
Sep 25, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
Unavailable
Privileges
Unavailable

Timeline

How it unfolded

  1. Sep 25, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 25, 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=5.19
  2. Affected versionversion=cfe226892913a448e83e7a19db93862baa3cb99c <0d195797a80b77f2ec56718cd26d3ee65d0093e8
  3. Affected versionversion=cfe226892913a448e83e7a19db93862baa3cb99c <2bbf1c1f69991e28787e02b0a2f826289d5fc730
  4. Affected versionversion=cfe226892913a448e83e7a19db93862baa3cb99c <3af20238a09ca180d66623e3bed16b64e9975f39
  5. Affected versionversion=cfe226892913a448e83e7a19db93862baa3cb99c <c001abcde865b74231da8f1412c3217dbf66781e

What conditions does exploitation require?

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

What is affected?

The Linux Kernel Organization · Linuxversion=5.19; version=cfe226892913a448e83e7a19db93862baa3cb99c <0d195797a80b77f2ec56718cd26d3ee65d0093e8; version=cfe226892913a448e83e7a19db93862baa3cb99c <2bbf1c1f69991e28787e02b0a2f826289d5fc730; version=cfe226892913a448e83e7a19db93862baa3cb99c <3af20238a09ca180d66623e3bed16b64e9975f39; version=cfe226892913a448e83e7a19db93862baa3cb99c <c001abcde865b74231da8f1412c3217dbf66781e

Published CVSS scores

No CVSS assessment is available in this record.

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.

Activity data is delayed. The latest report is Sep 28, 2026.

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No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
VectorUnavailable
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

No sourced classifications are available.

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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