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Review reviewHigh

CVE-2025-68800

Linux

In the Linux kernel, the following vulnerability has been resolved: mlxsw: spectrum_mr: Fix use-after-free when updating multicast route stats Cited commit added a dedicated mutex (instead of RTNL) to protect the multicast route list, so that it will not change while the driver periodically traverses it in order to update the kernel about multicast route stats that were queried from the device. One instance of list entry deletion (during route replace) was missed and it can result in a use-after-free [1]. Fix by acquiring the mutex before deleting the entry from the list and releasing it af...

CVSS
7.8
EPSS
0.13%
2.63% percentile
CISA KEV
Not listed
Published
2026.01.14
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability0.13%
Technical severityCVSS 7.8

Vulnerability overview

In the Linux kernel, the following vulnerability has been resolved: mlxsw: spectrum_mr: Fix use-after-free when updating multicast route stats Cited commit added a dedicated mutex (instead of RTNL) to protect the multicast route list, so that it will not change while the driver periodically traverses it in order to update the kernel about multicast route stats that were queried from the device. One instance of list entry deletion (during route replace) was missed and it can result in a use-after-free [1]. Fix by acquiring the mutex before deleting the entry from the list and releasing it af...

Affected product and versions

Product
Linux
Affected versions
>= f38656d067257cc43b652958dd154e1ab0773701 < b957366f5611bbaba03dd10ef861283347ddcc88, >= f38656d067257cc43b652958dd154e1ab0773701 < 6e367c361a523a4b54fe618215c64a0ee189caf0, >= f38656d067257cc43b652958dd154e1ab0773701 < 37ca08b35a27ce8fd8e74dd3fd2ae21c23b63b73, >= f38656d067257cc43b652958dd154e1ab0773701 < 5f2831fc593c2b2efbff7dd0dd7441cec76adcd5, >= f38656d067257cc43b652958dd154e1ab0773701 < 216afc198484fde110ebeafc017992266f4596ce, >= f38656d067257cc43b652958dd154e1ab0773701 < 4049a6ace209f4ed150429f86ae796d7d6a4c22b, >= f38656d067257cc43b652958dd154e1ab0773701 < 8ac1dacec458f55f871f7153242ed6ab60373b90, >= 5.7
Fixed versions
No verified fixed-version field is available yet

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that Linux 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
Not available
CVE-2025-68800 — Linux | SECUFOCUS NOW