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Review reviewHigh

CVE-2025-21650

Linux Linux, linux kernel

In the Linux kernel, the following vulnerability has been resolved: net: hns3: fixed hclge_fetch_pf_reg accesses bar space out of bounds issue The TQP BAR space is divided into two segments. TQPs 0-1023 and TQPs 1024-1279 are in different BAR space addresses. However, hclge_fetch_pf_reg does not distinguish the tqp space information when reading the tqp space information. When the number of TQPs is greater than 1024, access bar space overwriting occurs. The problem of different segments has been considered during the initialization of tqp.io_base. Therefore, tqp.io_base is directly used whe...

CVSS
7.8
EPSS
0.20%
9.61% percentile
CISA KEV
Not listed
Published
2025.01.19
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability0.20%
Technical severityCVSS 7.8

Vulnerability overview

In the Linux kernel, the following vulnerability has been resolved: net: hns3: fixed hclge_fetch_pf_reg accesses bar space out of bounds issue The TQP BAR space is divided into two segments. TQPs 0-1023 and TQPs 1024-1279 are in different BAR space addresses. However, hclge_fetch_pf_reg does not distinguish the tqp space information when reading the tqp space information. When the number of TQPs is greater than 1024, access bar space overwriting occurs. The problem of different segments has been considered during the initialization of tqp.io_base. Therefore, tqp.io_base is directly used whe...

Affected product and versions

Product
Linux Linux, linux kernel
Affected versions
>= 939ccd107ffcade20c9c7055a2e7ae0fd724fb72 < 0575baa733fc4219f230aef22d5bc35d922f1e9a, >= 939ccd107ffcade20c9c7055a2e7ae0fd724fb72 < 7997ddd46c54408bcba5e37fe18b4d832e45d4d4, >= df34972a33d268a7113c119fe4e4b07a6819aa0c, >= 2b1fff96a297034f03466cfecda9824adafe16ed, >= 6.4.16 < 6.5, >= 6.5.3 < 6.6, >= 6.6, >= 6.5.3 < 6.12.10, 6.13
Fixed versions
6.5, 6.12.10

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that Linux Linux, linux kernel and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE
CWE-787
CVE-2025-21650 — Linux Linux, linux kernel | SECUFOCUS NOW