CVE-2025-38568

Summary

In the Linux kernel, the following vulnerability has been resolved:

net/sched: mqprio: fix stack out-of-bounds write in tc entry parsing

TCA_MQPRIO_TC_ENTRY_INDEX is validated using NLA_POLICY_MAX(NLA_U32, TC_QOPT_MAX_QUEUE), which allows the value TC_QOPT_MAX_QUEUE (16). This leads to a 4-byte out-of-bounds stack write in the fp[] array, which only has room for 16 elements (0–15).

Fix this by changing the policy to allow only up to TC_QOPT_MAX_QUEUE - 1.

Affected Software

VendorProductVersion RangeStatus
LinuxLinuxf62af20bed2d9e824f51cfc97ff01bc261f40e58 < 39491e859fd494d0b51adc5c7d54c8a7dcf1d198affected
LinuxLinuxf62af20bed2d9e824f51cfc97ff01bc261f40e58 < d00e4125680f7074c4f42ce3c297336f23128e70affected
LinuxLinuxf62af20bed2d9e824f51cfc97ff01bc261f40e58 < 66fc2ebdd9d5dd6e5a9c7edeace5a61a0ab2cd86affected
LinuxLinuxf62af20bed2d9e824f51cfc97ff01bc261f40e58 < f1a9dbcb7d17bf0abb325cdc984957cfabc59693affected
LinuxLinuxf62af20bed2d9e824f51cfc97ff01bc261f40e58 < ffd2dc4c6c49ff4f1e5d34e454a6a55608104c17affected
LinuxLinux6.4affected
LinuxLinux0 < 6.4unaffected
LinuxLinux6.6.102 <= 6.6.*unaffected
LinuxLinux6.12.42 <= 6.12.*unaffected
LinuxLinux6.15.10 <= 6.15.*unaffected
LinuxLinux6.16.1 <= 6.16.*unaffected
LinuxLinux6.17 <= *unaffected

Weaknesses

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: no
    • Technical Impact: total

References