CVE-2021-47548

Summary

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

ethernet: hisilicon: hns: hns_dsaf_misc: fix a possible array overflow in hns_dsaf_ge_srst_by_port()

The if statement: if (port >= DSAF_GE_NUM) return;

limits the value of port less than DSAF_GE_NUM (i.e., 8). However, if the value of port is 6 or 7, an array overflow could occur: port_rst_off = dsaf_dev->mac_cb[port]->port_rst_off;

because the length of dsaf_dev->mac_cb is DSAF_MAX_PORT_NUM (i.e., 6).

To fix this possible array overflow, we first check port and if it is greater than or equal to DSAF_MAX_PORT_NUM, the function returns.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux850bfa3b78ea8849fef78ed74f5f2ccf947db0ca < 948968f8747650447c8f21c9fdba0e1973be040baffected
LinuxLinux850bfa3b78ea8849fef78ed74f5f2ccf947db0ca < abbd5faa0748d0aa95d5191d56ff7a17a6275bd1affected
LinuxLinux850bfa3b78ea8849fef78ed74f5f2ccf947db0ca < dd07f8971b81ad98cc754b179b331b57f35aa1ffaffected
LinuxLinux850bfa3b78ea8849fef78ed74f5f2ccf947db0ca < 99bb25cb6753beaf2c2bc37927c2ecc0ceff3f6daffected
LinuxLinux850bfa3b78ea8849fef78ed74f5f2ccf947db0ca < 22519eff7df2d88adcc2568d86046ce1e2b52803affected
LinuxLinux850bfa3b78ea8849fef78ed74f5f2ccf947db0ca < fc7ffa7f10b9454a86369405d9814bf141b30627affected
LinuxLinux850bfa3b78ea8849fef78ed74f5f2ccf947db0ca < a66998e0fbf213d47d02813b9679426129d0d114affected
LinuxLinux4.7affected
LinuxLinux0 < 4.7unaffected
LinuxLinux4.9.292 <= 4.9.*unaffected
LinuxLinux4.14.257 <= 4.14.*unaffected
LinuxLinux4.19.220 <= 4.19.*unaffected
LinuxLinux5.4.164 <= 5.4.*unaffected
LinuxLinux5.10.84 <= 5.10.*unaffected
LinuxLinux5.15.7 <= 5.15.*unaffected
LinuxLinux5.16 <= *unaffected

Weaknesses

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: yes
    • Technical Impact: total

CVE Program Container

Additional References

References