{"id":"CVE-2021-47548","state":"PUBLISHED","title":"ethernet: hisilicon: hns: hns_dsaf_misc: fix a possible array overflow in hns_dsaf_ge_srst_by_port()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nethernet: hisilicon: hns: hns_dsaf_misc: fix a possible array overflow in hns_dsaf_ge_srst_by_port()\n\nThe if statement:\n  if (port >= DSAF_GE_NUM)\n        return;\n\nlimits the value of port less than DSAF_GE_NUM (i.e., 8).\nHowever, if the value of port is 6 or 7, an array overflow could occur:\n  port_rst_off = dsaf_dev->mac_cb[port]->port_rst_off;\n\nbecause the length of dsaf_dev->mac_cb is DSAF_MAX_PORT_NUM (i.e., 6).\n\nTo fix this possible array overflow, we first check port and if it is\ngreater than or equal to DSAF_MAX_PORT_NUM, the function returns.","publishedAt":"2024-05-24T15:09:52.634Z","updatedAt":"2026-05-11T13:56:45.302Z","severity":{"score":9.8,"label":"Critical","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","source":"CISA-ADP"},"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"850bfa3b78ea8849fef78ed74f5f2ccf947db0ca","status":"affected","lessThan":"948968f8747650447c8f21c9fdba0e1973be040b","versionType":"git"},{"version":"850bfa3b78ea8849fef78ed74f5f2ccf947db0ca","status":"affected","lessThan":"abbd5faa0748d0aa95d5191d56ff7a17a6275bd1","versionType":"git"},{"version":"850bfa3b78ea8849fef78ed74f5f2ccf947db0ca","status":"affected","lessThan":"dd07f8971b81ad98cc754b179b331b57f35aa1ff","versionType":"git"},{"version":"850bfa3b78ea8849fef78ed74f5f2ccf947db0ca","status":"affected","lessThan":"99bb25cb6753beaf2c2bc37927c2ecc0ceff3f6d","versionType":"git"},{"version":"850bfa3b78ea8849fef78ed74f5f2ccf947db0ca","status":"affected","lessThan":"22519eff7df2d88adcc2568d86046ce1e2b52803","versionType":"git"},{"version":"850bfa3b78ea8849fef78ed74f5f2ccf947db0ca","status":"affected","lessThan":"fc7ffa7f10b9454a86369405d9814bf141b30627","versionType":"git"},{"version":"850bfa3b78ea8849fef78ed74f5f2ccf947db0ca","status":"affected","lessThan":"a66998e0fbf213d47d02813b9679426129d0d114","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/ethernet/hisilicon/hns/hns_dsaf_misc.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"4.7","status":"affected"},{"version":"0","status":"unaffected","lessThan":"4.7","versionType":"semver"},{"version":"4.9.292","status":"unaffected","lessThanOrEqual":"4.9.*","versionType":"semver"},{"version":"4.14.257","status":"unaffected","lessThanOrEqual":"4.14.*","versionType":"semver"},{"version":"4.19.220","status":"unaffected","lessThanOrEqual":"4.19.*","versionType":"semver"},{"version":"5.4.164","status":"unaffected","lessThanOrEqual":"5.4.*","versionType":"semver"},{"version":"5.10.84","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.7","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"5.16","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/ethernet/hisilicon/hns/hns_dsaf_misc.c"]}],"references":["https://git.kernel.org/stable/c/948968f8747650447c8f21c9fdba0e1973be040b","https://git.kernel.org/stable/c/abbd5faa0748d0aa95d5191d56ff7a17a6275bd1","https://git.kernel.org/stable/c/dd07f8971b81ad98cc754b179b331b57f35aa1ff","https://git.kernel.org/stable/c/99bb25cb6753beaf2c2bc37927c2ecc0ceff3f6d","https://git.kernel.org/stable/c/22519eff7df2d88adcc2568d86046ce1e2b52803","https://git.kernel.org/stable/c/fc7ffa7f10b9454a86369405d9814bf141b30627","https://git.kernel.org/stable/c/a66998e0fbf213d47d02813b9679426129d0d114"],"weaknesses":["CWE-129"],"ingestedAt":"2026-10-29T19:49:19.404Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2021/47xxx/CVE-2021-47548.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2021-47548","state":"PUBLISHED","datePublished":"2024-05-24T15:09:52.634Z","dateUpdated":"2026-05-11T13:56:45.302Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2024-05-24T15:02:54.829Z"},"containers":{"cna":{"title":"ethernet: hisilicon: hns: hns_dsaf_misc: fix a possible array overflow in hns_dsaf_ge_srst_by_port()","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nethernet: hisilicon: hns: hns_dsaf_misc: fix a possible array overflow in hns_dsaf_ge_srst_by_port()\n\nThe if statement:\n  if (port >= DSAF_GE_NUM)\n        return;\n\nlimits the value of port less than DSAF_GE_NUM (i.e., 8).\nHowever, if the value of port is 6 or 7, an array overflow could occur:\n  port_rst_off = dsaf_dev->mac_cb[port]->port_rst_off;\n\nbecause the length of dsaf_dev->mac_cb is DSAF_MAX_PORT_NUM (i.e., 6).\n\nTo fix this possible array overflow, we first check port and if it is\ngreater than or equal to DSAF_MAX_PORT_NUM, the function 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